Page 1: Service Manual
INDOOR UNIT controller 9. REFRIGERANT SYSTEM DIAGRAM ··············51 10. MICROPROCESSOR CONTROL ····················54 11. SERVICE FUNCTIONS·····································72 12. TROUBLESHOOTING······································75 13. DISASSEMBLY INSTRUCTIONS···················101 14. PARTS LIST····················································114 Indication of 15. OPTIONAL PARTS·········································126 model name The Slim Line. From Mitsubishi Electric. MUH15TN MUH15TN MUH15TN OUTDOOR UNIT...
Page 2 TEMPERATURE 11. SERVICE FUNCTIONS 11-2. CHANGE IN DEFROST SETTING(P.72) FINISH 38˚F 50˚F TEMPERATURE MUH09TW MUH09TW - MSH09TW MSH09TW - MUH12TN MUH12TN- MUH12TN- LCD wireless remote controller MSH12TN - MSH12TN MSH15TN - MSH15TN MSH17TN -...
Page 3 It has a liquid crystal display which indicates such information as mode, fan speed and temperature selected as well as the programmed ON/OFF timer. It is also equipped with “I Feel Control”, a unique Mitsubishi Electric fea- ture that allows the user to adjust the temperature to exactly the level he or she wants simply by tapping the button that describes present conditions : “Too Cool”...
Page 4 MXZ30TN MXZ30TN2 HSPF(4 4 ) Model Cooling capacity Heating capacity SEER 28,400Btu/h 28,600Btu/h MXZ30TN MXZ30TN2 11.0 (4,160 - 30,500) (5,790 - 38,000) Inverter Technology Outdoor unit uses inverter compressor technology (Variable Frequency Drive) to provide exceptional indoor high-speed cooling and heating. By responding to indoor temperature changes, the system reduces power consumption by varying the compressor speed for extra energy savings and performs only to the levels needed to maintain a constant and comfortable indoor environment.
Page 5: Technical Changes
1. Only model name has changed. MUH17NN2 MUH17TN 1. Valve type has changed (Size for connecting pipe is the same). MSH09NW2 - MSH09TW - 1. Indoor unit has changed. 2. Remote controller has changed. MSH12NN2 - MSH12TN - 1. Remote controller has changed.
Page 6 MXZ30TN MXZ30TN2 1. Noise filter P.C. board has changed to improve the capacity for protecting the inverter-controlled circuit when the voltage higher than the rated one is aupplied with the inverter-controlled circuit. 2. Noise filter P.C. board for “MXZ30TN” and “MXZ30TN2” are not interchangeable. 3.
Page 7: Part Names And Functions
PART NAMES AND FUNCTIONS INDOOR UNIT MSH09TW MSH09TW - MSH12TN MSH12TN - MSH15TN MSH15TN - Grille MSH17TN MSH17TN - Deodorizing filter(option) Air inlet (gray sponge type) Air cleaning filter(option) (white bellows type) Remote control receiving section Front panel Model indication...
Page 8 OUTDOOR UNIT MUH15TN MUH15TN - MUH17TN MUH17TN - MUH09TW MUH09TW - MUH15TN - MUH12TN MUH12TN - MUH12TN - Air inlet (back and side) Piping Drain hose Air outlet Drain outlet MXZ30TN MXZ30TN2 (back and side) Air inlet Model indication Air outlet...
Page 9: Remote Controller
REMOTE CONTROLLER MSH09TW - MSH09TW MSH12TN - MSH12TN MSH15TN - MSH15TN MSH17TN - MSH17TN Signal transmitting section Operation display section OPERATE /STOP (ON /OFF)button ON/OFF WARM COOL TEMPERATURE buttons Open the front lid. CLOCK ON/OFF WARM COOL FAN SPEED CONTROL button...
Page 10: Indoor Units Combination
INDOOR UNITS COMBINATION MXZ30TN MXZ30TN2 NOTE: Electrical data is for outdoor unit only. Cooling capacity (BTU/h) Outdoor unit Current Power Indoor units power consumption factor combination Total Unit A Unit B Unit C 208V 230V 8,800 1,030 8,800 – – (4,160~9,210) (510~1,280) 12,900...
Page 11: Specifications
SPECIFICATIONS Model MSH09TW - MSH09TW Item Cooling 8,800 Btu/h Heating 47 10,500 Capacity Btu/h Heating 17 5,300 Btu/h Cooling Power Heating 47 consumption Heating 17 [SEER] Cooling 9.9 [10.0] 6.8 (5.9) HSPF IV(V) Heating Heating 3.46 MSH09TW MSH09TW - INDOOR UNIT MODEL...
Page 12 Model MSH12TN MSH12TN - MSH15TN Item MSH15TN - Btu/h Cooling (208/230V) 12,600/12,900 14,300/14,600 Capacity Btu/h Heating 47 (208/230V) 13,000/13,500 14,500/14,800 Btu/h Heating 17 (208/230V) 6,800/7,000 8,700/8,900 1,280/1,310 1,350/1,380 Cooling (208/230V) Power Heating 47 (208/230V) 1,180/1,250 1,250/1,300 consumption 1,110/1,140 1,210/1,240 Heating 17 (208/230V) [SEER] Cooling...
