SERVICE MANUAL MSH-24NV - MUH-24NV - Wireless type Models MSH-09NV - MUH-09NV - SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS. No.

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1 This Servise Manual OB07 deals with MSH-07/09//8/NV-E, MUH-07/09//8/NV-E, MSH-8NV-E, and MUH-8NV-E in OB76 REVISED EDITION-A issued in July in997. Therefore, please refer to OB07, not to OB76 REVISED EDITION-A, for the above models. SPLIT-TYPE,HEAT PUMP AIR CONDITIONERS SERVICE MANUAL Wireless type Models E (WH) E MSH-07NV - MUH-07NV - E (WH) E MSH-09NV - MUH-09NV - E (WH) E MSH-NV - MUH-NV - E (WH) E MSH-8NV - MUH-8NV - E (WH) E MSH-NV - MUH-NV - E (WH) E MSH-07NV - MUH-07NV - E (WH) E MSH-09NV - MUH-09NV - E (WH) E MSH-NV - MUH-NV - E (WH) E MSH-8NV - MUH-8NV - E (WH) E MSH-NV - MUH-NV - (WH) MSH-8NV - E MUH-8NV - E No. OB07 CONTENTS MSH-8NV - E MSH-8NV - E MSH-8NV - E. TECHNICAL CHANGES. PART NAMES AND FUNCTIONS. SPECIFICATION 6. OUTLINES AND DIMENSIONS 5. WIRING DIAGRAM 5 6. REFRIGERANT SYSTEM DIAGRAM 7. PERFORMANCE CURVES 9 8. MICROPROCESSOR CONTROL 9. SERVICE FUNCTIONS 0. TROUBLESHOOTING 7. DISASSEMBLY INSTRUCTIONS 60. PARTS LIST 70. OPTIONAL PARTS BACK Refer to the Service Manual OB85 when MSH-07/09/NV- E, MSH-07/09//8NV- E, and MSH-8NVare connected with MXZ-NV- E as multi system units. E

2 TECHNICAL CHANGES MSH-7NV - E MSH-07NV -. Indoor electronic control P.C.board has changed. However, it is compatible between E and E models.. Auto restart function is added. MSH-09NV - E MSH-09NV -. Indoor electronic control P.C.board has changed. However, it is compatible between E and E models.. Auto restart function is added. MSH-NV - E MSH-NV -. Indoor electronic control P.C.board has changed. However, it is compatible between E and E models.. Auto restart function is added. MSH-8NV - E MSH-8NV -. Indoor electronic control P.C.board has changed. However, it is compatible between E and E models.. Auto restart function is added. MSH-NV - E MSH-NV -. Indoor electronic control P.C.board has changed. However, it is compatible between E and E models.. Auto restart function is added. E E E E E

3 PART NAMES AND FUNCTIONS INDOOR UNIT MSH-07NV - E MSH-07NV - E MSH-09NV - E MSH-09NV - E MSH-NV - MSH-NV - E MSH-8NV - E MSH-NV - E MSH-8NV - E MSH-NV - E MSH-8NV - E (When the front panel is open) MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-07NV - MSH-09NV - MSH-NV - E MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-07NV - MSH-09NV - MSH-NV - E MSH-8NV - E MSH-NV - E MSH-8NV - MSH-NV - MSH-8NV - E E MSH-8NV - E MSH-NV - E MSH-8NV - MSH-NV - MSH-8NV - E E UNIT OUTDOOR MUH-07NV - E MUH-09NV - E MUH-07NV - E MUH-09NV - E MUH-NV - E MUH-NV - E MUH-8NV - E MUH-NV - E MUH-8NV - E MUH-8NV - E

4 MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-8NV - E MSH-8NV - E REMOTE CONTROLLER

5 MSH-07NV - E (Serial number 70000T~) MSH-09NV - E (Serial number 70000T~) MSH-NV - E (Serial number T~) MSH-NV - E MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-8NV - E (Serial number T~) MSH-NV - MSH-8NV - E 5

6 SPECIFICATION Model Function Power supply Capacity Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Electrical data Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Compressor Output Winding resistance(at0:) Indoor fan motor Outdoor fan motor Model Winding resistance(at0:) Model Winding resistance(at0:) Width Indoor unit Height Dimensions Depth Width Outdoor unit Height Depth Weight Indoor unit Outdoor unit Air direction Special remarks Sound level (Hi) Fan speed (Hi) Fan speed regulator Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Refrigerant filling capacity(r-) RT(at5:) Thermistor RT(at5:) RT6(at0:) MSH-07NV - E E MSH-09NV - E Cooling Heating Cooling Heating Single phase,0-0v,50hzsingle phase,0-0v,50hz kw R/h K /h A INDOOR 9 OUTDOOR 60 0 INDOOR 9 OUTDOOR 60 0 A W A(kW) % A 5 5 A A INDOOR 0.7 OUTDOOR 0. INDOOR 0.7 OUTDOOR RH-5VGHT RH-7VGHT W " 650 C-R.7 C-S5.75 RCV9-AA 800 C-R.6 C-S5.8 RCV9-AA " WHT-BLK9 BLK-RED RA6V9-CB WHT-BLK9 BLK-RED RA6V9-CB " WHT-BLK8.0 BLK-RED.7 WHT-BLK8.0 BLK-RED.7 mm mm mm mm mm mm kg kg db db rpm rpm 7 7, , kg k" k" k" E NOTE:Test conditions Cooling : Indoor DB7 C / WB9 C Outdoor DB5 C / WB C Heating : Indoor DB0 C /WB5.5 C Outdoor DB 7 C / WB 6 C 6

7 Model Function Power supply Capacity Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Electrical data Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Compressor Output Winding resistance(at0:) Indoor fan motor Outdoor fan motor Model Winding resistance(at0:) Model Winding resistance(at0:) Width Indoor unit Height Dimensions Depth Width Outdoor unit Height Depth Weight Indoor unit Outdoor unit Air direction Special remarks Sound level (Hi) Fan speed (Hi) Fan speed regulator Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Refrigerant filling capacity(r-) RT(at5:) Thermistor RT(at5:) RT6(at0:) MSH-NV - E E MSH-8NV - E E E Cooling Heating Cooling Heating Single phase,0-0v,50hzsingle phase,0-0v,50hz kw R/h K /h A INDOOR 558 OUTDOOR 0-0 INDOOR 756 OUTDOOR 5 A W A(kW) % A A A INDOOR 0.7 OUTDOOR 0.7 INDOOR 0.5 OUTDOOR RH-VHAT NH-6VMDT W " 00 C-R. C-S.9 RCV9-AA 700 C-R. C-S.7 RAV7-EA " " mm mm mm mm mm mm kg kg WHT-BLK9 BLK-RED RA6V0-EC or EE WHT-BLK0 BLK-RED WHT-BLK8.8 BLK-RED50.5 RA6V50-OD or OF WHT-BLK6. BLK-RED db db rpm rpm kg k" k" k" NOTE:Test conditions Cooling : Indoor DB7 C / WB9 C Outdoor DB5 C / WB C Heating : Indoor DB0 C /WB5.5C Outdoor DB 7 C / WB 6 C 7

8 Model Function Power supply Capacity Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Electrical data Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Compressor Output Winding resistance(at0:) Indoor fan motor Outdoor fan motor Model Winding resistance(at0:) Model Winding resistance(at0:) Width Indoor unit Height Dimensions Depth Width Outdoor unit Height Depth Weight Indoor unit Outdoor unit Air direction Special remarks Sound level (Hi) Fan speed (Hi) Fan speed regulator Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Refrigerant filling capacity(r-) RT(at5:) Thermistor RT(at5:) RT6(at0:) NOTE:Test conditions Cooling : Indoor DB7 C / WB9 C Outdoor DB5 C / WB C Heating : Indoor DB0 C /WB5.5 C Outdoor DB 7 C / WB 6 C kw R/h K /h A A W A(kW) % A A A W " " " mm mm mm mm mm mm kg kg db db rpm rpm kg k" k" k" MSH-NV - E E Cooling Heating Single phase,0-0v,50hz INDOOR 0.9 OUTDOOR NH-7VMDT 00 C-R 0.96 C-S.07 RAV7-EC WHT-BLK8.8 BLK-RED50.5 RA6V85-AA WHT-BLK6.7 BLK-YLW0. YLW-RED ,

9 Refer to the Service Manual OB85 when MSH-07/09/NV- E, MSH-07/09//8NV- E, and MSH-8NV- E are connected with MXZ-NV- E as multi system units. Model Function Power supply Capacity Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Electrical data Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Compressor Output Winding resistance(at0:) Indoor fan motor Outdoor fan motor Model Winding resistance(at0:) Model Winding resistance(at0:) Width Indoor unit Height Dimensions Depth Width Outdoor unit Height Depth Weight Indoor unit Outdoor unit Air direction Special remarks Sound level (Hi) Fan speed (Hi) Fan speed regulator Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Refrigerant filling capacity(r-) RT(at5:) Thermistor RT(at5:) RT6(at0:) NOTE:Test conditions Cooling : Indoor DB7 C / WB9 C Outdoor DB5 C / WB C Heating : Indoor DB0 C /WB5.5 C Outdoor DB 7 C / WB 6 C MSH-07NV- E E (INDOOR UNIT) MSH-09NV- E E (INDOOR UNIT) Cooling Heating Cooling Heating Single phase,0-0v,50hz Single phase,0-0v,50hz kw R/h K /h A A W A(kW) % A A A W " RCV9-AA RCV9-AA " WHT-BLK9 BLK-RED WHT-BLK9 BLK-RED " mm mm mm mm mm mm kg kg db db rpm rpm kg k" k" k" , , Please refer to Service manual OB85 for capacity. 9

10 Refer to the Service Manual OB85 when MSH-07/09/NV- E, MSH-07/09//8NV- E, and MSH-8NV- E are connected with MXZ-NV- E as multi system units. Model Function Power supply Capacity Capacity Dehumidification Air flow Power outlet Running current Power input Auxiliary heater Electrical data Power factor Starting current Compressor motor current Fan motor current Coefficient of performance(c.o.p) Model Compressor Output Winding resistance(at0:) Indoor fan motor Outdoor fan motor Model Winding resistance(at0:) Model Winding resistance(at0:) Width Indoor unit Height Dimensions Depth Width Outdoor unit Height Depth Weight Indoor unit Outdoor unit Air direction Special remarks Sound level (Hi) Fan speed (Hi) Fan speed regulator Indoor unit Outdoor unit Indoor unit Outdoor unit Indoor unit Outdoor unit Refrigerant filling capacity(r-) RT(at5:) Thermistor RT(at5:) RT6(at0:) NOTE:Test conditions Cooling : Indoor DB7 C / WB9 C Outdoor DB5 C / WB C Heating : Indoor DB0 C /WB5.5 C Outdoor DB 7 C / WB 6 C MSH-NV- E E (INDOOR UNIT) MSH-8NV- E E (INDOOR UNIT) Cooling Heating Cooling Heating Single phase,0-0v,50hz Single phase,0-0v,50hz kw R/h K /h A A W A(kW) % A A A W " RAV9-AA RAV7-EA " WHT-BLK9 BLK-RED WHT-BLK8 BLK-RED5 " mm mm mm mm mm mm kg kg db db rpm rpm,0,80 kg k" k" k" Please refer to Service manual OB85 for capacity. 0

11 OUTLINES AND DIMENSIONS Unit: mm MSH-07NV - MSH-09NV - MSH-07NV - MSH-09NV - E INDOOR UNIT MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV - E OUTDOOR UNIT

12 MSH-NV - E INDOOR UNIT MSH-NV - E Unit: mm 9.5 MUH-NV - E MUH-NV - E OUTDOOR UNIT If the front or right/left sides are vacant, the top has only to be 0cm unobstructed. If the right/left sides or back side is vacant,the front has only to be 50cm unobstructed.

