Mitsubishi Electric Trane NTXSPF09A112AA Service Manual
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Mitsubishi Electric Trane NTXSPF09A112AA Service Manual

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OUTDOOR UNIT
SERVICE MANUAL
Models
NTXSPF09A112AA
NTXSPF12A112AA
NTXSPF15A112AA
NTXSPF18A112AA
NTXSPF09A112AA
NTXSPF12A112AA
Indoor unit service manual
NTXFKS•A112AA Series (OBHT752)
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 3
3. SPECIFICATION ················································ 4
4. OUTLINES AND DIMENSIONS ························ 6
5. WIRING DIAGRAM ············································ 8
6. REFRIGERANT SYSTEM DIAGRAM ············· 10
7. DATA ································································ 12
8. ACTUATOR CONTROL ··································· 20
9. SERVICE FUNCTIONS ··································· 21
10. TROUBLESHOOTING ····································· 22
11. DISASSEMBLY INSTRUCTIONS ···················· 43
PARTS CATALOG (OBBT753)
No. OBHT753

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Summary of Contents for Mitsubishi Electric Trane NTXSPF09A112AA

  • Page 1: Table Of Contents

    OUTDOOR UNIT No. OBHT753 SERVICE MANUAL Models NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA Indoor unit service manual NTXFKS•A112AA Series (OBHT752) CONTENTS 1. TECHNICAL CHANGES ··································· 2 2. PART NAMES AND FUNCTIONS ····················· 3 3. SPECIFICATION ················································ 4 4. OUTLINES AND DIMENSIONS ························ 6 5.

  • Page 2: Technical Changes

    Use the specified refrigerant only Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions.

  • Page 3: Part Names And Functions

    PART NAMES AND FUNCTIONS NTXSPF09A112AA NTXSPF12A112AA Air inlet (back and side) Piping Air outlet Drain hose Drain outlet NTXSPF15A112AA NTXSPF18A112AA Air inlet (back and side) Piping Drain hose Air outlet Drain outlet OBHT753...

  • Page 4: Specification

    SPECIFICATION Outdoor unit model NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA 9,000 12,000 15,000 17,000 Btu/h Cooling 1 (2,300 - 14,000) (2,300 - 15,000) (5,300 - 19,000) (5,300 - 22,500) Capacity Rated (Minimum~Maximum) 11,000 13,000 18,000 21,000 Btu/h Heating 47 1 (2,900 - 19,000) (2,900 - 22,800) (5,700 - 25,000) (5,700 - 29,000)
  • Page 5 Test condition 3, 4 Indoor air condition (°F) Outdoor air condition (°F) Mode Test Dry bulb Wet bulb Dry bulb Wet bulb "A-2" Cooling Steady State (75) at rated compressor Speed "B-2" Cooling Steady State (65) at rated compressor Speed SEER "B-1"...

  • Page 6: Outlines And Dimensions

    OUTLINES AND DIMENSIONS NTXSPF09A112AA NTXSPF12A112AA Unit: inch (mm) REQUIRED SPACE 4 in. (100 mm) or more when front and sides of the unit are clear When any 2 sides of left, right and rear of the unit are clear 2 x hole 3/8 x 13/16 Liquid refrigerant pipe joint Refrigerant pipe (flared) Ø...
  • Page 7 NTXSPF15A112AA NTXSPF18A112AA Unit: inch (mm) REQUIRED SPACE *1 20 in. (500 mm) or more when front and sides of the unit are clear 16-7/16 Air in 1-9/16 Air in Air out 2 x hole 13/32 x 13/16 19-11/16 6-7/8 *2 When any 2 sides of left, right and rear of the unit are clear 33-1/16 3-3/16...

  • Page 8: Wiring Diagram

    WIRING DIAGRAM NTXSPF09A112AA NTXSPF12A112AA OBHT753...
  • Page 9 NTXSPF15A112AA NTXSPF18A112AA FUSE (T6.3AL250V) OBHT753...