Page 13 Item Model MSH17TN MSH17TN - Cooling (208/230V) Btu/h 16,000/16,200 Capacity Heating 47 (208/230V) Btu/h 16,800/17,200 Btu/h Heating 17 (208/230V) 10,100/10,300 Cooling (208/230V) 1,560/1,580 Power Heating 47 (208/230V) 1,500/1,570 consumption Heating 17 (208/230V) 1,410/1,510 [SEER] Cooling (208/230V) 10.3/10.3 (10.4/10.4) HSPF IV (V) Heating (208/230V) 6.8/6.8 (5.9/5.9)
Page 14 Additional piping Model Minimum Max. length : ft. Minimum Indoor unit Outdoor unit Outside Outside Wall Wall diameter diameter thickness thickness MSH09TW MSH09TW- [ 3/8 MUH09TW MUH09TW- 0.0285 MSH12TN MSH12TN- MUH12TN MUH12TN- [ 1/2 Gas : 16-15/16 Gas : MUH12TN- 0.0265...
Page 15 Item Model Triple-Unit Double-Unit Single-Unit Cooling Btu/h 28,400/(9,940~30,500) Capacity Heating 47 Btu/h 28,600/(9,040~38,000) Heating 17 Btu/h (18,100) Cooling 3,800/(810~4,610) Power Heating 47 2,800/(710~3,970) consumption Heating 17 (2,310) [SEER] Cooling 11.0 HSPF IV (V) Heating Heating 3.08 OUTDOOR UNIT MODEL MXZ30TN MXZ30TN2 External finish Munsell 5Y 8/1 V, phase, Hz...
Page 16 Operating Range MXZ30TN MXZ30TN2 Indoor intake air temperature Outdoor intake air temperature Maximum 95˚FDB, 71˚FWB 115˚FDB Cooling Minimum 67˚FDB, 57˚FWB 67˚FDB Maximum 80˚FDB, 67˚FWB 75˚FDB, 65˚FWB Heating Minimum 70˚FDB, 60˚FWB 17˚FDB, 15˚FWB MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION MXZ30TN MXZ30TN2 Indoor units...
Page 17: Performance Data
DATA MSH09TW - MUH09TW - MSH09TW MUH09TW MSH12TN - MUH12TN - MUH12TN - MSH12TN MUH12TN MSH15TN - MUH15TN - MUH15TN - MSH15TN MUH15TN MSH17TN - MUH17TN - MSH17TN MUH17TN 6-1. PERFORMANCE DATA 1) COOLING CAPACITY (115V) Outdoor intake air DB temperature ( ˚F )
Page 18 10.6 0.93 12.0 0.96 MSH09TW 0.64 0.76 0.85 10.5 0.89 10.8 0.91 12.2 0.94 MSH09TW - 0.61 0.73 0.82 10.8 0.87 11.1 0.88 12.5 0.93 (208V) Outdoor intake air WB temperature ( ˚F ) Indoor air Model ( ˚F ) 0.88...
Page 19 6-2. PERFORMANCE CURVE NOTE : The curves shows peformance under 230V AC. As for under 208V AC, refer to PERFORMANCE DATA on page 17 and 18. MSH09TW - MSH09TW MUH09TW MUH09TW - Cooling SHF at rating condition = 0.70 = 233CFM...
Page 20 MSH12TN MSH12TN - MUH12TN MUH12TN - MUH12TN - Cooling SHF at rating condition = 0.71 = 388CFM Airflow Bypass Factor = 0.15 Outdoor intake air DB temperature (°F) Heating = 452CFM Airflow Outdoor intake air WB temperature (°F)
Page 21 MSH15TN MSH15TN - MUH15TN MUH15TN - MUH15TN - Cooling SHF at rating condition = 0.65 = 367CFM Airflow Bypass Factor = 0.22 Outdoor intake air DB temperature (°F) Heating = 452CFM Airflow Outdoor intake air WB temperature (°F)
Page 22 MSH17TN MSH17TN - MUH17TN MUH17TN - Cooling SHF at rating condition = 0.64 = 413CFM Airflow Bypass Factor = 0.24 Outdoor intake air DB temperature (°F) Heating = 491CFM Airflow Outdoor intake air WB temperature (°F)
Page 23 6-3. Condensing pressure Data is based on the condition of indoor humidity 50%. Air flow should be set to High speed. MSH09TW MSH09TW - (Cooling) (PSIG) (PSIG) 68 70 100 104(°F) 68 70 104(°F) Outdoor ambient temperature Outdoor ambient temperature MSH09TW MSH09TW- Data is based on the condition of outdoor humidity 75%.
Page 24 Data is based on the condition of indoor humidity 50%. MSH12TN MSH12TN- Air flow should be set to High speed. (Cooling) (PSIG) (PSIG) 68 70 104(°F) 68 70 104(°F) Outdoor ambient temperature Outdoor ambient temperature MSH12TN MSH12TN - Data is based on the condition of outdoor humidity 75%. (Heating) Air flow should be set to High speed.
Page 25 Data is based on the condition of indoor humidity 50%. MSH15TN MSH15TN- Air flow should be set to High speed. (Cooling) (PSIG) (PSIG) 68 70 100 104( F) 68 70 100 104( F) Outdoor ambient temperature Outdoor ambient temperature MSH15TN MSH15TN- Data is based on the condition of outdoor humidity 75%.
Page 26 Data is based on the condition of indoor humidity 50%. MSH17TN MSH17TN- Air flow should be set to High speed. (Cooling) (PSIG) (PSIG) 68 70 100 104( F) 68 70 100 104( F) Outdoor ambient temperature Outdoor ambient temperature MSH17TN MSH17TN- Data is based on the condition of outdoor humidity 75%.
Page 27: Standard Operation Data
6-4. STANDARD OPERATION DATA Model MSH09TW MSH09TW - Item Unit Cooling Heating Capacity Btu / h 8,800 10,500 Total — 0.70 – Input 0.89 Indoor unit MSH09TW MSH09TW - Power supply (V, phase, Hz) 115,1,60 Input 0.035 Fan motor current 0.34...