13 MSH-8NV - MSH-NV - MSH-8NV - MSH-NV - MSH-8NV - E INDOOR UNIT holes 0 Indoor unit Unit: mm Installation plate 90 5 Installation plate Wall hole [75 0 Air in { Liquid line [8-0.5m Gas line [-0.m Insulation [50 O.D [8 I.D Air out Drain hose [6 Insulation [ Power supply cord Lead to right m Lead to left m 60 MUH-8NV - E MUH-8NV - E MUH-8NV - E OUTDOOR UNIT If the front or right/left sides are vacant, the top has only to be 0cm unobstructed. If the right/left sides or back side is vacant,the front has only to be 50cm unobstructed.

14 MUH-NV- E MUH-NV- E Unit : mm (inch) Outdoor Unit-Necessary surrounding clearance Outdoor Unit-Necessary surrounding clearance (Concentrated installation) The upper side must be open For 0 units or less 000 Air intake 85 (7-9/) Front opening Note:Allow adequate upper clearance Air outlet 500(9-/6) Air intake 85 (7-9/) 500 Service space 7 95(-5/8) () 0 870(-/) Side air intake Rear fresh air intake Outlet guide installation hole () 6(-/) 7 Terminal block for indoor and outdoor unit connection Terminal block for power line Handle for moving Ground terminal Handle for moving Service panel (-7/6) Refrigerant-pipe flared connection [5.88 5/8F Refrigerant-pipe flared connection [9.5 /8F 95 Rear piping hole Knock out hole for front piping (refrigerant,drainage and wiring) Knock out hole for right piping (refrigerant,drainage and wiring) 60 0 R0 R0 5 max Knock out holes for power line -[7 Standard bolt length Drain hole - Oval holes (standard bolt M0) R6 Drain hole 0 Bottom piping hole -U-shaped notched holes Front right piping holesdetail figures Handle for moving 8

15 5 MSH-07NV - E MSH-09NV - E INDOOR UNIT WIRING DIAGRAM MODELS WIRING DIAGRAM ~ ~/N SYMBOL C F F MF NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MUH-07NV - E MUH-09NV - E NAME SYMBOL NAME SYMBOL NAME INDOOR FAN CAPACITOR FUSE(9:) FUSE(.5A) INDOOR FAN MOTOR NR RT RT 5C VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR CONTACTOR TB MV SR TERMINAL BLOCK VANE MOTOR SOLID STATE RELAY OUTDOOR UNIT FOR MULTI SYSTEM L TO OUTDOOR VDC UNIT N CONNECTING ; MODELS WIRING DIAGRAM SYMBOL C C65 5C F6 MC NAME COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR CONTACTOR FUSE(A) COMPRESSOR(INNER THERMOSTAT) SYMBOL MF NR6 RT6 SR6 TB NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK SYMBOL X6 S IC88 NAME REVERSING VALVE COIL RELAY REVERSING VALVE COIL DC/DC CONVERTER NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger..slide the sleeve..pull the wire while pushing the locking lever. 5

16 MSH-NV - E INDOOR UNIT MODEL WIRING DIAGRAM ~ ~/N FOR MULTI SYSTEM L TO OUTDOOR VDC UNIT N CONNECTING ; SYMBOL C F F MF NAME SYMBOL NAME SYMBOL NAME INDOOR FAN CAPACITOR FUSE(9:) FUSE(.5A) NR RT RT VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR TB MV SR INDOOR FAN MOTOR 5C CONTACTOR TERMINAL BLOCK VANE MOTOR SOLID STATE RELAY NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MUH-NV - E OUTDOOR UNIT MODEL WIRING DIAGRAM SYMBOL C C65 5C F6 MC NAME SYMBOL NAME SYMBOL NAME COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR CONTACTOR MF NR6 RT6 OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR X6 S IC88 FUSE(A) SR6 SOLID STATE RELAY COMPRESSOR(INNER THERMOSTAT) TB TERMINAL BLOCK REVERSING VALVE COIL RELAY REVERSING VALVE COIL DC/DC CONVERTER NOTE:. Use copper conductors only.(for field wiring). show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger.. Symbols below indicate. : Terminal block, : Connector 6.Slide the sleeve..pull the wire while pushing the locking lever.

17 MSH-8NV - E INDOOR UNIT MODEL WIRING DIAGRAM SYMBOL C F F MF MV NAME SYMBOL NAME SYMBOL NAME INDOOR FAN CAPACITOR FUSE(9:) FUSE(.5A) NR RT RT VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR TB DSAR HIC INDOOR FAN MOTOR IC HYBRID IC VANE MOTOR 5C CONTACTOR TERMINAL BLOCK SURGE ABSORBER DC/DC CONVERTER NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MUH-8NV - E OUTDOOR UNIT MODEL WIRING DIAGRAM SYMBOL C C65 DSAR F6 MC NAME SYMBOL NAME SYMBOL NAME COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER MF NR6 RT6 OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR X6 S 5C FUSE(A) SR6 SOLID STATE RELAY COMPRESSOR<INNER THERMOSTAT> TB TERMINAL BLOCK REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger..slide the sleeve..pull the wire while pushing the locking lever. 7

18 MSH-NV - E INDOOR UNIT MODEL WIRING DIAGRAM 0-0V~ TB RED 0-0V~ F WHT L NF TO OUTDOOR BRN BLU UNIT CONNECTING N BLU BLU POWER SUPPLY CORD ~/N 0-0V 50Hz CN 0 CN 0 BLU CN 5 MV CN0 5 WHT 5C HIC F TRANS IC NR C CN CN CN CN ELECTRONIC CONTROL P.C BOARD BRN YLW GRY WHT RED BLK RT RT MF CIRCUIT BREAKER GRN/YLW RECEIVER P.C.BOARD DISPLAY P.C.BOARD REMOTE CONTROLLER SYMBOL C F F MF MV MUH-NV - E OUTDOOR UNIT 8 NAME SYMBOL NAME SYMBOL NAME INDOOR FAN MOTOR CAPACITOR FUSE(9:) FUSE(.5A) INDOOR FAN MOTOR VANE MOTOR NR RT RT IC 5C VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR TB HIC NF TERMINAL BLOCK DC/DC CONVERTER NOISE FILTER NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MODEL WIRING DIAGRAM TO INDOOR UNIT CONNECTING TB VDC 0-0V~ WHT F N GRN/YLW MF WHT DSAR 6 YLW YLW 5 BLK BLK WHT WHT ORN ORN RED RED RED X 5 WHT ORN RED RED TB BLU 8 7 BLU 6F VLT 5C CR VLT YLW WHT WHT BLU C X BRN CN7 CN70 TAB0 YLW 5C F6 SR6 RT6 CZ WHT 5C WHT C C RED S MC R BLK CN66 IC88 TRANS X6 NR6 S BLK BLK CN7 DEICER P.C. BOARD SYMBOL NAME SYMBOL NAME SYMBOL NAME SYMBOL NAME C COMPRESSOR CAPACITOR MF OUTDOOR FAN MOTOR <INNER THERMOSTAT> X6 REVERSING VALVE COIL RELAY F FUSE(A) C DSAR F6 MC OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER FUSE(A) COMPRESSOR<INNER THERMOSTAT> NR6 RT6 SR6 TB. TB VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK S 5C 5C X REVERSING VALVE COIL CONTACTOR COMPRESSOR CONTACTOR FAN MOTOR RELAY 6F IC88 CR CZ THERMOSTAT (AIR FLOW CONTROL) DC/DC CONVERTER SURGE ABSORBER SURGE ABSORBER NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger..slide the sleeve..pull the wire while pushing the locking lever.

19 MSH-07NV - E MSH-09NV - E MSH-NV - E INDOOR UNIT TO OUTDOOR TB UNIT L BRN CONNECTING BRN VDC RED 0-0V~ F BLU WHT BLU N BLU BLU POWER SUPPLY CORD ~/N 0-0V 50Hz GRN/YLW GRN/YLW GUARD PLATE 5 5 MODELS WIRING DIAGRAM SR CN HIC CN CN0 5C NR CN BLU TRANS C F CN CN LD0 CN 5 ELECTRONIC CONTROL P.C BOARD BLK GRY YLW BRN WHT RED RT RT 5 6 MF CIRCUIT BREAKER FOR MULTI SYSTEM L VDC TO OUTDOOR UNIT N CONNECTING POWER MONITOR, RECEIVER P.C.BOARD REMOTE CONTROLLER MV SYMBOL C F F MF MUH-07NV - NAME SYMBOL NAME SYMBOL NAME INDOOR FAN MOTOR CAPACITOR FUSE(9:) FUSE(.5A) INDOOR FAN MOTOR NR RT RT 5C VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR CONTACTOR TB HIC SR MV TERMINAL BLOCK DC/DC CONVERTER SOLID STATE RELAY VANE MOTOR NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector E OUTDOOR UNIT MUH-09NV - E RT6 MODELS WIRING DIAGRAM S BLK BLK TO INDOOR UNIT CONNECTING VDC 0-0V~ TB N RED CN70 BLU TAB0 WHT BLU GRN/YLW CN66 IC88 F6 TRANS 5C X6 CN7 NR6 SR6 X6 C65 CN7 DEICER P.C. BOARD RED WHT BLK MF WHT C RED S BLK C MC R SYMBOL NAME SYMBOL NAME SYMBOL NAME SYMBOL C COMPRESSOR CAPACITOR MF OUTDOOR FAN MOTOR <INNER THERMOSTAT> X6 REVERSING VALVE COIL RELAY C65 F6 MC SR6 FUSE(A) COMPRESSOR<INNER THERMOSTAT> SOLID STATE RELAY NR6 RT6 VARISTOR DEFROST THERMISTOR S 5C REVERSING VALVE COIL CONTACTOR IC88 TB NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger. NAME FAN MOTOR CAPACITOR DC/DC CONVERTER TERMINAL BLOCK.Slide the sleeve..pull the wire while pushing the locking lever. 9

20 MUH-NV - E OUTDOOR UNIT TO INDOOR UNIT CONNECTING MODEL WIRING DIAGRAM VDC 0-0V~ GRN/YLW TB N BLU RED WHT RT6 CN66 CN70 F6 TAB0 BLU S BLK BLK X6 CN7 C65 RED WHT SR6 TRANS BLK 5C X6 CN7 DEICER P.C.BOARD WHT C C RED MC BLK S R IC88 NR6 RED ORN WHT BLK MF SYMBOL NAME SYMBOL NAME SYMBOL NAME SYMBOL C COMPRESSOR CAPACITOR MF OUTDOOR FAN MOTOR <INNER THERMOSTAT> X6 REVERSING VALVE COIL RELAY C65 F6 MC SR6 FUSE(A) COMPRESSOR<INNER THERMOSTAT> SOLID STATE RELAY NR6 RT6 VARISTOR DEFROST THERMISTOR S 5C REVERSING VALVE COIL CONTACTOR IC88 TB NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger. NAME FAN MOTOR CAPACITOR DC/DC CONVERTER TERMINAL BLOCK.Slide the sleeve..pull the wire while pushing the locking lever. 0

21 MSH-8NV - E INDOOR UNIT MODEL WIRING DIAGRAM ~/N FOR MULTI SYSTEM L TO OUTDOOR VDC UNIT N CONNECTING ; SYMBOL C F F MF MV NAME SYMBOL NAME SYMBOL NAME INDOOR FAN CAPACITOR FUSE(9:) FUSE(.5A) NR RT RT VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR TB DSAR HIC INDOOR FAN MOTOR IC HYBRID IC VANE MOTOR 5C CONTACTOR TERMINAL BLOCK SURGE ABSORBER DC/DC CONVERTER NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MUH-8NV - E OUTDOOR UNIT MODEL WIRING DIAGRAM SYMBOL C C65 DSAR F6 MC NAME COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER FUSE(A) COMPRESSOR<INNER THERMOSTAT> SYMBOL MF NR6 RT6 SR6 TB NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK SYMBOL X6 S 5C IC88 NAME REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR DC/DC CONVERTER NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger..slide the sleeve..pull the wire while pushing the locking lever.