  • Page 10: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM NTXSPF09A112AA NTXSPF12A112AA Unit: inch (mm) Refrigerant pipe ø3/8 (ø9.52) 4-way valve (with heat insulator) Muffler Outdoor heat exchanger Stop valve temperature (with service port) thermistor Outdoor Muffler RT68 Discharge heat Flared connection Service exchanger temperature Service port thermistor port RT62...
  • Page 11 MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping: ft. Piping size O.D: in. Model Max. Length Max. Height difference Liquid NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA Indoor unit Max. Height difference Max. Length Outdoor unit ADDITIONAL REFRIGERANT CHARGE (R410A: oz.) NOTE: Refrigerant piping exceeding 25 ft.

  • Page 12: Data

    DATA NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA 7-1. PERFORMANCE DATA 1) COOLING CAPACITY Indoor air Outdoor intake air DB temperature (˚F) Model IWB (˚F) SHC TPC SHC TPC SHC TPC SHC TPC SHC TPC 11.0 0.51 10.3 0.56 0.60 0.63 0.66 NTXSPF09A112AA 10.4 0.48 0.53...
  • Page 13 4) HEATING CAPACITY Indoor air Outdoor intake air WB temperature (˚F) Model IDB (˚F) 0.57 0.69 0.79 0.73 10.7 0.77 11.1 0.78 12.5 0.81 NTXSPF09A112AA 0.55 0.67 0.77 0.71 11.0 0.75 11.3 0.77 12.8 0.80 0.54 0.65 0.75 10.1 0.69 11.3 0.73 11.7...
  • Page 14 7-2. PERFORMANCE CURVE Cooling Cooling capacity (at Rated frequency) Indoor intake air Wet-bulb temperature( F) Outdoor intake air DB temperature(°F) NTXSPF09A112AA NTXSPF12A112AA SHF at rating condition = 0.79 SHF at rating condition = 0.70 Airflow = 417 CFM Airflow = 417 CFM Outdoor intake air DB temperature (°F) Outdoor intake air DB temperature (°F) NTXSPF15A112AA...
  • Page 15 Heating NTXSPF09A112AA NTXSPF12A112AA 120% 120% 100% 100% Outdoor Temperature Degrees (°F) Outdoor Temperature Degrees (°F) HEATING CAPACITY HEATING CAPACITY Outdoor Temperature Degrees (°F) -13.0 Outdoor Temperature Degrees (°F) -13.0 -4.0 5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 -4.0 5.0 14.0 23.0 32.0 41.0 50.0 69.8 75.0 % Heating Capacity % Heating Capacity 66% 83% 100% 100% 100% 100% 100% 100% 100% 100%...
  • Page 16 7-3. CONDENSING PRESSURE Cooling Data are based on the condition of indoor humidity 50 %. Air flow should be set to High speed. NTXSPF09A112AA (PSIG) (PSIG) 100 105 (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature NTXSPF12A112AA (PSIG) (PSIG) 100 105 (°F) (°F) Outdoor ambient temperature...
  • Page 17 Heating Data are based on the condition of outdoor humidity 75%. Air flow should be set to High speed. Data are for heating operation without any frost. NTXSPF09A112AA (PSIG) (PSIG) (°F) (°F) Outdoor ambient temperature Outdoor ambient temperature NTXSPF12A112AA (PSIG) (PSIG) (°F) (°F)
  • Page 18 7-4. STANDARD OPERATION DATA Model NTXFKS09A112AA NTXFKS12A112AA NTXFKS15A112AA NTXFKS18A112AA Item Unit Cooling Heating Cooling Heating Cooling Heating Cooling Heating Capacity Btu/h 9,000 11,000 12,000 13,000 15,000 18,000 17,000 21,000 — 0.79 — 0.70 — 0.66 — 0.65 — Input 0.570 0.750 0.890 0.900...
  • Page 19 7-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY NTXSPF09A112AA Correction of Cooling capacity Correction of Cooling total input Correction of Heating total input Correction of Heating capacity (Hz) (Hz) (Hz) (Hz) The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor The operational frequency of compressor NTXSPF12A112AA...