Page 28 Model MSH12TN MSH12TN - MSH15TN MSH15TN - Item Unit Cooling Heating Cooling Heating Capacity (208/230V) Btu / h 12,600/12,900 13,000/13,500 14,300/14,600 14,500/14,800 Total — 0.71 – 0.65 – Input (208/230V) 1.28/1.31 1.18/1.25 1.35/1.38 1.25/1.30 Indoor unit MSH12TN MSH12TN - MSH15TN MSH15TN - Power supply (V, phase, Hz) 115, 1, 60 115, 1, 60...
Page 29 Model MSH17TN MSH17TN - Item Cooling Unit Heating 16,000/16,200 Capacity (208/230V) Btu / h 16,800/17,200 Total — 0.64 – Input (208/230V) 1.56/1.58 1.50/1.57 Indoor unit MSH17TN MSH17TN - Power supply (V, phase, Hz) 115,1,60 Input 0.054 Fan motor current 0.47 Aux.
Page 30 Model MXZ30TN MXZ30TN2 Item Cooling Unit Heating Capacity Btu / h 28,400 28,600 Total — – – Input Outdoor unit MXZ30TN MXZ30TN2 Power supply (V, phase, Hz) 208/230, 1, 60 Electrical circuit Input Comp. current 17.1 12.3 Fan motor current 0.60 Condensing pressure PSIG...
Page 31 6-5. OPERATING RANGE (1) POWER SUPPLY Rating Guaranteed Voltage Model MSH09TW MSH09TW- MSH12TN MSH12TN- Indoor unit MSH15TN MSH15TN- 115V 60Hz 1[ Min. 103V 115V Max. 127V MSH17TN MSH17TN- MUH09TW- MUH09TW MUH12TN- MUH12TN Outdoor unit MUH12TN- MUH15TN Min. 198V 208V 230V Max.
Page 32 (ft./sec.) range (ft.) The air coverage range is the figure up HEAT 15.8 22.3 to the position where the air speed is MSH09TW MSH09TW- 14.9 21.0 1 ft./sec., when air is blown out COOL 12.4 17.6 horizontally from the unit properly at the HEAT 18.2...
Page 33 MXZ30TN MXZ30TN2 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 pro- vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
Page 34 6-9. Capacity and input correction by means of inverter output frequency (OUTDOOR UNIT:MXZ30TN MXZ30TN2) 1. 09-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 12-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency...
Page 35 6-10. Outdoor low pressure and outdoor unit current 1. 09-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2) (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
Page 36 2. 12-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2) (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> 2Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- 3Inverter output frequency : 33Hz ed on indoor unit.
Page 37 4. 15-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2) (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- Inverter output frequency : 33Hz ed on indoor unit.
Page 38 5. 17-class unit in single operation (OUTDOOR UNIT : MXZ30TN MXZ30TN2) (1) COOL operation 1Data is based on the condition of indoor humidity 50% <How to work fixed-frequency operation> Air flow speed : High 1.Set emergency switch to COOL or HEAT.The switch is locat- Inverter output frequency : 33Hz ed on indoor unit.
Page 39: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: inch MSH09TW MSH09TW - 3-5/16 6-5/8 INDOOR UNIT Installation plate Indoor unit 32-3/16 3-1/4 12-13/16 12-13/16 4-5/8 Wall hole [2-9/16 3/16 33-1/2 7-7/16 Installation plate Liquid line [1/4 19-11/16 Gas line [3/8 16-15/16 Air in Insulation [1-7/16 O.D [13/16 I.D...
Page 40: Outdoor Unit
MSH12TN MSH15TN MSH17TN MSH12TN - MSH15TN - MSH17TN - Unit: inch 4holes 7/16 O 13/16 Indoor unit INDOOR UNIT 5-7/8 25-1/2 8-9/16 39-3/16 17-11/16 17-11/16 17-1/4 13-7/8 Wall hole [2-15/16 Installation plate 39-15/16 7-1/2 3/16 Installation plate Liquid line [ 5/16 19-11/16 Gas line [1/2 16-15/16 Air in Insulation [ 1-15/16 O.D...
Page 41 MUH17TN MUH17TN - Unit: inch OUTDOOR UNIT...
Page 42 MXZ30TN MXZ30TN2 Unit: inch OUTDOOR UNIT 2-U-shape notched holes (Base bolt M10) 7-7/8 19-11/16 7-7/8 Base bolt length Rubber cushion Air in Less than Veranda Base Air in Air out 2-15/32 1-13/32 Oval hole (Base bolt M10) 9.52 (flared) 3/8 (B, C unit) 13/32 12-19/32 1-3/8...
Page 43: Wiring Diagram
WIRING DIAGRAM MSH09TW MODEL WIRING DIAGRAM INDOOR UNIT TO OUTDOOR RT12 UNIT CN201 CONNECTING HIC1 RT11 WIRES 12V DC FROM OUTDOOR NR11 UNIT CONNECTING WIRES TRANS TAB12 POWER SUPPLY SR141 115V 1 phase 60Hz LD101T CN211 ELECTRONIC CONTROL P.C. BOARD...
Page 44: Indoor Unit
MSH09TW - MODEL WIRING DIAGRAM INDOOR UNIT RT12 TO OUTDOOR CN201 UNIT HIC1 CONNECTING RT11 WIRES 12V DC FROM OUTDOOR NR11 UNIT CONNECTING WIRES TAB12 TRANS POWER SR141 SUPPLY 115V CN211 1 phase LD101T ELECTRONIC CONTROL P.C. BOARD 60Hz TO OUTDOOR...