22 MSH-NV - E INDOOR UNIT MODEL WIRING DIAGRAM TB 0-0V~ RED 0-0V~ F WHT L NF TO OUTDOOR BRN BLU UNIT CONNECTING N BLU BLU POWER SUPPLY CORD ~/N 0-0V 50Hz CN 0 CN 0 BLU CN 5 MV CN0 WHT 5C HIC TRANS F IC NR C CN CN CN CN ELECTRONIC CONTROL P.C BOARD 5 RT RT BRN YLW GRY WHT RED BLK MF CIRCUIT BREAKER GRN/YLW RECEIVER P.C.BOARD REMOTE CONTROLLER DISPLAY P.C.BOARD SYMBOL NAME SYMBOL NAME SYMBOL NAME C F F MF MV INDOOR FAN CAPACITOR FUSE(9:) FUSE(.5A) INDOOR FAN MOTOR VANE MOTOR NR RT RT IC 5C VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR HYBRID IC CONTACTOR TB NF HIC TERMINAL BLOCK NOISE FILTER DC/DC CONVERTER NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MUH-NV - E OUTDOOR UNIT MODEL WIRING DIAGRAM TO INDOOR UNIT CONNECTING MF 6 X YLW YLW 5 5 BLK BLK WHT WHT ORN ORN RED RED C TB VDC RED WHT 0-0V~ WHT F ORN RED RED 8 N TB BLU 7 6F X BLU GRN/YLW WHT DSAR VLT BRN CN7 CN70 TAB0 A YLW 5C A 5C F6 CR VLT YLW CZ WHT WHT WHT 5C WHT C BLU C RED S MC R BLK SR6 RT6 CN66 IC88 TRANS X6 BLK BLK NR6 S CN7 DEICER P.C. BOARD SYMBOL NAME SYMBOL NAME SYMBOL NAME C C DSAR CR CZ F6 MC COMPRESSOR CAPACITOR FAN MOTOR CAPACITOR SURGE ABSORBER SURGE ABSORBER SURGE ABSORBER FUSE(A) COMPRESSOR<INNER THERMOSTAT> MF NR6 RT6 SR6 TB,TB F 6F OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK FUSE(A) THERMOSTAT (AIR FLOW CONTROL) X6 S 5C 5C IC88 X REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR COMPRESSOR CONTACTOR DC/DC CONVERTER FAN MOTOR RELAY NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull.slide the sleeve. the lead wire..pull the wire while Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger. pushing the locking lever.

23 MSH-8NV - E INDOOR UNIT MODEL WIRING DIAGRAM TO OUTDOOR TB UNIT L BRN CONNECTING BRN VDC RED F BLU 0-0V~ WHT BLU N BLU BLU BRN POWER SUPPLY CORD ~/N 0-0V 50Hz DSAR GRN/YLW GRN/YLW LD CN CN 0 0 BLU CN 5 MV CN0 5 5C F HIC TRANS IC NR C ELECTRONIC CONTROL P.C BOARD CN CN CN CN BRN YLW GRY WHT RED BLK RT MF RT CIRCUIT BREAKER FOR MULTI SYSTEM L VDC TO OUTDOOR UNIT N CONNECTING RECEIVER P.C.BOARD REMOTE CONTROLLER DISPLAY P.C.BOARD SYMBOL C F F MF MV NAME SYMBOL NAME SYMBOL NAME INDOOR FAN CAPACITOR FUSE(9:) FUSE(.5A) NR RT RT VARISTOR ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR TB DSAR HIC INDOOR FAN MOTOR IC HYBRID IC VANE MOTOR 5C CONTACTOR TERMINAL BLOCK SURGE ABSORBER DC/DC CONVERTER NOTE:. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.. Use copper conductors only.(for field wiring). Symbols below indicate. : Terminal block, : Connector MUH-8NV - E OUTDOOR UNIT SYMBOL C C65 DSAR F6 MC MODEL WIRING DIAGRAM TO INDOOR UNIT CONNECTING VDC 0-0V~ GRN/YLW TB N BLU RED WHT DSAR WHT RT6 S 5C CN70 CN66 CN7 CN70 F6 X6 RED SR6 TAB WHT BLK TRANS X6 CN7 TAB0 DEICER P.C.BOARD 5C WHT NO BLU IC88 BLK BLK NR6 COM C NAME COMPRESSOR CAPACITOR OUTDOOR FAN MOTOR CAPACITOR SURGE ABSORBER FUSE(A) COMPRESSOR<INNER THERMOSTAT> SYMBOL MF NR6 RT6 SR6 TB NAME OUTDOOR FAN MOTOR VARISTOR DEFROST THERMISTOR SOLID STATE RELAY TERMINAL BLOCK SYMBOL X6 S 5C IC88 NAME REVERSING VALVE COIL RELAY REVERSING VALVE COIL CONTACTOR DC/DC CONVERTER RED BLK WHT NOTE:. Use copper conductors only.(for field wiring). Since the indoor and outdoor unit connecting wires have polarity, connect them according to the numbers.. Symbols below indicate. : Terminal block, : Connector. show the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever(projected part) of the terminal with a finger. VLT VLT C65 S C MC R RED ORN WHT BLK MF.Slide the sleeve..pull the wire while pushing the locking lever.

24 6 REFRIGERANT SYSTEM DIAGRAM MSH-07NV - E MUH-07NV - E MSH-07NV - E MUH-07NV - E Muffler INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [ 9.5 (Option) (with heat insulator) Reversing valve (-way valve) Unit:mm Indoor heat exchanger Indoor coil thermistor RT Flared connection Stop valve (with service port) Defrost thermistor RT6 Strainer Outdoor heat exchanger Room temperature thermistor RT Accumulator Capillary tube [.x800 ( pcs) Flared connection Check valve Capillary tube [.6x750 Refrigerant pipe [6.5 (Option) (with heat insulator) Stop valve Strainer Capillary tube [.x850 Reversing valve coil (-way valve coil) heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating Unit:mm MSH-09NV - E MUH-09NV - E MSH-09NV - E MSH-09NV - E Muffler INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [9.5 (Option) (with heat insulator) Reversing valve (-way valve) Indoor heat exchanger Indoor coil thermistor RT Flared connection Stop valve (with service port) Defrost thermistor RT6 Strainer Outdoor heat exchanger Room temperature thermistor RT Accumulator Capillary tube [.x800 ( pcs) Flared connection Check valve Capillary tube [.6x00 Refrigerant pipe [6.5 (Option) (with heat insulator) Stop valve Strainer Capillary tube [.6x00 Reversing valve coil (-way valve coil) heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating

25 Unit:mm MSH-NV - E MUH-NV - E MSH-NV - E Refrigerant pipe [.7 Reversing valve MUH-NV - E (Optional) (-way valve) INDOOR UNIT (with heat insulator) Muffler OUTDOOR UNIT Indoor heat exchanger Indoor coil thermistor RT Flared connection Stop valve (with service port) Defrost thermistor RT6 Outdoor heat exchanger RT Room temperature thermistor RT MSH-8NV - MSH-8NV - E MSH-8NV - E INDOOR UNIT Flared connection Refrigerant pipe (Option) [6.5 (with heat insulator) Strainer Stop valve Accumulator Capillary tube [.x500 Check valve Compressor Capillary tube [.6x00 Refrigerant flow in cooling Refrigerant flow in heating Unit:mm E MUH-8NV - E MUH-8NV - E MUH-8NV - E OUTDOOR UNIT Refrigerant pipe [5.88 (Option) Reversing valve (- way valve) Reversing valve coil (-way valve coil) heating ON cooling OFF (with heat insulator) Muffler Indoor heat exchanger Indoor coil thermistor RT Distributor Flared connection Stop valve (with service port) Strainer Defrost thermistor RT6 Outdoor heat exchanger Room temperature thermistor RT Flared connection Accumulator Compressor Capillary tube [.6x750 ( pcs) Refrigerant pipe (Option) [6.5 (with heat insulator) Strainer Stop valve Capillary tube [.0X800 Check valve Reversing valve coil (-way valve coil) heating ON cooling OFF Refrigerant flow in cooling Refrigerant flow in heating 5

26 MSH-NV - E MUH-NV - E MSH-NV - E MUH-NV - E INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [5.88 (Option) (with heat insulator) Muffler Reversing valve (- way valve) Unit:mm Indoor heat exchanger Indoor coil thermistor RT Distributor Flared connection Ball valve Strainer Outdoor heat exchanger Room temperature thermistor RT Flared connection Accumulator Check valve Compressor Capillary tube [.6X50 Discharge pressure regurator open.5 kgf/j Defrost thermistor RT6 Strainer Refrigerant pipe (Option) [9.5 (with heat insulator) Ball valve with Service port Capillary tube [.0X50 Check valve Capillary tube [.X00 Refrigerant flow in cooling Refrigerant flow in heating 6

27 MAX. REFRIGERANT PIPING LENGTH Models Refrigerant piping Max. length : m Piping size O.D : mm Length of connecting pipe : m A Gas Liquid Indoor unit Outdoor unit MSH-07NV - E MSH-09NV - E MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-NV - E MSH-8NV - E MSH-8NV - E 5 MSH-8NV - E MSH-NV - E MSH-NV - E MAX. HEIGHT DIFFERENCE ADDITIONAL REFRIGERANT CHARGE(R- : g) Outdoor unit precharged Models (up to 7m) 7m MSH-07NV - E Refrigerant piping length (one way) 0m 5m MSH-09NV - E MSH-07NV - E 850 MSH-09NV - E MSH-NV - E MSH-NV - E MSH-8NV - E 00 MSH-8NV - E 800 MSH-8NV - E Calculation : Xg=50g/m (A-7)m Models Outdoor unit precharged (up to 7m) 7m Refrigerant piping length (one way) 0m 5m MSH-NV - MSH-NV - E E Calculation : Xg=65g/m (A-7)m 7

28 EVACUATION PROCEDURES(AIR PURGE) Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor and the outdoor units. Remove the service port cap of the stop valve on the side of the outdoor unit gas pipe.(the stop valve will not work in its initial state fresh out of the factory (totally closed with cap on)) When vacuuming Connect the gage manifold valve and the vacuum pump to the service port of the stop valve on the liquid pipe side of the outdoor unit. Run the vacuum pump for more than 5 minutes and at this time confirm that the pressure gage indicates 0. Mpa. Check the vacuum with the gage manifold valve, then close the gage manifold valve, and stop the vacuum pump. Leave it as it is for one or two minutes. Make sure the pointer of the gage manifold valve remains in the same position. Remove the gage manifold valve quickly from the service port of the stop valve. After refrigerant pipes are connected and evacuated, fully open all stop valves on gas and liquid pipe sides. Operating without fully opening lowers the performance and causes trouble. Pipe length : 7m maximum No gas charge is needed Pipe length exceeding 7m Charge the prescribed amount of gas Tighten the cap to the service port to obtain the initial status. Retighten the cap. 8 Leak test

29 7 PERFORMANCE CURVES The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions, since operating conditions vary according to the areas where these units are installed. The following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. () GUARANTEED VOLTAGE Rated voltage : ±0% (98 ~ 6V),50Hz () AIR FLOW Air flow should be set at MAX. () MAIN READINGS () Indoor intake air wet-bulb temperature : CWB () Indoor outlet air wet-bulb temperature : CWB () Outdoor intake air dry-bulb temperature : CDB () Total input: W (5) Indoor intake air dry-bulb temperature : CDB (6) Outdoor intake air wet-bulb temperature : CWB (7) Total input : W } } Cooling Heating Indoor air wet/dry-bulb temperature difference on the left side of the chart on next page shows the difference between the indoor intake air wet/dry-bulb temperature and the indoor outlet air wet/dry-bulb temperature for your reference at service. How to measure the indoor air wet-bulb/dry-bulb temperature difference. Attach at least sets of wet-and dry-bulb thermometers to the indoor air intake as shown in the figure, and at least sets of wet-and dry-bulb thermometers to the indoor air outlet. The thermometers must be attached to the position where air speed is high.. Attach at least sets of wet-and dry-bulb thermometers to the outdoor air intake. Cover the thermometers to prevent direct rays of the sun.. Check that the air filter is cleaned.. Open windows and doors of room. 5. Press the EMERGENCY OPERATION switch once(twice) to start the EMERGENCY COOL(HEAT) MODE. 6. When system stabilizes after more than 5 minutes, measure temperature and take an average temperature minutes later, measure temperature again and check that the temperature does not change. INDOOR UNIT OUTDOOR UNIT Wet-and dry-bulb thermometers Wet-and dry-bulb thermometers 9