  • Page 20: Actuator Control

    ACTUATOR CONTROL NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA 8-1. OUTDOOR FAN MOTOR CONTROL The fan motor turns ON/OFF, interlocking with the compressor. [ON] The fan motor turns ON 5 seconds before the compressor starts up. [OFF] The fan motor turns OFF 15 seconds after the compressor has stopped running. 5 seconds 15 seconds Compressor...

  • Page 21: Service Functions

    SERVICE FUNCTIONS NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA 9-1. CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board (Refer to 10-6.1.). Defrost finish temperature Jumper NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA Soldered 41°F (5°C) 50°F (10°C)

  • Page 22: Troubleshooting

    TROUBLESHOOTING NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA 10-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, then after con- firming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.
  • Page 23 10-2. FAILURE MODE RECALL FUNCTION 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. 1.
  • Page 24 2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Check if outdoor unit is abnormal according to the following procedures. Make sure that the remote controller is set to the failure mode recall function. 1.
  • Page 25 3. Outdoor unit failure mode table The left lamp of the Indoor/outdoor Outdoor unit OPERATION Abnormal point LED indication unit failure Condition Remedy failure mode INDICATOR (Failure mode/protection) (Outdoor P.C. board) mode recall recall function lamp function (Indoor unit) None (Normal) —...
  • Page 26 The left lamp of the Indoor/outdoor Outdoor unit OPERATION Abnormal point LED indication unit failure Condition Remedy failure mode INDICATOR (Failure mode/protection) (Outdoor P.C. board) mode recall recall function lamp function (Indoor unit) 10-time blink Discharge temperature Temperature of discharge temperature •...
  • Page 27 10-3. TROUBLESHOOTING CHECK TABLE Abnormal point/ Symptom LED indication Condition Remedy Condition Outdoor unit 1-time blink every Outdoor power sys- Overcurrent protection cut-out operates 3 consecutive times • Reconnect connector of compres- does not op- 2.5 seconds within 1 minute after the compressor gets started. sor.
  • Page 28 Abnormal point/ Symptom LED indication Condition Remedy Condition 'Outdoor unit 12-time blink Each phase current • Refer to 10-5. "How to check stops and 2.5 seconds OFF of compressor inverter/compressor". Each phase current of compressor cannot be detected nor- restarts 3 mally.
  • Page 29 10-4. TROUBLE CRITERION OF MAIN PARTS NTXSPF09A112AA NTXSPF12A112AA NTXSPF15A112AA NTXSPF18A112AA Part name Check method and criterion Figure Defrost thermistor (RT61) Fin temperature thermistor (RT64) Measure the resistance with a tester. Ambient temperature Refer to 10-6. “Test point diagram and voltage”, 1. “Inverter P.C. thermistor (RT65) board”, for the chart of thermistor.
  • Page 30 10-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between the compressor and the power module (IC700) (NTXSPF09A112AA, NTXSPF12A112AA)/IGBT module (IC700) (NTXSPF15A112AA, NTXSPF18A112AA). See 10-5. “Check of open phase”. Check the voltage between terminals. Are the voltages balanced? Replace the inverter P.C.
  • Page 31 D Check of compressor winding ●Disconnect the connector between the compressor and the power module (IC700) (NTXSPF09A112AA, NTXSPF12A112AA)/ IGBT module (IC700) (NTXSPF15A112AA, NTXSPF18A112AA), and measure the resistance between the compressor terminals. <<Measurement point>> At 3 points Measure the resistance between the lead wires at 3 points. BLK-WHT BLK-RED WHT-RED...
  • Page 32 G Check of outdoor thermistors Disconnect the connector of thermistor in the inverter P.C. board (see below table), and measure the resistance of thermistor. Replace the thermistor except RT64. Is the resistance of thermistor normal? When RT64 is abnormal, replace the inverter P.C. (Refer to 10-6.1.) board.
  • Page 33 H Check of R.V. coil NTXSPF09A112AA NTXSPF12A112AA First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to 10-4. In case CN721 is disconnected or R.V. coil is open, voltage is generated between the terminal pins of the connector although no signal is being transmitted to R.V.
  • Page 34 I Check of outdoor fan motor Disconnect the connectors CN931 and CN932 from the inverter P.C. board. Check the connection between the connector CN931 and CN932. Is the resistance between each ter- minal of outdoor fan motor normal? (Refer to 10-4.) Disconnect CN932 from the inverter P.C.
  • Page 35 J Check of power supply Disconnect the connector between the compressor and the power module (IC700) (NTXSPF09A112AA, NTXSPF12A112AA)/ IGBT module (IC700) (NTXSPF15A112AA, NTXSPF18A112AA). Rectify indoor/outdoor Turn ON power supply and press EMERGENCY OPERATION switch. connecting wire. Does the left lamp of the Is there voltage 208/230 V AC Replace the indoor OPERATION INDICATOR lamp on...
  • Page 36 K Check of LEV (Expansion valve) Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TEMP button on the remote controller at the same time, press RESET button. First, release RESET button. Hold down the other 2 buttons for another 3 seconds.
  • Page 37 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. Operate the outdoor unit by starting EMERGENCY OPERATION.
  • Page 38 M How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. Turn ON the power supply. Check the wiring. Is there rated voltage between the outdoor terminal block S1 and S2? Press EMERGENCY OPERATION switch once.
  • Page 39 N Check of defrost heater Check the following points before checking electric continuity. 1. Does the resistance of ambient temperature thermistor have the characteristics? Refer to 10-6.1. 2. Is the resistance of defrost heater normal? Refer to 10-4. 3. Does the heater protector remain conducted (not open)? 4.
  • Page 40 P Electromagnetic noise enters into TV sets or radios Is the unit grounded? Ground the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 9.91 ft. (3m), the indoor unit, and/or the antennas and the or is the distance between the antennas outdoor unit.
  • Page 41 10-6. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board NTXSPF09A112AA NTXSPF12A112AA R.V.coil Smoothing (CN721) Smoothing DB61 Back side of unit Heater connector capacitor (C62) 208/230 V AC capacitor (C61) 260 - 370 V DC (CN722) Fuse (F701) Fuse (F801) 208/230 V AC T3.15AL250V T3.15AL250V...
  • Page 42 NTXSPF15A112AA NTXSPF18A112AA Fuse (F601) T3.15AL250V R.V. coil (CN602) 208/230 V AC Heater connector (CN601) 208/230 V AC Signal of out- door fan motor (CN931) LEV connector (CN724) Output to drive outdoor fan motor Defrost thermistor (CN932) /RT61 (CN671) Discharge temperature thermistor/RT62 Fuse (F901) (CN671)