Page 45 MSH12TN MSH15TN MSH17TN MODELS WIRING DIAGRAM INDOOR UNIT TO OUTDOOR CN201 RT12 UNIT CONNECTING HIC1 HIC1 WIRES RT11 12V DC LDCOM FROM OUTDOOR LDC11 UNIT CONNECTING LDC12 TAB12 WIRES LDFH SR144 POWER TRANS LDFL SUPPLY SR142 115V LDFM SR143 1 phase LDFVL SR141 60Hz...
Page 46 MUH15TN MUH17TN MODELS WIRING DIAGRAM RT61 OUTDOOR UNIT 21S4 FROM INDOOR UNIT CONNECTING WIRE CN730 CN661 CN721 CN720 FROM INDOOR UNIT CONNECTING WIRES 12V DC CN711 SR61 TAB21 TO INDOOR UNIT CONNECTING WIRES 115V TRANCE 1 phase 60Hz DEICER P.C. BOARD TAB20 POWER DSAR...
Page 47 MUH12TN - MODEL WIRING DIAGRAM RT61 RT63 FROM INDOOR UNIT CONNECTING 21S4 OUTDOOR UNIT WIRE CN730 CN661 CN662 CN721 FROM INDOOR UNIT CONNECTING WIRES 12V DC CN711 SR61 TO INDOOR UNIT CONNECTING TRANS WIRES 115V TAB20 1 phase 60Hz DEICER P.C.BOARD POWER DSAR SUPPLY...
Page 48 MUH12TN - MODEL WIRING DIAGRAM RT61 RT63 OUTDOOR UNIT FROM INDOOR UNIT CONNECTING 21S4 WIRE CN730 CN661 CN662 CN721 FROM INDOOR UNIT CONNECTING WIRES – 12V DC CN711 SR61 TO INDOOR UNIT CONNECTING TRANS WIRES 115V TAB20 1 phase 60Hz DEICER P.C.BOARD POWER DSAR...
Page 49 MXZ30TN MODELS WIRING DIAGRAM OUTDOOR UNIT DS62 DS61 GRN/YLW RED R NOISE FILTER P.C.BOARD GROUND 63H2 POWER SUPPLY 208/230V 1 phase 60Hz LD62 LD61 F911 RELAY P.C. BOARD TAB64 T801 (250V 1A) CN913 CN720 TAB65 CN901 CN902 INDOOR UNIT (A) CT62 1 2 3 4 5 6 INDOOR...
Page 50 MXZ30TN2 MODELS WIRING DIAGRAM OUTDOOR UNIT DS62 DS61 GRN/YLW RED R NOISE FILTER 4 6 BLK P.C.BOARD GROUND 63H2 POWER SUPPLY 208/230V 1 phase 60Hz LD62 LD61 F911 RELAY P.C. BOARD TAB64 T801 (250V 1A) CN913 CN720 TAB65 CN901 CN902 INDOOR UNIT (A) CT62...
Page 51: Refrigerant System Diagram
REFRIGERANT SYSTEM DIAGRAM Unit:inch MUH09TW MUH09TW - MSH09TW MSH09TW - OUTDOOR UNIT INDOOR UNIT Stop valve Muffler Refrigerant pipe [3/8 (with service (Option) port) 4-way (with heat insulator) valve Indoor coil Service thermistor Indoor Outdoor Service port RT12 heat heat...
Page 52 Unit:inch MUH15TN MUH15TN - MSH15TN MSH15TN MUH15TN - INDOOR UNIT OUTDOOR UNIT Refrigerant pipe [5/8 (Option) 4-way (with heat insulator) Muffler valve Indoor coil Stop valve Service thermistor Indoor (with service port RT12 heat Fusible port) Outdoor Distributor plug exchanger Flared connection Strainer heat...
Page 53 MXZ30TN MXZ30TN2 Unit: inch Service port Fusible plug Service Compressor port Discharge High pressure Refrigerant flow in cooling temperature switch 1 Refrigerant flow in heating thermistor High pressure R.V. coil switch 2 Accumulator heating ON Capillary tube CT2 cooling OFF separator O.D.
Page 54: Microprocessor Control
MICROPROCESSOR CONTROL MSH09TW MUH09TW MXZ30TN MSH09TW - MUH09TW - MSH12TN MUH12TN MZX30TN2 MSH12TN - MUH12TN - MUH12TN - MSH15TN MUH15TN MSH15TN - MUH15TN - MUH15TN - MSH17TN MUH17TN MSH17TN - MUH17TN - Once the operation mode are set, the same operation mode can be repeated by simply turning the OPERATE/STOP(ON/OFF) button ON.
Page 55 10-1. “I FEEL CONTROL” OPERATION (1) Press OPERATE/STOP(ON/OFF) button on the remote controller. Initial room temperature mode OPERATION INDICATOR lamp of the indoor unit turns on with a COOL mode of 77˚F or more beep tone. “I FEEL CONTROL” (2) Press OPERATION SELECT button to set “I FEEL CONTROL”. DRY mode of 73˚F to 77˚F Then a beep tone is heard.
Page 56 (5) TEMPERATURE buttons In “I FEEL CONTROL” mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm.
Page 57 —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. By such controls, amount of air flow of indoor unit will be reduced in order to lower humidity without much room tempera- ture drop.
Page 58 <MSH12/15/17> When the compressor is operating, (1) if the temperature of indoor coil thermistor RT12 is less than 64°F or, the indoor fan operates at Very Low. But if the temperature of room temperature thermistor RT11 is 59°F or less, the fan stops. (2) if the temperature of indoor coil thermistor RT12 is more than 72°F, the indoor fan operates at set speed.