30 Outdoor low pressure NOTE:The above curves are for the heating operation without any frost. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Dry-bulb temperature Relative humidity(%) ➁ Air flow should be set at MAX. The unit of pressure has been changed to MPa on the international system of units(si unit system). The conversion factor is : (MPa G) =0.(kgf/f G) (kgf/f G)(MPa G) MUH-07NV - E E MUH-07NV - E E 0/0V Outdoor unit current (A) 0V 0V 0 Ambient temperature( C) Ambient humidity(%) Ambient temperature( C) Ambient humidity(%)

31 (kgf/f G)(MPa G) Outdoor low pressure MUH-09NV - 0/0V E E MUH-09NV - E E Outdoor unit current (A) 0V 0V 0. (kgf/f G)(MPa G) Ambient temperature( C) Ambient humidity(%) MUH-NV - Ambient temperature( C) Ambient humidity(%) E E MUH-NV - E E Outdoor low pressure /0V Outdoor unit current (A) 0V 0V 0. Outdoor low pressure Ambient temperature( C) Ambient humidity(%) (kgf/f G)(MPa G) MUH-8NV - E /0V E E Outdoor unit current (A) Ambient temperature( C) Ambient humidity(%) MUH-8NV - 0V E 0V E E 0. Outdoor low pressure Ambient temperature( C) Ambient humidity(%) (kgf/f G)(MPa G) MUH-NV - E V E Outdoor unit current (A) Ambient temperature( C) Ambient humidity(%) MUH-NV - 0V E E 0V 0. Ambient temperature( C) Ambient humidity(%) Ambient temperature( C) Ambient humidity(%)

32 HEAT operation Condition indoor:dry bulb temperature 0.0 C Wet bulb temperature.5 C Outdoor:Dry bulb temperature 7,5,0 C Wet bulb temperature 6,,.5 C MUH-07NV - E E MUH-NV - E E Outdoor unit current (A) 0V 0V Outdoor unit current (A) 0V 0V Ambient temperature( C) Ambient temperature( C) MUH-09NV - E E MUH-8NV - E E E Outdoor unit current (A) 0V 0V Outdoor unit current (A) 0V 0V Ambient temperature( C) Ambient temperature( C) MUH-NV - E E Outdoor unit current (A) 0 9 0V 0V Ambient temperature( C)

33 8 MICROPROCESSOR CONTROL Wireless remote controller MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-8NV - E MSH-NV - E MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-8NV - MSH-NV - MSH-8NV - E Once the controls are set, the same operation mode can be repeated by simply turning the OPERATE/STOP button ON. Indoor unit receives the signal with a beep tone. When the system turns off, -minute time delay will operate to protect system from overload and compressor will not restart for minutes. 8-. I FEEL CONTROL ( ) OPERATION () Press OPERATE/STOP button on the remote controller. OPERATION INDICATOR lamp of the indoor unit will turn on with a beep tone. () Press OPERATION SELECT button to set I FEEL CON- TROL ( ). Then a beep tone is heard. () The operation mode is determined by the initial room temperature at start-up of the operation. Initial room temperature more than 5: : to 5: less than : Mode COOL mode of "I FEEL CONTROL" DRY mode of "I FEEL CONTROL" HEAT mode of "I FEEL CONTROL" Once the mode is fixed, the mode will not change by room temperature afterwards. Under the ON-TIMER ( ) operation, mode is determined according to the room temperature as the operation starts. When the system is stopped with the OPERATE/STOP button on the remote controller, and restarted within hours in I FEEL CONTROL ( ) mode, the system operates in previous mode automatically regardless of the room temperature. Example Previous operation COOL mode of I FEEL CONTROL or COOL mode Restart COOL mode of I FEEL CONTROL INDOOR UNIT DISPLAY SECTION When the system is restarted after hours, the operation mode is determined by the initial room temperature at start-up of the operation. Example Previous operation COOL mode of I FEEL CONTROL or COOL mode Restart COOL or DRY or HEAT mode of I FEEL CONTROL that determined by initial room temperature at start-up of the operation.

34 () The initial set temperature is decided by the initial room temperature. Model Initial room temperature Initial set temperature COOL mode of "I FEEL CONTROL" DRY mode of "I FEEL CONTROL" 6: or more 6: or less : or 5: : Initial room temperature minus : Initial room temperature minus : HEAT mode of "I FEEL CONTROL" : or less 6: After the system restarts by the remote controller, the system operates with the previous set temperature regardless of the initial set temperature. The set temperature is calculated by the previous set temperature. (5) TEMPERATURES buttons In I FEEL CONTROL ( ) mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature is controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Each time the TOO WARM or TOO COOL button is pressed,the indoor unit receives the signal and emits a beep tone. Fuzzy control When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, considering the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user s preference to heat or cool. So this is called Fuzzy control, and works only in I FEEL CONTROL mode. In DRY mode of I FEEL CONTROL, the set temperature doesn t change. TOO COOL To raise the set temperature ~ degrees( C) TOO WARM To lower the set temperature ~ degrees( C)

35 COOL mode of I FEEL CONTROL ON ON Compressor and outdoor fan motor OFF OFF Indoor fan motor ON Run continuously in cooling mode NOTE : Coil frost prevention during COOL mode of I FEEL CONTROL There are two types of controls in coil frost prevention. Temperature control <MSH-07/09/> When the indoor coil thermistor RT reads C or below for 5 minutes, the coil frost prevention mode starts. <MSH-8/>When the indoor coil thermistor RT reads C or below, the coil frost prevention mode starts immediately. However the coil frost prevention will not work for 5 minutes after the compressor starts. The compressor stops and the indoor fan operates at the set speed for 5 minutes. After that, if RT still reads below C (MSH-07/09/) or below C (MSH-8/) this mode prolonged until the RT reads over C (MSH-07/09/) or C (MSH-8/). Time control When the three conditions below have been satisfied for hour and 5 minutes, compressor stops for minutes. a. Compressor has been continuously operating. b. Indoor fan speed is Lo or Me. c. Room temperature is below 6 C. When compressor stops, the accumulated time is cancelled and when compressor restarts, time counting starts from the beginning. Time counting also stops temporarily when the indoor fan speed becomes Hi or the room temperature exceeds 6 C.However, when two of the above conditions (b.and c.) are satisfied again.time accumulation is resumed. Indoor fan operates at the set speed by FAN SPEED CONTROL button. Followings are the fan speed in AUTO. Initial temperature difference Fan Speed Room temperature minus set temperature : degrees or more Hi Room temperature minus set temperature : degree or more and less than degrees Me deg. deg. Room temperature minus set temperature : less than degree Lo deg..66 deg. DRY mode of I FEEL CONTROL The system for dry operation uses the same refrigerant circuit as the cooling circuit. The compressor and the indoor fan are controlled by the temperature and the microprocessor. By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease. The operation of the compressor and indoor fan is as follows.. When the room temperature is C or over: Compressor operates by temperature control and time control. Set temperature is controlled to fall C as initial set temperature. When the thermostat is ON, the compressor repeats 8 minutes ON and minutes OFF. When the thermostat is OFF, the compressor repeats minutes OFF and minute ON. Indoor fan and outdoor fan operate in the same cycle as the compressor.. When the room temperature is under C. When the thermostat is ON, the compressor repeats minutes ON and minutes OFF. When the thermostat is OFF, the compressor repeats minutes OFF and minute ON. 5

36 Operation time chart Example Thermostat st ON OFF ON ON ON ON Indoor fan OFF OFF ON ON ON Outdoor fan compressor OFF OFF 8 min. min. min. min. NOTE Coil frost prevention during DRY mode of I FEEL CONTROL The operation is as same as coil frost prevention during COOL mode of I FEEL CONTROL. However the indoor fan speed becomes the set speed or Lo. HEAT mode of I FEEL CONTROL. Indoor fan speed control () Followings are the fan speed in AUTO. Initial temperature difference Fan speed Set temperature minus room temperature: degrees or more Hi Set temperature minus room temperature: degree or more and less than degrees Me Set temperature minus room temperature: less than degree Lo deg. deg. () Cold air prevention control deg..66 deg. The fan runs at set speed when the indoor coil thermistor RT temperature exceeds C. The fan operates at VLo when the temperature is below 8 C. But the fan stops when the indoor fan operates at VLo and the temperature is 5 C or less. NOTE : At initial in hysteresis this control works. Released Cold Air Prevention () New warm air control. 8: : When compressor starts in heating operation or after defrosting, the fan changes the speed due to the indoor coil thermistor RT temperature to blow out warm air. After releasing of cold air prevention, when the indoor coil temperature is 7 C or above, the fan speed shifts to the set speed, and when the fan speed is changed by the remote controller, the fan speed is the set speed. When the indoor coil temperature is less than 7 C, the fan speed is controlled by time as below. <Time condition> <Indoor fan speed> less than minutes Lo minutes to minutes Me minutes or more Hi The upper limit of the fan speed is the set speed. If the thermostat turns off, this operation changes to flow soft control. () Flow soft control After the thermostat turns off, the indoor fan operates at VLo. NOTE : When the thermostat turns on, the fan operates at the set speed. Due to the cold air prevention control, the fan does not start until the indoor coil thermistor RT reads C or more. 6

37 . High pressure protection During heating operation, the outdoor fan motor is controlled by the indoor coil thermistor RT temperature for excess rise protection of compressor discharge pressure. Outdoor fan OFF : 5 C (MSH-07/09//), 50 C (MSH-8) Outdoor fan ON : 8 C (MSH-07/09//), 6 C (MSH-8) High pressure protection time chart Indoor coil thermistor RT temperature 5 C(MSH-07/09//) 50 C(MSH-8) 8 C(MSH-07/09//) 6 C(MSH-8) Outdoor fan motor turn OFF Outdoor fan motor turn ON Outdoor fan motor ON OFF ON OFF NOTE :When the outdoor fan is OFF in heating, defrosting of outdoor heat exchanger is not detected by the defrost thermistor RT6. NOTE :When connected to MXZ-NV- E outdoor unit,the MSH-07/09/NV- E, MSH-07/09//8NV- E and MSH-8NV- E indoor unit sends the data for the temperature to the outdoor unit according to the indoor coil temperature.for the further information,refer to the service manual No.OB85.. Defrostings Defrostings of outdoor heat exchanger is controlled by DEICER P.C. board, with detection by the defrost thermistor RT6. () Defrost starting conditions When all conditions of a) ~ c) are satisfied, the defrosting operation starts. a) Under the heat operation, the compressor cumulative operation time exceeds 0 minutes without the defrosting operation working. b) The defrost thermistor RT6 reads - C or less. c) After releasing the high pressure protection minutes and 5 seconds have elapsed. () Defrost terminating conditions When the condition d) or e) is satisfied, the defrosting operation stops. d) The defrost thermistor RT6 reads. C or more. e) The defrosting time exceeds 0 minutes. 7

