Instruction/ maintenance manual of the product MUY-GE09NA Mitsubishi Electronics
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SER VICE MANUAL CONTENTS 1. TECHNICAL CHANGES ··································· 2 2. P ART NAMES AND FUNCTIONS ····················· 3 3. SPECIFICA TION ················································ 4 4.
2 MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUY -GE09NA MUY -GE12NA MUY -GE15NA MUY -GE18NA 1. New model 1 TECHNICAL CHANGES.
3 MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY -GE09NA MUY -GE12NA MUY -GE15NA Air outlet Drain outlet Piping Drain hose Air inlet (back and side) MUZ-GE18NA MUY -GE18NA Piping Air outlet Drain hose Drain out.
4 Outdoor unit model MUZ-GE09NA MUY -GE09NA MUZ-GE12NA MUY -GE12NA Capacity Rated (Minimum~Maximum) Cooling 1 Btu/h 9,000 ( 3,800 ~ 12,200 ) 9,000 ( 3,800 ~ 12,200 ) 12,000 ( 3,800 ~ 13,600 ) 12,000 (.
5 Outdoor unit model MUZ-GE15NA MUY -GE15NA MUZ-GE18NA MUY -GE18NA Capacity Rated (Minimum~Maximum) Cooling 1 Btu/h 14,000 ( 3,100 ~ 18,200 ) 14,000 ( 3,100 ~ 18,200 ) 17,200 ( 3,700 ~ 18,700 ) 17,200.
6 T est condition ARI Mode T est Indoor air condition (°F) Outdoor air condition (°F) Dry bulb W et bulb Dry bulb Wet bulb SEER (Cooling) "A-2" Cooling Steady State at rated compressor Spe.
7 Unit: inch MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY -GE09NA MUY -GE12NA MUY -GE15NA Liquid pipe :1/4 (flared) Gas pipe :3/8 (flared) (GE09/12) 1/2 (flared) (GE15) 6-23/32 2 5-7/8 2-23/32 1-3/4 15-3/4 12.
8 MUZ-GE09NA MUZ-GE12NA 5 WIRING DIAGRAM MUY -GE09NA MUY -GE12NA.
9 MUZ-GE15NA MUY -GE15NA.
10 MUZ-GE18NA MUY -GE18NA.
11 Unit: inch MUZ-GE09NA MUY -GE09NA Outdoor heat exchanger Flared connection Defrost thermistor RT6 1 ( MUZ ) Discharge temperature thermistor RT6 2 Flared connection Stop valve (with strainar) Stop .
12 MUZ-GE18NA MUY -GE18NA Outdoor heat exchanger Flared connection Defrost thermistor RT6 1 ( MUZ ) Discharge temperature thermistor RT6 2 Flared connection Stop valve (with strainar) Stop valve (with service port) Capillary tube O.D. 0.142 × I.D. 0.
13 ADDITIONAL REFRIGERANT CHARGE (R410A: oz.) Refrigerant piping exceeding 25 ft. requires additional refrigerant charge according to the calculation. Model Outdoor unit precharged Refrigerant piping length (one way): ft. 25 30 40 50 60 65 MUZ-GE09NA MUY -GE09NA 1 lb.
14 2) COOLING CAP ACITY CORRECTIONS Refrigerant piping length (one way: ft.) 25 (std.) 40 65 MUZ-GE09NA MUY -GE09NA MUZ-GE12NA MUY -GE12NA MUZ-GE15NA MUY -GE15NA MUZ-GE18NA MUY -GE18NA 1.
15 65 70 75 75 70 65 15 14 13 12 11 10 9 8 7 6 5 Indoor intake air DB tem perature (°F) = 413 CFM Airflow 15 52 5 3 5 4 5 5 5 6 5 7 0 Outdoor intake air WB temperature (°F) 0.
16 7-3. CONDENSING PRESSURE Cooling Data is based on the condition of indoor humidity 50 %. Air flow should be set to High speed. MUZ-GE12NA MUY -GE12NA MUZ-GE09NA MUY -GE09NA 68 70 75 80 85 90 95 100.
17 5 1 52 53 54 55 56 5 7 5 (°F) 5 1 52 53 54 55 56 5 7 5 (°F) 60 85 11 0 135 160 185 210 220 245 270 295 320 345 370 Indoor DB temperature (°F) Condensing pressure Outdoor ambient temperature (PSI.
18 MUZ-GE18NA MUZ-GE15NA 5 1 52 53 54 55 56 5 7 5 (°F) 5 1 52 53 54 55 56 5 7 5 (°F) 60 85 11 0 135 160 185 210 260 296 332 368 404 440 Indoor DB temperature (°F) Condensing pressure Outdoor ambien.
19 7-4. ST ANDARD OPERA TION DA T A Model MSZ-GE09NA MSY -GE09NA MSZ-GE09NA MSZ-GE12NA MSY -GE12NA MSZ-GE12NA Item Unit Cooling Heating Cooling Heating T otal Capacity Btu/h 9,000 10,900 12,000 14,400 SHF - 0.82 — 0.74 — Input kW 0.660 0.760 0.960 1.
20 Model MSZ-GE15NA MSY -GE15NA MSZ-GE15NA MSZ-GE18NA MSY -GE18NA MSZ-GE18NA Item Unit Cooling Heating Cooling Heating To t a l Capacity Btu/h 14,000 18,000 17,200 21,600 SHF - 0.80 — 0.71 — Input kW 1.080 1.600 1.640 1.900 Rated frequency Hz 55.5 74.
21 7-5. CAP ACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY Capacity correction factors Input correction factors Input correction factors Capacity correction factors Correction of Cooling capa.