Page 59 , MSH12/15TN- ) without the defrosting operation working. b) The defrost thermistor RT61 reads 27˚F or less (MSH09TW, MSH12/15/17TN) / 32°F or less (MSH09TW - MSH12/15/17TN- , MSH12/15TN- c) After releasing the high pressure protection 4 minutes and 15 seconds have elapsed.
Page 60 (HEAT) 5 sec. 5 sec. Compressor R.V. coil Outdoor fan 5. Outdoor temperature control <MSH09TW - , MSH12/15/17TN- , MSH12/15TN- > When the temperature of the ambient temperature thermistor RT63 falls below 19°F, the compressor stops for protecting the unit.
Page 61 10-5. FAN MOTOR CONTROL<MSH09> (1) Rotational frequency feedback control The indoor fan motor is equipped with a rotational frequency sensor, and outputs signal to the microprocessor to feed- back the rotational frequency. Comparing the current rotational frequency with the target rotational frequency (High, Med., Low) the microprocessor controls SR141 and adjusts fan motor electric current to make the current rotational fre- quency close to the target rotational frequency.
Page 62 (7) SWING MODE By selecting SWING mode with the VANE CONTROL button, the horizontal vane swings vertically. The remote controller displays “ ”. (8) Cold air prevention in HEAT operation. When any of the following conditions occurs in HEAT operation, the horizontal vane angle changes to Angle 1 automati- cally to prevent cold air blowing on users.
Page 63 In case of latter normal operation will start. NOTE : Do not press the EMERGENCY OPERATION switch during normal operation. • The following indication applies regardless of shape of the indicator. OPERATION INDICATOR lamp MSH09TW MSH09TW - Press once <Cool> Press again <Heat>...
Page 64 10-9. INVERTER MULTI SYSTEM CONTROL MXZ30TN MXZ30TN2 Output signal Input signal Compressor Compressor Compressor power primary secondary factor current current Indoor unit microprocessor Outdoor unit control microprocessor Drive SSR61 circuit Transistor module Fin temperature thermistor RT65 Accumulator Comp. H.P.S 63H2 Discharge x 61 temperature...
Page 65 10-10. INVERTER MAIN POWER SUPPLY CIRCUIT MXZ30TN MXZ30TN2 10-10-1. Outline drawing of main power supply circuit ELECTRONIC CONTROL P.C. BOARD I.P.M P.C. BOARD DS62 DS61 POWER SUPPLY CT62 NOISE FILTER P.C.BOARD 10-10-2. Outline of main power supply circuit 1. At the start of operation Rush current is generated the instant the electricity is turned on to the main power supply circuit to operate the compressor.
Page 66 4. Elimination of electrical noise Noise filter circuit is formed by L61, and the condenser installed on the noise filter P.C. board. It eliminates the electrical noise (both common mode and normal mode noise) of alternating current power supply supplied to main power supply circuit.
Page 67 10-12. LEV control Linear expansion valve (LEV) is controlled by "Thermostat ON" commands given from each unit. Indoor unit status LEV opening Stop of all indoor unit Opening before stop 500 pulse in 15 minutes When outdoor unit is operating, COOL : 5 pulse (full closed) some indoor units stop and HEAT : 59 pulse (slightly opened)
Page 68 Standard opening COOL HEAT Operation frequency of compressor (Hz) : F Difference in Difference in Standard opening (pulse) capacity operation number Code2 Code3 Code4 COOL HEAT Capacity code Indoor unit 15/17 <Correction> COOL HEAT 1 Suction super heat (MIN gas pipe temperature thermistor - Evaporation temperature thermistor) •...
Page 69 (2) Separate correction (COOL, DRY) (Correction is performed only for operating unit.) (When 2 or more units are operating.) Correction by the separate super heat. Correct the LEV separately by the difference between gas pipe temperature and minimum gas pipe temperature. 1 Calculate super heat using the expression below.
Page 70 10-13. Operational frequency range Note • Limit the maximum frequency by means Number of COOL (Hz) HEAT (Hz) capacity operating of fan speed code (Hz) Min. Max. Rated Min. Max. Defrost Rated unit When all the indoor units in their operation are running in the same operation mode and when their fan speed is set to "Low,"...
Page 71 <Release status> When high-pressure switch is OFF. (When discharge pipe pressure is 340.8 PSIG or more.) Or, the compressor stops. 10-16. Discharge temperature protection control This protection controls the compressor ON/OFF and operation frequency according to temperature of the discharge temp. thermistor.
Page 72: Service Functions
By short circuit of the connector JP607 and R853 on the outdoor deicer P.C. board, defrosting mode can be accom- plished regardless of the defrost interval restriction. (Refer to page 96.) Defrost thermistor RT61 must read below 27°F(MSH09TW,MSH12/15/17TN)/ 32°F(MSH09TW ,MSH12/15/17TN ).
Page 73 <MUH09TW , MUH12/15/17TN , MUH12/15TN > <JPC> When the JPC wire of the deicer P.C. board is soldered, the defrost interval time is changed. <JPE> When the JPE wire of the deicer P.C. board is soldered, the defrost temperature is changed. (Refer to page 96.) Model Jumper wire Change point...
Page 74 Table 1 1 unit operation 2 units operation 3 units operation 4 units operation No. 1 unit No modification Same as at left Same as at left Same as at left No. 2 unit – Solder J1 Same as at left Same as at left No.
Page 75: Troubleshooting
TROUBLESHOOTING MXZ30TN MSH09TW MSH09TW - MUH09TW MUH09TW - MUH12TN - MXZ30TN2 MSH12TN MSH12TN - MUH12TN MUH12TN - MUH15TN - MSH15TN MSH15TN - MUH15TN MUH15TN - MSH17TN MSH17TN - MUH17TN MUH17TN - 12-1. Cautions on troubleshooting 1. Before troubleshooting, check the following: 1) Check the power supply voltage.