38 () Defrosting time chart Defrost thermistor RT6.: or more -: or less Outdoor 5C relay(compressor) ON OFF X6 (Reversing valve coil) ON OFF 0 sec. 5 sec. 0 sec. 5~5 sec. SR6 Outdoor fan ON OFF Defrost counter ON OFF Max 0 min. Indoor fan ON OFF VLo Indoor vane Horizontal Set position NOTE When the indoor coil thermistor reads above 8 C, indoor fan operates at VLo for 0 seconds. When the indoor coil thermistor reads 8 C or less, the indoor fan stops. NOTE: Refer to the Service Manual OB85 when MSH-07/09/NV- E, MSH-07/09//8NV- E, and MSH-8NVare connected with MXZ-NV- E as multi system units. E 8

39 . Reversing valve control Heating ON Cooling OFF Dry OFF NOTE: The Reversing valve reverses for 5 seconds right before start-up of the compressor. NOTE: Refer to the Service Manual OB85 when MSH-07/09/NV- E, MSH-07/09//8NV- E, and MSH-8NVare connected with MXZ-NV- E as multi system units. (COOL / DRY) (HEAT) 5 sec. 5 sec. E Compressor Reversing valve Outdoor fan ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF 8-. COOL ( ) OPERATION () Press OPERATE/STOP button. OPERATION INDICATOR of the indoor unit turns on with a beep tone. () Select COOL mode. () Set the TEMPERATURES button. (TOO WARM or TOO COOL button) The setting range is 6 ~ C Indoor fan continues to operate regardless of thermostat s OFF-ON Coil frost prevention is as same as COOL mode of I FEEL CONTROL 8-. DRY ( ) OPERATION () Press OPERATE/STOP button. OPERATION INDICATOR of the indoor unit turns on with a beep tone. () Select DRY mode. () The microprocessor reads the room temperature and determines the set temperature. Set temperature is as shown on the right chart. Thermostat (SET TEMP.)does not work. The other operations are same as DRY mode of I FEEL CONTROL. () DRY operation will not function when the room temperature is C or below. (5) When DRY operation functions, the fan speed is lower than cool operation. 8-. HEAT ( ) OPERATION () Press OPERATE/STOP button. OPERATION INDICATOR on the indoor unit turns on with a beep tone. () Select HEAT mode. () Press TEMPERATURES button (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 6 ~ C. () Indoor fan speed control, high pressure protection, defrosting, heater control are the same as HEAT mode of I FEEL CONTROL. 9

40 8-5. FAN MOTOR CONTROL () Rotational frequency feedback control The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feedback the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (Hi,Me,Lo,SLEEP), the microprocessor controls SR (MSH-07/09/), IC (MSH-8/) and adjusts fan motor electric current to make the current rotational frequency close to the target rotational frequency. With this control, when the fan speed is switched, the rotational frequency changes smoothly. SLEEP () Fan motor lock-up protection When the rotational frequency feedback signal has not output for seconds, (or when the microprocessor cannot detect the signal for seconds) the fan motor is regarded locked-up. Then the electric current to the fan motor is shut off. minutes later, the electric current is applied to the fan motor again. During the fan motor lock-up, the OPERATION INDICATOR lamp flashes on and off to show the fan motor abnormality. (See page 9.) 8-6. AUTO VANE OPERATION () Vane motor drive MSH-N series is equipped with a stepping motor for the vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. V) transmitted from indoor microprocessor. () The auto vane angle changes as follows by pressing the VANE CONTROL ( ) button. 0

41 () Positioning The vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle. The positioning is decided as follows. (a) When the OPERATE/STOP button is pressed. (POWER ON/OFF) (b) When the vane control is changed from AUTO to MANUAL. (c) When the SWING is finished. (d) When the test run starts. (e) When the power supply turns ON. () VANE AUTO ( ) mode In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum room-temperature distribution. In COOL and DRY operation Vane angle is fixed to Angle. ➁ In HEAT operation Vane angle is fixed to Angle. (5) Dew prevention During COOL or DRY operation at vane Angle or 5 when the compressor cumulative operation time exceeds hour, the vane angle automatically changes to Angle for dew prevention. (6) SWING MODE ( ) By pressing the SWING button ( ) vane swings vertically. The remote controller displays. SWING mode is cancelled when the SWING button or VANE CONTROL button ( ) is pressed or the operation stops or changes to other mode. (7) Cold air prevention in HEAT operation When either of the following conditions occurs in HEAT operation, the horizontal vane angle changes to Angle automatically to prevent cold air blowing on users. Compressor is not operating. ➁ Defrosting is performed. ➂ Indoor coil thermistor RT reads : or below. ➃ Indoor coil thermistor RT temperature is raising from C or below, but it does not exceed 8:. Indoor coil thermistor RT temperature Angle NOTE:At initial in hysteresis this control works. : 8: Set position 8-7. SLEEP MODE ( ) When the SLEEP button ( ) is pressed, the indoor fan speed drops and the air flow sound from the indoor unit is decreased. The indications of the remote controller are and. When the FAN SPEED CONTROL button ( ) is pressed during the SLEEP mode, the SLEEP mode is released.

42 8-8. TIMER OPERATION. How to set the timer () Press OPERATE/STOP button to start the air conditioner. () Check that the current time is set correctly. NOTE : Timer operation will not work without setting the current time. Initially AM0:00 blinks at the current time display of TIME MONITOR so set the current time, correctly with CLOCK SET button. () Press TIMER CONTROL button to select the operation. button... AUTO START operation (ON timer) button... AUTO STOP operation (OFF timer) () Press HR. and MIN. button to set the timer. Time setting is 0-minute units. HR. and MIN. button will work when or mark is flashing. These marks disappear in minute. When setting the ON timer, check that OPERATION INDICATOR lamp of the indoor unit lights. NOTE : Be sure to place the remote controller at the position where its signal can reach the air conditioner even during TIMER operation, or the set time may deviate within the range of about 0 minutes. NOTE : Reset the timer in the following cases, or the set time may deviate and other malfunctions may occur. A power failure occurs. The circuit breaker functions.. CANCEL TIME setting can be cancelled with the TIMER CONTROL buttons. ( or ) To cancel the ON timer, press the button. To cancel the OFF timer, press the button. TIME is cancelled and the display of set time disappears. PROGRAM TIMER The OFF timer and ON timer can be used in combination. and display shows the order of the OFF timer and ON timer operation. (Example ) The current time is 8:00 PM. The unit turns off at :00 PM, and on at 6:00 AM. (Example ) The current time is :00 AM. The unit turns on at 5:00 PM, and off at 9:00 PM. NOTE : TIMER setting will be cancelled by power failure or breaker functioning.

43 8-9. EMERGENCY-TEST OPERATION When the remote controller is missing, has failed or the batteries run down, press the EMERGENCY OPERATION switch on the front of the indoor unit. The unit will start and the OPERATION INDICATOR lamp will light. The first 0 minutes of operation will be the test run operation. This operation is for servicing. The indoor fan runs at high speed and the system is in continuous operation. The thermostat is ON and the timer is reset to normal. After 0 minutes of test run operation the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of C. The fan shifts to Me speed. This operation continues until the EMERGENCY OPERATION switch is pressed or a button on the remote controller is pressed, then normal operation will start. The coil frost prevention circuit operates in this operation, and defrosting operates too. In the test run or emergency operation, the horizontal vane operates in AUTO mode with a set temperature of C. Defrosting of outdoor heat exchanger works in EMERGENCY HEAT MODE. NOTE : Do not press the EMERGENCY OPERATION switch during normal operation. Press once <Cool> Press again <Heat> Press once again <Stop> Emergency operation switch

44 9 SERVICE FUNCTIONS. COMPULSORY DEFROSTING MODE FOR SERVICE By short circuit of the connector JP607 and R85 on the outdoor deicer P.C. board, defrosting mode can be accomplished regardless of the defrost interval restriction. See Page 56 and 59. Defrost thermistor RT6 must read below - C. DEFROST TERMINATION CHANGE <JPC> when the JPC wire of the deicer P.C. board is cut, the defrost interval time will be changed. (See page 56 and 59.) <JPE> when the JPE wire of the deicer P.C. board is cut, the defrost temperature will be changed. (See page 56 and 59.) MODEL MSH-07/09/NV- MSH-8NV- MSH-NV- E E E E E E E Junper wire JPC JPE Change point Defrost interval time changes from 0 minutes to 5 minutes Deforst start temperature changes from -: to 0: Deforst finish temperature changes from.: to 0.:.. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board. The time will be shortened as follows. -minute delay : -minute -second. AUTO START : hour -minutes Short the connector during the timer mode. AUTO STOP : hour -minutes }. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum of indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit. ()<The reset button can be located on the rear side.> MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-8NV - MSH-8NV - E E How to modify the remote controller P.C. board Remove batteries before modification. The board has a print as shown below : NOTE : For remodeling, take out the batteries at first. After finish remodeling, put back the batteries then push the RESET button. Originally, chip parts are fitted on J0/J0 side and there is no chip parts on the other side. Remove the chip parts of J0/J0 side and connect Jumper wire to J/J side as shown in Table. Either JO or J /J0 or J should be attached for normal operation. Table. No. unit No. unit No. unit No. unit unit operation No modification units operation Same as at left Replace J0 with J units operation Same as at left Same as at left Replace J0 with J units operation Same as at left Same as at left Same as at left Replace J0 with J Replace J0 with J NOTE : At power supply failure or installation, indoor unit deletes the memory about remote controller. When the power supply is turned on and indoor unit receives the first signals from the remote controller, the remote controller number is designated as the indoor unit number. Therefore at and after the second time indoor unit accepts the remote controller of the initial setting number. At setting - error, turn the power supply off to cancel the individual operation and then turn the power supply on to restart the setting.

45 ()<The reset button can be located on the front side.> MSH-07NV - E (Serial number 70000T~) MSH-09NV - E (Serial number 70000T~) MSH-NV - E (Serial number T~) MSH-NV - E MSH-07NV - E MSH-09NV - E MSH-NV - E MSH-8NV - E (Serial number T~) MSH-NV - MSH-8NV - E How to modify the remote controller P.C. board Remove batteries before modification. The board has a print as shown below : NOTE : For remodeling, take out the batteries at first. After finish remodeling, put back the batteries then push the RESET button. The P.C.board has the print J and J.Jumper wires are mounted to each J and J.Cut J and J according to the number of indoor unit as shown in Table. After modification,push the reset button. Table. No. unit No. unit No. unit unit operation No modification units operation Same as at left Cut J units operation Same as at left Same as at left Cut J units operation Same as at left Same as at left Same as at left No. unit Cut both J and J NOTE : At power supply failure or installation, indoor unit deletes the memory about remote controller. When the power supply is turned on and indoor unit receives the first signals from the remote controller, the remote controller number is designated as the indoor unit number. Therefore at and after the second time indoor unit accepts the remote controller of the initial setting number. At setting - error, turn the power supply off to cancel the individual operation and then turn the power supply on to restart the setting. 5

46 5. AUTO RESTART FUNCTION MSH-07NV - E MSH-09NV - MSH-NV - E MSH-NV - MSH-8NV - E When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed are memorized by the indoor electronic control P.C.board. The AUTO RESTART FUNCTION sets to work the moment power has restored after power failure.then, the unit will restart automatically. However if the unit is operated in I FEEL CON- TROL. mode before power failure, the operation is not memorized. In I FEEL CONTROL. mode, the operation is decided by the initial room temperature. E E How to set AUTO RESTART FUNCTION Turn off the main power for the unit. Removed the electronic control P.C. board and the display P.C.board. (See page 60 and 6.) Cut the RESISTOR JR07 (MSH-07/09/) or JR06(MSH-8/) on the indoor electronic control P.C.board. MSH-07/09/ MSH-8/ C IC CN 5C CN 5C CN0 CN C CN0 IC0 CN CN IC0 RA0 BZ CN0 SW CN CN CN SW CN5 CN0 CN5 JR07 JR06 Operation If the main power (0/0V AC) has been cut, the operation settings remain. After the power is restored, the unit restarts automatically according to the memory.(however, it takes at least minutes for the compressor to start running.) Note: The operation settings are memorized when 0 seconds have passed after the remote controller was operated. If main power is cut while AUTO START/STOP timer is active,the timer setting is cancelled when auto restart function works. If the unit has been off with the remote controller before power failure, the auto restart function does not works as the power button of the remote controller is off. To prevent breaker off due to the rush of startting current, systematize other home appliance not to turn on at the same time. When more than one air conditioners are connected under the same power system,compressor starting current as large as that for all the compressors used flows at a time as soon as the units restart automatically. Therefore, the specific counter-measures are required to prevent main voltage drop or the rush of starting current after power failure by providing the system to allow the units to start in regular succession. 6