22 MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUY -GE09NA MUY -GE12NA MUY -GE15NA MUY -GE18NA 8-2. R.V . COIL CONTROL (MUZ) Heating . . . . . . . . . . . . . . . . . ON Cooling . . . . . . . . . . . . . . . . . OFF Dry . . . . . . . . . . . . . . . .
23 9-1. CHANGE IN DEFROST SETTING (MUZ) Changing defrost finish temperature <JS> T o change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P .
24 Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (10-3.) disappears, the memorized failure details can be recalled. 10-2. F AILURE MODE RECALL FUNCTION 1.
25 2. Flow chart of the detailed outdoor unit failure mode recall function 2.Blinking pattern when outdoor unit is abnormal: ON OFF No beep Beeps Repeated cycle 2.5-second OFF 3-second ON Blinking at 0.5- second interval No beep Beeps Repeated cycle 2.
26 3. Outdoor unit failure mode table POWER lamp (Indoor unit) Abnormal point (Failure mode / protection) LED indication (Outdoor P .C. board) Condition Remedy Indoor/ outdoor unit failure mode recall function Outdoor unit failure mode recall function OFF None (Normal) —— — — — 2-time fl ash 2.
27 10-3. TROUBLESHOOTING CHECK T ABLE No. Symptom LED indication Abnormal point/ Condition Condition Remedy 1 Outdoor unit does not oper- ate. 1-time fl ash every 2.
28 10-4. TROUBLE CRITERION OF MAIN P ARTS MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUY -GE09NA MUY -GE12NA MUY -GE15NA MUY -GE18NA Part name Check method and criterion Figure Defrost thermistor (RT.
29 10-5. TROUBLESHOOTING FLOW Are the voltages balanced? Disconnect the connector (CN61) between compressor and the intelligent power module (IPM). Replace the inverter P .C. board. Check the voltage between terminals. Check the compressor . See 10-5.
30 F Check of compressor start failure D Check of compressor winding E Check of compressor operation time ● Disconnect the connector (CN61) between the compressor and intelligent power module, and measure the resistance be- tween the compressor terminals.
31 Is the resistance of thermistor normal? (Refer to 10-6.1.) Reconnect the connector of thermistor . T urn ON the power supply and press EMERGENCY OPERA TION switch. No Replace the thermistor except RT64. When R T64 is abnormal, replace the inverter P .
32 I Check of outdoor fan motor Is the resistance of outdoor fan motor normal? (Refer to 10-4.) Replace the outdoor fan motor . Replace the inverter P .C. board. No Ye s Disconnect CN932 from the inverter P .C. board, and measure the resistance of the outdoor fan motor .
33 J Check of power supply Is there voltage 208/230 V AC between the indoor terminal block S1 and S2? No Ye s Replace the indoor electronic control P .
34 Press OPERA TE/ST OP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1 Expansion valve operates in full-opening direction. OK. NOTE : After check of LEV , do the undermentioned operations.
35 L Check of inverter P .C. board Check the outdoor fan motor . (Refer to 10-5. .) Is the fuse (F901) blown on the in- verter P .C. board? Check the connection of the connectors (CN931, CN932) of the outdoor fan motor . If the connection is poor , make it correct.
36 M How to check miswiring and serial signal error T urn OFF inverter-controlled lighting equipment. T urn OFF the power supply and then turn ON again. Press EMERGENCY OPERA TION switch. • • • A Is serial signal error indicated 6 minutes later? B Ye s Reinstall either the unit or the light away from each other .
37 N Electromagnetic noise enters into TV sets or radios Ye s Is the unit grounded? No Ground the unit. Ye s Is the distance between the antennas and the indoor unit within 9.91 ft., or is the distance between the antennas and the outdoor unit within 9.
38 -4 14 32 50 68 86 104 0 10 20 30 40 50 60 70 80 90 100 T emperature(°F) Defrost thermistor(RT61) (MUZ) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) T em.
39 -4 14 32 50 68 86 104 0 10 20 30 40 50 60 70 80 90 100 T emperature(°F) Defrost thermistor(RT61) (MUZ) Ambient temperature thermistor(RT65) Outdoor heat exchanger temperature thermistor(RT68) T em.
40 1 1-1. MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY -GE09NA MUY -GE12NA MUY -GE15NA NOTE : T urn OFF power supply before disassembling. OPERA TING PROCEDURE PHOTOS 1. Removing the cabinet (1) Remove the screw fixing the service panel. (2) Pull down the service panel and remove it.
41 OPERA TING PROCEDURE PHOT OS 2. Removing the inverter assembly , inverter P .C. board (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P .C. board> CN721 (R.V .
42 OPERA TING PROCEDURE PHOT OS 5. Removing outdoor fan motor (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the following connectors: <Inverter P .C. board> CN931, CN932 (Fan motor) (3) Remove the propeller nut. (Photo 7) (4) Remove the propeller .
43 1 1-2. MUZ-GE18NA MUY -GE18NA NOTE: T urn OFF power supply before disassembling. OPERA TING PROCEDURE PHOT OS 1. Removing the cabinet (1) Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover .
44 OPERA TING PROCEDURE PHOT OS 2. Removing the inverter assembly , inverter P .C. board (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following con- nectors: <Inverter P .C. board> CN721 (R.
45 Ambient tem- perature thermistor Outdoor heat exchanger tempera- ture thermistor Defrost thermistor OPERA TING PROCEDURE PHOTOS 4. Removing the discharge temperature thermistor , defrost thermistor , outdoor heat exchanger tempera- ture thermistor and ambient temperature thermistor (1) Remove the cabinet and panels.
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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAP AN © Copyright 2009 MITSUBISHI ELECTRIC CO.,L TD Distributed in Jul. 2009. No. OBH 549 5 Made in Japan New publication, effective Jul. 2009 Specifications subject to change without notice.
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