Page 76 12-2. Instruction of troubleshooting MSH09TW MUH09TW MSH09TW - MUH09TW - MUH12TN - MSH12TN MUH12TN MSH12TN - MUH12TN - MUH15TN - MSH15TN MUH15TN MSH15TN - MUH15TN - MSH17TN MUH17TN MSH17TN - MUH17TN - Start Indoor unit Indoor unit Indoor unit OPERATION INDICATOR operates.
Page 77 MXZ30TN MXZ30TN2 only • Check the indoor unit with referring to the indoor unit service manual, and confirm that there is any problem in the indoor unit. Then, check the outdoor unit with referring to this page. Operation start Check the outdoor unit LED indicator Display other than "00"...
Page 78 1. Troubleshooting check table MSH09TW MUH09TW MSH09TW - MUH09TW - MUH12TN - MSH12TN MUH12TN MSH12TN - MUH12TN - MUH15TN - MSH15TN MSH15TN - MUH15TN MUH15TN - MSH17TN - MUH17TN - MSH17TN MUH17TN • The following indication applies regardless of shape of the indicatior.
Page 79 MXZ30TN MXZ30TN2 Note . LED indicates "00" in the normal status. 7-segment LED display Error mode Normal If there is defect in the following parts(electronic control P.C. board, relay P.C. board, high pressure switches(63H1,63H2),indoor /outdoor fan motor , or indoor coil thermistor), the compressor may stop even with the display remained at “...
Page 80 When the compressor power factor cannot be detected • Compressor wiring. mality * In this case, the compressor keeps running. (h4) 2. Trouble criterion of main parts MSH09TW MSH09TW - MUH09TW MUH09TW - MUH12TN - MSH12TN MUH12TN MSH12TN - MUH12TN -...
Page 81 MSH09TW MUH09TW MSH09TW - MUH09TW - MUH12TN - MSH12TN MUH12TN MSH12TN - MUH12TN - MUH15TN - MSH15TN MUH15TN MSH15TN - MUH15TN - MSH17TN MUH17TN MSH17TN - MUH17TN - Part name Check method and criterion Figure Measure the resistance between the terminals with a tester.
Page 82 MXZ30TN MXZ30TN2 Part name Figure Check method and criterion Defrost Measure the resistance using a tester. thermistor (Part temperature 14°F ~ 104°F) Evaporation/ Gas pipe temperature Normal abnormal thermistor 5kΩ ~ 55kΩ Open or short-circuit Measure the resistance using a tester, after warming up the thermistor by holding by hand.
Page 83 Indoor fan does not operate. A A Check of indoor fan motor Turn OFF the power supply. Check connector (Fan motor) visually. Is soldered point of the connector Are lead wires connected? correctly soldered? Re-connect the lead wires. Re-solder it. Disconnect lead wires from connector (Fan motor).
Page 84 Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller. w Check if the remote controller is exclusive for this air conditioner. w In case of replacing the receiver P.C. board of MSH09, replace the indoor electronic control P.C. board with it because they are unified. B B Check of remote controller and receiver P.C.
Page 85 The unit doesn’t operate with the remote controller. Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch. C C Check of indoor electronic control P.C. board Check the both “parts side” and “pattern side” of indoor electronic control P.C. board visually.
Page 86 Compressor and/or outdoor fan does not operate. (Only indoor fan operates.) D D Check of outdoor unit Start Operate the unit in COOL or HEAT mode by pressing the EMERGENCY OPERATION switch. 3-minute time delay works. Test run operation operates for 30 minutes. Compressor Rectify the indoor and doesn't operate.
Page 87 When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second or flashes once. Outdoor unit doesn’t operate. F F How to check mis-wiring and serial signal error Start Turn OFF the power supply. Turn ON the power supply. Is the power voltage to terminal blocks of Rectify the wiring.
Page 88 When OPERATION INDICATOR lamp flashes 6-time. Thermistors in the outdoor unit are abnormal. G G Check of outdoor thermistor (MUH09/12/15/17) W Disconnect the connector CN661 from the deicer P.C. board. (Check the characteristics of thermistor.) Replace the deicer P.C. board. Defrost thermistor (RT61) Re-connect CN661.
Page 89 Outdoor unit does not operate. (LED display: display OFF) I I Check of power supply (MXZ30TN MXZ30TN2) Start Check the connecting of main circuit parts and connector (CN501: I.P.M P. C. board, CN 801: Electronic control P. C. board, CN554: relay P. C. board) Turn on power supply Is there voltage of 208V AC - 230V AC Check the power supply cable.
Page 90 The cooling operation or heating operation does not operate. (LED display: 0 0 0 0 ) K K Check of R. V. coil (MXZ30TN MXZ30TN2) • When heating operation does not work. Start 1. Disconnect the lead wire leading to the compressor. 2.
Page 91 •When cooling, heat exchanger of non-operating unit frosts. •When heating, non-operating indoor unit get warm. (LED display: 0 0 0 0 , p p 1 1 ) L L Check of LEV (MXZ30TN MXZ30TN2) Start Turn on power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click"...
Page 92 •When thermistor is abnormal. (When the LED displayis a table below) N N Check of thermistor (MXZ30TN MXZ30TN2) Start Abnormal Disconnect the connector in the electronic control P. C. board (see below table), and Replace the thermistor measure the resistance of thermistor to check whether the thermistor is normal or not. Normal Reconnect the connector (CN661, CN662 and CN663) and disconnect the lead wire leading to the compressor.