47 0 TROUBLESHOOTING MSH-07NV - E MSH-09NV - E MSH-NV - MSH-8NV - E MSH-NV - E MSH-07NV - MSH-09NV - E MSH-NV - E MSH-8NV - MSH-NV - MSH-8NV - E E E E 0- Cautions on troubleshooting 0-- Before troubleshooting, check the followings: ) Check the power supply voltage. ) Check the indoor/outdoor connecting wire for mis-wiring. 0-- Take care the followings during servicing. ) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then after confirming the horizontal vane is closed, turn off the breaker. ) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components. ) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wiring Housing point 0-- Troubleshooting procedure ) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing on and off before starting service work. ) If the electronic control P.C. board is supposed to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration. ) When troubleshooting, refer to the flow chart on page 8 and the check table on page How to replace batteries Weak batteries may cause the remote controller malfunction. In this case, the remote controller can not be repaired only by the battery replacement. To operate the remote controller normally, discharge the remote controller in the following order. This remote controller has the reset button. After refilling new batteries, press the reset button with tip end of ball point pen or the like, and then use the remote controller. A B RESET button RESET button There are two kind of remote controllers. A type has the RESET button at the back, and B type does it on the front. How to use the two buttons are given in the Instruction Manual. 7

48 0- Instruction of troubleshooting Start Indoor unit operates. Outdoor unit doesn t operate. Outdoor unit operates in only Test Run operation. Outdoor unit doesn t operate even in Test Run operation. Indoor unit dosen t receive the signal from remote controller. Refer to B Check of receiver P.C. board on page 5. -time flash OPERATION INDICATOR lamp on the indoor unit is flashing on and off. -time flash.5-second OFF -time flash.5-second OFF Indoor unit doesn t receive the signal from remote controller. Also, OPERATION INDI- CATOR lamp doesn t flash, when the EMER- GENCY OPERATION switch is pressed. Refer to C Check of indoor electronic control P.C. board on page 5. Check room temperature thermistor. Refer to D Check of outdoor unit on page 5. Refer to E How to check mis-wiring and signal error (when outdoor unit doesn t work) on page 5 and 5. Cause:indoor/outdoor unit connecting Trouble of mis-wiring Trouble of the serial signal ( Cause:Indoor unit -time-room temperature/indoor coil thermistor trouble -time-indoor fan motor trouble Check indoor coil thermistor. Refer to Test point diagram and voltage on page 55,57 and 58. Refer to A Check of indoor fan motor on page 5. 6-time flash.5-second OFF Cause:outdoor unit 6-time-Replace the outdoor thermistor Check room temperature thermistor. Refer to Test point diagram and voltage on page 55,57 and 58. <The case of the trouble of the serial signal> When turn off the power and then turn on the power again, the indication shows the trouble of mis-wiring. 8

49 0-- troubleshooting check table Before taking measures, make sure that the symptom reappears, for accurate troubleshooting. Self check table NO. Abnormal point Indication Symptom Detect method Check point Mis-wiring Serial signal 0.5-second ON 0.5-second OFF -time flash Outdoor unit does not run. When serial signal stops for to 5 seconds after st on of 5C relay by POWER turning on. When serial signal from outdoor unit stops for to 5 seconds. Check wiring (visual check and conductivity check). Check indoor electronic control P.C.board. Check outdoor DEICER P.C. board. Check electrical parts..5-second OFF Indoor coil thermistor Room temperature thermistor -time flash.5-second OFF Outdoor unit does not run. Detect Indoor coil/room temperature thermistor short or open circuit every seconds during operation. Check thermistor calibration. Reconnect connector. Check indoor electronic control P.C.board. Indoor fan motor -time flash.5-second OFF Indoor fan repeats seconds ON and minutes OFF. When the indoor fan breaks, the fan keeps stopping. When rotational frequency feedback signal is not emit during -second indoor fan operation. Disconnect connector CN and then check connector CN - to make sure rotational frequency feedback signal of.5v or over exists. Check indoor electronic control P.C. board. Check indoor fan motor. Reconnect conector. Outdoor thermistor 6-time flash Outdoor unit does not run When the outdoor thermistor shorts or opens after the compressor start-up. Shortage of refrigerent. Check outdoor DEICER P.C. board..5-second OFF 5 Outdoor power system 5-time flash.5-second OFF Outdoor unit does not run When the compressor operation is continuosly three times interruped by overcurrent protection within minute after start-up, it stops operation. Check the inverter output. Check the compressor. 6 Outdoor control P.C. board 7-time flash.5-second OFF Outdoor unit does not run The outdoor unit stops operation when it cannot properly read data in the nonvolatile memory of the outdoor control P.C.board. Check the outdoor control P.C.board. 7 Outdoor control P.C. board 8 Outdoor control P.C. board 0-time flash light flash.5-second OFF.5-second OFF Outdoor unit does not run Outdoor unit runs but the indoor unit does not run. When the indoor unit detects drain abnormality and the indoor coil temperature is too low. When the operation mode of each rooms is setted COOL(includes DRY) and HEAT at same time, it take precedence the operation mode runs first. Check the drain punp. Check the drain sensor. Check LEV. Adjust the operation mode. The indication is shown only when the indoor unit connects with the outdoor unit MXZ-NV- E. 9

50 0-- Trouble criterion of main parts MSH-07NV- E MSH-09NV- E MSH-NV- E MSH-8NV- E MSH-NV- E MSH-07NV- E MSH-09NV- E MSH-NV- E MSH-8NV- MSH-NV- MSH-8NV- E Part name Check method and criterion Room temperature thermistor Indoor coil thermistor Defrost thermistor Measure the resistance with a tester. (Part temperature 0 C ~ 0 C) Normal 8kΩ ~ 0kΩ Measure the resistance with a tester. (Part temperature 0 C ~ 0 C) Normal 5kΩ ~ 60kΩ Abnormal Opened or short-circuited Abnormal Opened or short-circuited Figure Compressor Measure the resistance between the terminals with a tester. (Coil wiring temperature 0 C ~ 0 C) Normal 07NV 09NV NV 8NV NV C-R C-S.67~.50Ω 5.07~6.0Ω.88~.5Ω 5.~6.8Ω.85~.8Ω.~.Ω.05~.0Ω.8~.9Ω 0.85~.0Ω.8~.Ω Abnormal Opened or short-circuited WHT C P AUX. MAIN S R BLK RED Measure the resistance between the terminals with a tester. (Coil wiring temperature0 C ~ 0 C) Indoor fan motor Motor part WHT-BLK BLK-RED Measure the voltage Power ON. Normal 07/09/NV 8/NV 80 ~ 0Ω 76 ~ 9Ω ~ 6Ω 0 ~ 6Ω Abnormal Opened or short-circuited MAIN AUX. FUSE Sensor part BRN-YLW YLW-GRY Normal.5 ~ 5.5V (When fan revolved one time) 0V 5V 0V (Approx.) Abnormal Remain 0V or 5V BLK RED WHT Measure the resistance between the terminals with a tester. (Coil wiring temperature 0 C ~ 0 C) 07NV 09NV MAIN AUX. P BLK REDWHT Outdoor fan motor Vane motor WHT-BLK BLK-RED BLK-YLW YLW-RED 07/09NV 9~6Ω 7~58Ω Normal NV 8NV NV ~ Ω 0 ~ 6Ω 55. ~ 67.6Ω 8 ~ 6Ω 97.9 ~ 0Ω 6.6 ~.6Ω 55.5 ~ 67.8Ω Measure the resistance between the terminals with a tester. (Part temperature0 C ~ 0 C) Normal 07/09/NV 8 ~ 05Ω 8/NV 58 ~ 88Ω Abnormal Opened or short-circuited Abnormal Opened or short-circuited NV 8NV NV MAIN AUX. P Vane motor PNK ORN RED BLK RED ORN WHT MAIN AUX.AUX. C P BLK YLW REDORNWHT ROTOR YLW BLU 50 P INNER PROTECTOR

51 A Check of indoor fan motor Inodoor fan does not operate. Turn OFF power supply. Check connector CN visually. No Are lead wires connected? Yes Is soldered point nomal? No Reconnect the lead wires. Yes Resolder it. Disconnect lead wires from connector CN on indoor electronic control P.C. board. Measure resistance between lead wires No. and No. and then No. and No.(MSH-8/) No. and No. and then No. and No.(MSH-07/09/) { } Is resistance 0 (short circuit) or (open circuit)? Yes ( 0 or ) Repair the indoor fan motor. No (others) Replace the indoor electronic control P.C. board. B Check of receiver P.C. board Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller. Check the model name of remote controller. Is LCD display on remote controller visible? Yes Remove batteries and then set them back. Check if the unit operates with remote controller. No (not clear) Replace the batteries.(see page 7.) Does the unit operate with remote controller? No Turn on a radio to AM and press switch on remote controller. Yes OK Is noise heard from radio? No Replace the remote controller. Yes Are there any fluorescent lights of inverter or rapid-start type within the range of m? Yes Re-install the unit away from lights. Attach a filter on receiving part. No { } Measure the voltage between receiver P.C. board connector No. (+) and No.(MSH-8/) indoor electronic control P.C. board connector LD0 No. and JPG(MSH-07/09/) when remote controller button is pressed. Is the voltage approx. V DC? No(5V or 0V DC) Replace the receiver. Yes Replace the indoor electronic control P.C. board. 5

52 C Check of indoor electronic control P.C. board The unit doesn t operate with the remote controller. Also, the OPERATION INDICA- TOR lamp doesn t light up by pressing the EMERGENCY OPERATION switch. Replace the fuse. Yes Trouble of indoor electronic control P.C. board. Is fuse(f)blown? No Yes Check both parts side and pattern side of indoor electronic control P.C. board visually. Be sure to check both fuse and varistor in any case..pull out power supply cord..measure resistance between CN0 on indoor electronic control P.C. board and N on the terminal block with a tester. Is there resistance? (Approx.0Ω) No Trouble of fuse(f) Is varistor(nr)burnt? No 07/09NV CN0 Yes Replace the varistor. /8NV CN0 NV CN0 D Check of outdoor unit Compressor and outdoor fan do not operate.(only indoor fan operates.) NF F F F L N Terminal block L N Terminal block L N Terminal block Start Press EMERGENCY OPERATION switch. -minute time delay works. Test run operation operates for 0 minutes. NV Is voltage applied to fan motor and compressor relay normal when you look at checkpoints about outdoor DEICER P.C.borad? No Replace DEICER P.C.board Check voltage to terminal block of outdoor unit. Is there AC0-0V to terminal block between - N? Yes 07/09//8NV Yes No Check the outdoor DEICER P.C.board at first, then check the outdoor fan motor and the compressor. Check voltage to terminal block of indoor unit. Is there AC0-0V to terminal block between - N? Yes 07/09//8NV No NV Check the continuity of indoor and outdoor unit connection. Replace the indoor electronic control P.C. board. Confirm wiring connection at indoor terminal block. 5