Page 93 •When the operation frequency does not go up from lowest frequency. P P Check of HPS (MXZ30TN MXZ30TN2) Start 1. Disconnect the connector CN722 in the electronic control P. C. board. 2. Check the resistance of HPS after 1 minutes have passed since the outdoor unit power supply was turnd off. Infinity Check the resistance between Replace HPS (63H1).
Page 94 TEST POINT DIAGRAM AND VOLTAGE MSH09TW MSH09TW - Indoor electronic control P.C. board Varistor(NR11) Fuse(F11) 250V AC 3A Fan motor Power supply input 115V AC 12V DC Room temperature thermistor(RT11) Timer short mode point (JPS, JPG) (Refer to page 73.)
Page 95 TEST POINT DIAGRAM AND VOLTAGE MSH12TN MSH15TN MSH17TN MSH12TN - MSH15TN - MSH17TN - Indoor electronic control P.C. board Fan motor Very Med. Low High 8 7 5 6 4 Varistor(NR11) Fuse(F11) 250V AC 3.0A CN201 Power supply input 115V AC JP17 12V DC JP16...
Page 96 Defrost thermistor (RT61) MUH09TW MUH09TW - Ambient temperature thermistor (RT63) MUH12TN MUH12TN - MUH12TN - MUH15TN MUH15TN - MUH15TN - MUH17TN MUH17TN - Outdoor deicer P.C. board -4 14 32 50 68 86 104 Temperature(°F) Power supply input Ambient temperature 115V AC(MUH09) thermistor(RT63) is only 208/230V AC(MUH12)
Page 97 TEST POINT DIAGRAM AND VOLTAGE MXZ30TN MXZ30TN2 Gas pipe temperature thermistor Electronic control P.C. board Discharge temperature thermistor Evaporation temperature thermistor Defrost temperature thermistor 32 50 68 86 104 122 140 158 176 194 212 230 248 Temperature(°F) Defrost temperature thermistor 2.5~4.0V DC Discharge temperature thermistor 0.3~0.6V DC...
Page 98 MXZ30TN Noise filter P.C. board 208V-230V AC OUTDOOR FAN OUTPUT 208V-230V AC 208V-230V AC INPUT REVERSING VALVE 208-230V AC MXZ30TN2 Noise filter P.C. board 208-230V AC OUTDOOR FAN OUTPUT 208-230V AC Replace them at the same time 208-230V AC INPUT REVERSING VALVE 208-230V AC...
Page 99 I.P.M P.C. board 12V DC 12V DC 290V-330V DC Relay P.C. board 12V DC High pressure switch 12V DC Short...
Page 100 RELAY OPERATION MSH09TW MSH09TW - MSH12TN MSH12TN - MSH15TN MSH15TN - MSH17TN MSH17TN - 1. COMPRESSOR CONTACTOR • EACH MODE MODE 52C CONTACTOR THERMOSTAT INDOOR FAN SPEED COOL & COOL mode AUTO or set speed of I FEEL CONTROL OFF for 2 min. after AUTO or set speed unit starts operation.
Page 101: Disassembly Instructions
Locking lever lever. Connector 13-1. MSH09TW MSH09TW - INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 (1) Remove the screw caps at the bottom of the front panel.
Page 102 OPERATING PROCEDURE PHOTOS Screw of the ground wire Photo 3 3. Removing the electrical box (1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (Refer to 2) (3) Disconnect the connector of the indoor coil thermistor(CN112). (4) Disconnect the motor connector (CN211 and CN121) and the vane motor connector (CN151) on the electronic control P.C.
Page 103 OPERATING PROCEDURE PHOTOS 5. Removing the line flow fan and the indoor fan motor Photo 6 (1) Remove the front panel. (Refer to 1) (2) Remove the electrical box. (Refer to 3) (3) Pull out the drain hose from the nozzle assembly, remove Screws fix- the nozzle assembly.
Page 104 13-2. MSH12TN MSH15TN MSH17TN MSH12TN - MSH15TN - MSH17TN - INDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the front panel Photo 1 (1) Remove the screw caps at the bottom of the front panel. Remove the screws. Front panel (2) Pull the panel down to your side slightly and unhook the catches at the top.
Page 105 OPERATING PROCEDURE PHOTOS 3. Removing the electrical box Photo 3 (1) Remove the front panel. (Refer to 1) (2) Remove the electrical cover. (3) Remove the connector of the indoor coil thermistor (CN112). (4) Remove the motor connector and the vane motor connector (CN151) on the electronic control P.C.
Page 106 13-3. MUH09TW MUH12TN MUH09TW - MUH12TN - MUH12TN - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 Screws of the front panel (1) Remove the screws of the top panel. and motor support (2) Remove the screw of the service panel. (3) Remove the screws of the cabinet.
Page 107 OPERATING PROCEDURE PHOTOS Photo 5 3. Removing the propeller fan and the outdoor fan motor (1) Remove the cabinet. (Refer to 1.) Lead clamps (2) Remove the propeller fan nut. Screws of the (3) Remove the propeller fan. outdoor fan motor Outdoor Hook NOTE : Loose the propeller fan in the rotating direction for...
Page 108 13-4. MUH15TN MUH15TN - MUH15TN - OUTDOOR UNIT PHOTOS OPERATING PROCEDURE 1. Removing the cabinet Photo 1 (1) Remove the screws of the cabinet. (2) Hold the bottom of the cabinet on the both side to remove the cabinet. Screws of the cabinet Service...
Page 109 OPERATING PROCEDURE PHOTOS 3. Removing the propeller fan and the outdoor fan motor Screws of the Lead Photo 4 Connector (1) Remove the cabinet. (Refer to 1) outdoor fan motor clamp (2) Disconnect the connector and remove the lead clamps of the fan motor lead wires.