53 E How to check mis-wiring and serial signal error (when outdoor unit does not work) MSH-07NV MSH-09NV MSH-NV MSH-8NV Start. Turn OFF power supply.. Turn ON power supply.. Press EMERGENCY OPERATION switch. min. later, when relay 5C turns ON, what self-check result is displayed on OPERATION INDICATOR lamp on indoor unit? Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self-check to be displayed in seconds. Serial signal error is indicated. (0.5-sec.ON,.5-sec.OFF) Repair wiring. Yes Mis-wiring is indicated.(0.5-sec.on, 0.5-sec.OFF) Is there mis-wiring, poor contact, or wire disconnection? No. Turn OFF power supply and disconnect in-out connecting wire on indoor side.. Short-circuit between indoor terminal block N and. Turn ON power supply and press EMERGENCY OPERATION switch. Is there 0V DC between both ends of R when relay (5C) turns ON? ( By tester, the stylus is between 0 ~ 0V. ) No Replace the indoor electronic control P.C. board. Yes Turn OFF power supply. Connect ON in-out connecting wire. Turn ON power supply. minutes later, when EMERGENCY OPERATION switch is pressed and 5C relay turns ON, is there AC 0-0V between outdoor terminal block - N? No Rectify in-out connecting wire. Yes Under the same condition as minutes later, when EMERGENCY OPERATION switch is pressed and 5C relay turns on, is there DC 5V between J8 + -J7? Yes Under the same condition as minutes later, when EMERGENCY OPERATION switch is pressed and 5C relay turns on, is there DC 0V between both ends of R60? (By tester, the stylus is between 5 ~0V) Yes No No Check and rectify fuse and varistor on outdoor DEICER P.C. board. Rectify in-out connecting wire. Replace the outdoor DEICER P.C. board. 5

54 E How to check mis-wiring and serial signal error (when outdoor unit does not work) MSH-NV Start. Turn OFF power supply.. Turn ON power supply.. Press EMERGENCY OPERATION switch. min. later, what self-check result is displayed on OPERATION INDICATOR lamp on indoor unit? Short circuit of JPG and JPS on the indoor electronic control P.C. board enables self-check to be displayed in seconds. Serial signal error is indicated. (0.5-sec.ON,.5-sec.OFF) Repair wiring. Yes Mis-wiring is indicated.(0.5-sec.on, 0.5-sec.OFF) Is there in-out mis-wiring, poor contact, or wire disconnection? No. Turn OFF power supply and disconnect in-out connecting wire on indoor side.. Short-circuit between indoor terminal block N and. Turn ON power supply and press EMERGENCY OPERATION switch. minutes later,is there DC 0V between both ends of R? ( By tester, the stylus is between 0 ~ 0V. ) No Replace the indoor electronic control P.C. board. Yes Turn OFF power supply. Connect ON in-out connecting wire. Turn ON power supply. Is there AC0~0V between outdoor terminal blocks - N? No Replace in-out connecting wire of and N. Yes minutes later, when EMERGENCY OPERATION switch is pressed is there DC 5V between J8 + -J7 on outdoor DEICER P.C. board? No Check and rectify fuse and varistor on outdoor DEICER P.C. board. Yes minutes later, when EMERGENCY OPERATION switch is pressed and 5C relay turns on, is there DC 0V between both ends of R60? (By tester, the stylus is between 5 ~0V) No Replace in-out connecting wire. Yes Replace the outdoor DEICER P.C. board. 5

55 TEST POINT DIAGRAM AND VOLTAGE MSH-8NV - E Indoor electric control P.C.board } Fan motor power supply Fuse AC50V.5A } + -- Power supply input AC 0-0V } R DC 0 ~0V + C -- C } DC5V Room temperature thermistor(rt) Indoor coil thermistor(rt) Timer short mode point Emergency operation switch -- + JPG JP } DCV 55

56 MUH-8NV - E Outdoor deicer P.C. board Outdoor fan motor AC 0-0V Reversing valve coil AC 0-0V R60 DC5~0V } -- + INPUT AC 0-0V Defrost thermistor(rt6) } } DEICER P.C. BOARD } } Fuse A/50V Defrost interval time short pin } + J8 -- J7 DC5V } DCV } 5C DCV Defrost termination temperature change. Jumper wire JPC and JPE 56

57 TEST POINT DIAGRAM AND VOLTAGE MSH-07NV - E MSH-09NV - E MSH-NV - MSH-07NV - E MSH-09NV - E MSH-NV - Indoor electronic control P.C. board E E } Power supply input AC 0-0V CN0 No Varistor(NR) Fuse AC50V.5A Room temperature thermistor(rt) Indoor coil thermistor(rt) Time short mode point R Indoor coil thermistor(rt) Room temperature thermistor(rt) DC0~0V P.C.board 57

58 TEST POINT DIAGRAM AND VOLTAGE MSH-NV - E MSH-8NV - E MSH-NV - E MSH-8NV - E Fan motor power supply Fuse AC 50V.5A } Power supply input AC 0-0V + C } DC5V C Room temperature thermistor(rt) Indoor coil thermistor(rt) JPS Time short mode point JPS Emergency operation switch JPG DCV +} JP R DC0~0V P.C.board 58

59 MUH-07NV - E MUH-09NV - E MUH-NV - MUH-NV - E MUH-07NV - E MUH-09NV - MUH-NV - E MUH-8NV - E MUH-NV - MUH-8NV - E Outdoor deicer P.C. board E E E Outdoor fan motor AC 0-0V } Reversing valve coil AC 0-0V } R60 DC5~0V } + DEICER P.C. BOARD INPUT AC 0-0V } } Defrost thermistor(rt6) Fuse A/50V Defrost interval time short pin + J9 J8} DC5V + } DCV + } 5C DCV Defrost termination temperature change. Jumper wire JPC and JPE 59

60 DISASSEMBLY INSTRUCTIONS NOTE: On the wiring diagram shows the terminals with a lock mechanism, so it cannot be removed when you pull the lead wire Be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger. Slide the sleeve. ➁ Pull the wire while pushing the locking lever. - MSH-07NV - E MSH-09NV - E MSH-NV - MSH-07NV - E MSH-09NV - E MSH-NV - INDOOR UNIT OPERATING PROCEDURE. Removing the front panel () Remove the screws caps of the front panel. Remove the screws. () Pull the panel down to your side slightly and unhook the catches at the top. E E Photo PHOTOS Front panel Screw. Removing the electronic control P.C. board and the display P.C. board. () Remove the front panel. (Refer to ) () Remove the screw of the electrical cover. Remove the electrical cover. () Disconnect the room temperature thermistor and the connector from the indoor coil thermistor. () Remove the terminal cover. Remove the screw of the terminal block. (5) Remove the cord clamp. (6) Disconnect all the connectors on the electronic control P.C. board. (7) Remove the screw of the ground wire. (8) Disconnect the white lead wire and the brown lead wire from 5C relay. (9) Remove the electronic control P.C. board and the display P.C. board. Photo Room temperature thermistor connector Ground wire screw Cord clamp Terminal block cover Indoor electronic control P.C.board Terminal block cover screw 60

61 OPERATING PROCEDURE. Removing the electrical box () Remove the front panel. (Refer to ) () Remove the electrical cover. () Disconnect the connector of the indoor coil thermistor. () Disconnect the motor connector (CN and CN) and the vane motor connector (CN5) on the electronic control P.C. board. (5) Unhook the catches (both upper and lower), remove the electrical box. Photo PHOTOS Catch. Removing the vane motor () Remove the front panel. () Remove the screw of the vane motor, disconnect the connector. () Remove the vane motor. Photo Vane motor screw Drain hose Vane motor 5. Removing the line flow fan and the indoor fan motor () Remove the front panel. (Refer to ) () Disconnect the connector from the vane motor. () Pull out the drain hose from the nozzle assembly, remove the nozzle assembly. () Lifting the left side of the heat exchanger, remove the electrical box. (5) Remove the fixture of the fan motor. (6) Remove the hexagon socket set screws. (7) Remove the line flow fan and the fan motor. Photo 5 Fan motor catches Fan motor fixture Indoor coil termistor 6

62 - MSH-8NV - E MSH-NV - E MSH-8NV - E MSH-NV - MSH-8NV - E INDOOR UNIT E OPERATING PROCEDURE. Removing the front panel () Remove the screw caps at the down of the front panel. Remove the screws. () Pull the panel down to your side slightly and unhook the catches at the top. Photo PHOTOS Front panel Screws. Removing the electronic control P.C. board () Remove the front panel. (Refer to ) () Remove the electrical cover. () Remove the screw, remove the terminal cover. () Remove the screw of terminal block. (5) Unhook the catch of the lamp holder. (6) Remove the receiver holder. (7) Disconnect the connectors and the lead wire from 5C relay on the electronic control P.C. board and remove the ground and the indoor coil thermistor. (8) Remove the electronic control P.C. board. Photo Ground Indoor coil thermistor Screw Terminal block screw Indoor electronic control P.C. board 6

63 OPERATING PROCEDURE. Removing the electrical box () Remove the front panel. (Refer to ) () Remove the electrical cover. () Disconnect the connector of the indoor coil thermistor. () Disconnect the motor connector (CN and CN) and the vane motor connector (CN5) on the electronic control P.C. board. (5) Remove the screw of the electrical box, remove the electrical box. Photo PHOTOS screw screw. Removing the indoor fan motor and the line flow fan () Remove the front panel. () Remove the electrical box. () Unhook the catch on the both sides of the nozzle assembly. () Remove the nozzle assembly. (5) Remove the screws of the bearing support. (6) Remove the screw of the heat exchanger unhook the catch. (7) Lifting the heat exchanger, remove the bearing support. (8) Remove the motor support. (9) Loose the screw fixing the line flow fan, remove the line flow fan. (0) Remove the screws of the motor band, remove the fan motor. Photo Catch Heat exchanger screw Bearing support screws Heat exchanger Photo 5 Indoor fan motor Fan motor screws Line flow fan Motor band 6

64 - MUH-07NV - E MUH-09NV - E MUH-07NV - E MUH-09NV - OUTDOOR UNIT E OPERATING PROCEDURE PHOTOS. Removing the cabinet () Remove the top panel. () Remove the cabinet Photo Photo Screw for top panel Screw for service panel Service panel Screw for top panel Screws for cabinet Screws for cabinet. Remove the deicer P.C. board () Remove the top panel, the service panel and the cabinet. () Disconnect all the connectors and the terminals on the deicer P.C. board. () Remove the deicer P.C. board. Photo Deicer P.C board. Removing the propeller fan () Turn the propeller nut clockwise to remove. () Pull the propeller fan toward you to remove. Photo Propeller fan Propeller nut 6

65 OPERATING PROCEDURE. Removing the outdoor fan motor () Remove the screws securing the outdoor fan motor. () Remove the lead clamps. () Disconnect the capacitor terminal and wire of the terminal. () Pull out the outdoor fan motor. Photo 5 PHOTOS Outdoor fan motor set screws Lead fxture Outdoor fan motor 5. Removing the compressor () Remove the lead clamps. () Remove the screws securing the relay panel. () Remove the screw securing the service port. () Remove the terminal cover. (See Photo 7.) (5) Pull out the lead from the compressor terminal. (6) Remove the overcurrect relay. (7) Remove the compressor nuts. (8) Detach the suction pipe welded section and discharge pipe welded section with a burner. NOTE Before using a burner, purge gas from the pipes until the pressure gauge shows 0 kg/cm. Use the burner under the condition that gas can be released even when the inner pressure rises by heat. Photo 6 Relay panel Photo 7 Photo 9 Terminal cover Compressor Discharge pipe Photo 8 Suction pipe Sound proof felt Compressor nuts 65

66 - MUH-NV - E MUH-8NV - E MUH-NV - E MUH-8NV - MUH-8NV - E OUTDOOR UNIT OPERATING PROCEDURE E PHOTOS. Removing the cabinet () Remove the screws of the cabinet. () Hold the down of the cabinet on the both side to remove the cabinet. Photo Photo Screws Screws Service panel. Removing the deicer P.C. board () Remove the service panel and the cabinet. () Disconnect all the connectors and the terminals on the deicer P.C. board. () Remove the deicer P.C. board. Photo Screws Deicer P.C. board Compressor Red lead wire White lead wire Black lead wire Terminal block 66

67 OPERATING PROCEDURE. Removing the outdoor fan motor () Remove the cabinet. (Refer to ) () Disconnect the connector remove the clamp of fan motor lead wire. () Remove the propeller nut and remove the propeller. () Remove screws securing the fan motor. Photo propeller fan Outdoor fan motor PHOTOS Set screws for outdoor fan motor Lead clamps Propeller fan nut Set screws for outdoor fan motor. Removing the compressor () Remove the cabinet. (Refer to ) () Remove the soundproof felt. () Remove the terminal cover on the compressor () Remove the electrical assembly. (Refer to ) (5) Release gas from the refrigerant circuit. (6) Disconnect the welded part of the discharge pipe. (7) Disconnect the welded part of the suction pipe. (8) Remove nuts fixing the compressor. (9) Remove the compressor. Photo 5 Discharge pipe Terminal cover Suction pipe Compressor Compressor nuts 67

68 -5 MUH-NV- E MUH-NV- E OUTDOOR UNIT OPERATING PROCEDURE PHOTOS. Removing the electrical parts () Remove the screws and the top panel. () Remove the screw of the cover panel. To remove the cover panel, pull it toward you and unhook the catches from the side panel. () Remove the screw of the service panel. To remove the service panel, pull it down toward you and unhook the catches on the both sides. Photo Screws Top panel Service panel Panel cover Front panel Photo Outdoor controller board Transformer Capacitor Contactor Overcurrent relay Screws Terminal block. Removing the fan motor () Remove the screws of the front panel. Open the front panel to a 5-degree angle. Then lift it and unhook the catches to remove. () Remove the propeller nut and the propeller fan. () Remove the screws and the fan motor. Disconnect the lead connectors. Photo Propeller fan Motor support Separator support Lead connectors Valve bed Propeller nut 68

69 OPERATING PROCEDURE. Removing the heat exchanger and the compressor () Remove the rear panel.remove the valve bed, and open the rear panel to the rear to remove. NOTE : All panels are fixed by catches, and must be removed by shifting up and down. () Remove the screws of the right side panel and remove it. () Remove the screws of the rear guard and remove it. () Remove the screws of the separator support plate and remove it. (5) Remove the screws of the motor support and remove it. (6) Remove the screws of the valve bed. The valve bed is fixed by the catches on the right and left sides. Lift it to remove. (7) Remove the electrical parts box. Disconnect the connectors from the high pressure switch, crank case heater, shell thermo, and fan motor lead. (8) Remove the screws of the separator and remove it. (9) Remove the screws of the heat exchanger and remove it. Detach the welded point of pipe. (0) Remove the nuts of the compressor and remove it. Detach the welded points of the compressor suction pipe and discharge pipe. Photo Screws Photo 5 Accumulator PHOTOS Screws Heat exchanger Photo 6 Charge plug Ball valve Compressor 69

70 PARTS LIST INDOOR UNIT STRUCTURAL PARTS MSH-07NV - E (WH) MSH-09NV - E (WH) MSH-NV - E (WH) MSH-07NV - E (WH) MSH-09NV - E (WH) 6 MSH-NV - E (WH) 5 Optional parts NO. Part No. Part Name Symbol in Wiring MSH-07NV- E Diagram (WH) E E FRONT PANEL(WH) FRONT PANEL(WH) E E E FRONT PANEL(WH) GRILL(WH) AIR FILTER E0 5 BOX(WH) E0 66 BOX(WH) 5 6 E E INSTALLATION PLATE SCREW CAP(WH) INDOOR UNIT HEAT EXCHANGER MSH-07NV - E (WH) MSH-09NV - E (WH) MSH-NV - E (WH) MSH-07NV - E (WH) MSH-09NV - E (WH) MSH-NV - E (WH) MSH-07NV- E (WH) Q'ty/unit MSH-09NV- E MSH-09NV- E (WH) (WH) MSH-NV- E (WH) MSH-NV- E (WH) Remarks PC/SET PCS/SET Symbol NO. Part No. Part Name in Wiring MSH-07/09NV- Diagram (WH) E E INDOOR HEAT EXCHANGER UNION(GAS) E E INDOOR HEAT EXCHANGER UNION(GAS) E UNION(LIQUID) Q'ty/unit E E MSH-NV- (WH) E E Remarks {9.5 {.7 {6.5 70

71 INDOOR UNIT ELECTRICAL PARTS MSH-07NV - E (WH) MSH-09NV - E (WH) MSH-NV - E (WH) MSH-07NV - E (WH) MSH-09NV - E (WH) MSH-NV - E (WH) Part number that are circled is not shown in the illustration. Symbol Q'ty/unit NO. Part No. Part Name in Wiring Diagram MSH-07NV- (WH) E E MSH-09NV- (WH) E E MSH-NV- (WH) E E E E0 70 E0 5 0 E E E0 5 0 E E E E E E E E E0 7 8 E E E E NOZZLE(WH) VANE(WH) DRAIN HOSE VANE MOTOR INDOOR FAN MOTOR RUBBER MOUNT LINE FLOW FAN BEARING MOUNT ROOM TEMPERATURE THERMISTOR INDOOR COIL THERMISTOR TERMINAL BLOCK ELECT CONTROL P.C.BOARD ELECT CONTROL P.C.BOARD ELECT CONTROL P.C.BOARD POWER SUPPLY CORD FUSE VARISTOR SLEEVE BEARING RECEIVER FAN GUARD MV MF RT RT TB F NR E Remarks RCV9 - PCS/SET.5A 7

72 OUTDOOR UNIT STRUCTURAL PARTS MUH-07NV - E MUH-09NV - E MUH-07NV - E MUH-09NV - E Part number that are circled is not shown in the illustration. 6 NO Part No. E0 096 E E E E E E E E E E E E0 5 6 E E E E0 97 E E Part Name CABINET TOP PANEL FAN GUARD SERVICE PANEL OUTDOOR HEAT EXCHANGER COMPRESSOR COMPRESSOR COMPRESSOR RUBBER SET BASE STOP VALVE(LIQUID) STOP VALVE(GAS) MOTOR SUPPORT CHECK VALVE REVERSING VALVE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE Symbol in Wiring Diagram MC MC Q'ty/unit MUH-07NV - E E MUH-09NV - E E Remarks RH-7VGHT RH-5VGHT { 6.5 { 9.5 {.0 {.6 00 {.0 {. 800 {.0 {.6 00 {.0 {. 850 {.0 {

73 OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS MUH-07NV - E MUH-09NV - E MUH-07NV - E MUH-09NV - E 5 6 Part number that are circled is not shown in the illustration. NO Part No. E E E E E E E Part Name PROPELLER FAN OUTDOOR FAN MOTOR COMPRESSOR CAPACITOR TERMINAL BLOCK DEFROST THERMISTOR DEICER P.C. BOARD REVERSING VALVE COIL Symbol in Wiring Diagram MF C TB RT6 S Q'ty/unit MUH-07/09NV- E E Remarks RA6V9-5+/0VAC 7

74 OUTDOOR UNIT STRUCTURAL PARTS MUH-NV - E MUH-NV - E Part number that are circled is not shown in the illustration. NO Part No. E0 5 E0 E0 0 E0 5 E E E E0 900 E E E E E0 50 E0 0 E E0 0 7 E0 9 0 E0 0 5 E E E0 97 E0 5 6 Part Name GRILL CABINET ASSEMBLY BACK PANEL SERVICE PANEL COMPRESSOR RUBBER SET MOTOR SUPPORT OUTDOOR HEAT EXCHANGER COMPRESSOR BASE STOP VALVE(LOQUID) STOP VALVE(GAS) REVERSING VALVE PROPELLER FAN OUTDOOR FAN MOTOR COMPRESSOR CAPACITOR TERMINAL BLOCK DEFROST THERMISTOR DEICER P.C. BOARD REVERSING VALVE COIL CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE Symbol in Wiring Diagram MC MF CI TB RT6 S Q'ty/unit MUH-NV - E E Remarks RUBBER RH-VHAT { 6.5 {.7 RA6V0-0+/0VAC {.0 {. 500 {.0 {

75 INDOOR UNIT STRUCTURAL PARTS MSH-8NV - E (WH) MSH-NV - E (WH) MSH-8NV - E (WH) MSH-NV - E (WH) MSH-8NV - E (WH) 5 Optional parts 6 Part number that are circled is not shown in the illustration. NO. Part No. Part Name Symbol in Wiring Q'ty/unit MSH-8NV- MSH-NV- Diagram E FRONT PANEL(WH) E GRILLE(WH) E0 BOX(WH) E0 00 AIR FILTER 5 E0 970 INSTALLATION PLATE 6 E0 067 SCREW CAP(WH) E LAMP PANEL(WH) 7 E0 007 LAMP PANEL(WH) E (WH) E E (WH) E E (WH) Remarks PC/SET PCS/SET INDOOR UNIT HEAT EXCHANGER PARTS MSH-8NV - E (WH) MSH-NV - E (WH) MSH-8NV - E (WH) MSH-NV - E (WH) MSH-8NV - E (WH) NO. Part No. E0 60 E E E Part Name INDOOR HEAT EXCHANGER UNION(LIQUID) UNION(LIQUID) UNION(GAS) Symbol in Wiring Diagram Q'ty/unit MSH-8NV- E E E (WH) MSH-NV- E E (WH) Remarks {6.5 {9.5 {

76 INDOOR UNIT ELECTRICAL PARTS MSH-8NV - E (WH) MSH-NV - E (WH) MSH-8NV - E (WH) MSH-NV - E (WH) MSH-8NV - E (WH) Part number that are circled is not shown in the illustration. NO Part No. E0 5 E0 00 E0 70 E0 00 E0 00 E E E E E E0 50 E0 0 E0 0 E0 8 9 E0 509 E E E E E0 68 E E E E0 7 8 E Part Name NOZZLE(WH) VANE(WH) DRAIN HOSE INDOOR FAN MOTOR INDOOR FAN MOTOR RUBBER MOUNT POWER SUPPLY CORD POWER SUPPLY CORD ELECT CONTROL P.C. BOARD ELECT CONTROL P.C. BOARD ELECT CONTROL P.C. BOARD LINE FLOW FAN VANE MOTOR DISPLAY P.C. BOARD BEARING MOUNT TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK VARISTOR RECEIVER P. C. BOARD SLEEVE BEARING INDOOR COIL THERMISTOR ROOM TEMPERATURE THERMISTOR FUSE FAN GUARD Symbol in Wiring Diagram MF MF MV TB TB TB NR RT RT F Q'ty/unit MSH-8NV- MSH-NV- E E E E E (WH) (WH) (WH) (WH) Remarks RAV7 -EA RAV7 -EC PCS/SET.5A

77 OUTDOOR UNIT STRUCTURAL PARTS MUH-8NV - E MUH-8NV - E MUH-8NV - E Part number that are circled is not shown in the illustration NO Part No. E0 E0 5 E0 5 E E E E E0 0 E0 50 E E E0 9 7 E E E E E E E0 0 E E0 9 5 E E0 9 0 E E E0 8 8 Part Name CABINET GRILLE SERVICE PANEL OUTDOOR HEAT EXCHANGER MOTOR SUPPORT COMPRESSOR BASE OUTDOOR FAN MOTOR PROPELLER FAN COMPRESSOR CAPACITOR CONTACTOR TERMINAL BLOCK TERMINAL BLOCK CAPILLARY TUBE CAPILLARY TUBE COMPRESSOR RUBBER SET STOP VALVE(LIQUID) STOP VALVE(GAS) BACK PANEL FUSE DEICER P.C. BOARD DEICER P.C. BOARD DEFROST THERMISTOR REVERSING VALVE COIL REVERSING VALVE SURGE ABSORBER Symbol in Wiring Diagram MC MF C 5C TB TB F6 RT6 S DSAR E Q'ty/unit MUH-8NV- E E Remarks NH-6VMDT RA6V50-50+/0V {.0 { {.0 { { 6.5 {

78 OUTDOOR UNIT STRUCTURAL PARTS MUH-NV- E MUH-NV- E