Page 110 13-5. MUH17TN MUH17TN - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS Screws of the 1. Removing the cabinet Photo 1 top panel Top panel (1) Remove the screws of the top panel and the top panel. (2) Remove the screw of the service panel. To remove the ser- vice panel, pull it down toward you and unhook the catches on the both sides.
Page 111 OPERATING PROCEDURE PHOTOS 4. Removing the heat exchanger and compressor Photo 5 Screws (1) Remove the screws of the rear panel. Remove the screws of the valve bed and the valve bed. (The valve bed is fixed by the catches on the right and left sides. Lift it to remove.) Open the rear panel to the rear to remove.
Page 112 13-6. MXZ30TN MXZ30TN2 OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1.Removing the compressor Photo 1 (1)Remove the screws of the service panel, and remove it. Recover refrigerant gas. Top panel (2)Remove the screws of the top panel , and remove it. (3)Remove the screws of the front panel , and remove it. (4)Disconnect the compressor lead wire.(TAB64,TAB65,TAB66) (5)Disconnect the outdoor electronic control P.C.
Page 113 OPERATING PROCEDURE PHOTOS 3.Removing the 4-way valve Photo 4 (1)Remove the screws of the top panel , and remove it. 4 way valve (See Photo 1.) (2)Remove the service panel,rear panel,and connect cover panel.Recover refrigerant gas. R. V. coil (3)Remove the electrical parts.(See Photo 2.) (4)Detach the brazed joint of 4-way valve and pipe.
Page 114: Parts List
PARTS LIST MSH09TW (W) MSH09TW - 14-2. ACCESSORY AND 14-1. INDOOR UNIT STRUCTURAL PARTS REMOTE CONTROLLER Optional parts (See page 126.) 14-1. INDOOR UNIT STRUCTURAL PARTS Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MSH09TW MSH09TW- Diagram E02 408 970...
Page 115 MSH09TW (W) MSH09TW - 14-3. INDOOR UNIT ELECTRICAL PARTS 14-4. INDOOR UNIT HEAT EXCHANGER AND FUNCTIONAL PARTS SLEEVE BEARING ROOM TEMPERATURE THERMISTOR FUSE VARISTOR 14-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration.
Page 116 MUH09TW MUH12TN MUH09TW - MUH12TN - MUH12TN - 14-5. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 13 14...
Page 117 MUH09TW MUH12TN MUH09TW - MUH12TN - MUH12TN - 14-5. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit in Wiring Part No. Part Name Remarks MUH09 MUH09 MUH12 MUH12 MUH12...
Page 118 MSH12TN (W) MSH12TN - MSH15TN (W) MSH15TN - MSH17TN (W) MSH17TN - 14-6. INDOOR UNIT STRUCTURAL PARTS 14-7. ACCESSORY AND REMOTE CONTROLLER Optional parts (See page 126.) 14-6. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Q'ty/unit Symbol in Wiring...
Page 119 MSH12TN (W) MSH12TN - MSH15TN (W) MSH15TN - MSH17TN (W) MSH17TN - 14-8. INDOOR UNIT ELECTRICAL PARTS 14-9. INDOOR UNIT HEAT EXCHANGER AND FUNCTIONAL PARTS SLEEVE BEARING INDOOR COIL THERMISTOR ROOM TEMPERATURE THERMISTOR 14-8. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration.
Page 120 MUH15TN MUH15TN - MUH15TN - 14-10. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS...
Page 121 MUH15TN MUH15TN - MUH15TN - 14-10. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part Name Remarks Part No. in Wiring MUH15TN MUH15TN MUH15TN Diagram BACK PANEL E02 475 233 CABINET E02 141 232...
Page 122 MUH17TN MUH17TN - 14-11. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 19 20 22 23 24...
Page 123 MUH17TN MUH17TN - 14-11. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part No. Part Name Remarks in Wiring MUH17TN MUH17TN- Diagram E02 214 297 TOP PANEL E02 287 309 RT63 AMBIENT TEMPERATURE THERMISTOR...
Page 124 MXZ30TN MXZ30TN2 14-12. OUTDOOR UNIT FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty / unit Parts No. Parts Name in Wiring Remarks MXZ30TN MXZ30TN2 Diagram M21 17A 501 PROPELLER FAN M21 17E 337 REACTOR T2W E88 451 ELECTRONIC CONTROL P.C.
Page 125 MXZ30TN MXZ30TN2 14-13. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty / unit Parts No. Parts Name in Wiring Remarks MXZ30TN Diagram MXZ30TN2 M21 AS2 232 FRONT PANEL M21 17A 245 SERVICE PANEL T92 500 800 COMPRESSOR...
Page 126: Optional Parts
Wall Outside Outside (in.) R22(oz.) thickness thickness diameter diameter MAC-645PI 10ft. MAC-646PI 16ft. MSH09TW MSH09TW - MAC-647PI 23ft. C 1-3/8 0.03 MUH09TW MUH09TW - MAC-648PI 4.29 33ft. MAC-649PI 12.86 49ft. MAC-660PI-US 10ft. MAC-661PI-US 16ft.
Page 128 C C Copyright 2001 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Dec. 2003. No.OB275 REVISED EDITION D 7 Distributed in Feb. 2003. No.OB275 REVISED EDITION C 17 Distributed in Sep. 2002. No.OB275 REVISED EDITION B 23 Distributed in May. 2002. No.OB275 REVISED EDITION A 23 New publication, effective Dec.
Page 129 3400 Lawrenceville Suwanee Road ● Suwanee, Georgia 30024 ● Toll Free: 800-433-4822 Toll Free Fax: 800-889-9904 www.mrslim.com Specifications are subject to change without notice.

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