  • Page 43: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <Detaching method of the terminal with locking mechanism > The terminal which has the locking mechanism can be detached as shown below. There are following 2 types of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 44 OPERATING PROCEDURE PHOTOS/FIGURES Photo 4 Photo 5 Screws of the Screw of the conduit cover conduit plate 2. Removing the inverter assembly, inverter P.C. board Photo 6 (1) Remove the cabinet and panels. (Refer to section 1.) Screws of the heat sink (2) Disconnect the lead wire to the reactor and the following support and the separator connectors:...
  • Page 45 OPERATING PROCEDURE PHOTOS/FIGURES Screw of the 4. Removing the discharge temperature thermistor, Photo 8 R.V. coil defrost thermistor, outdoor heat exchanger tempera- ture thermistor and ambient temperature thermistor (1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following con- nectors: <Inverter P.C.
  • Page 46 OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing outdoor fan motor Photo 11 Screws of the outdoor fan motor (1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board> CN931, CN932 (Fan motor) (3) Remove the propeller fan nut. (4) Remove the propeller fan.
  • Page 47 11-2. NTXSPF15A112AA NTXSPF18A112AA NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the cabinet Photo 1 Screws of the top panel (1) Remove the screws of the service panel. (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover.
  • Page 48 OPERATING PROCEDURE PHOTOS/FIGURES Screw of the 2. Removing the inverter assembly, inverter P.C. board Photo 5 relay panel and relay P.C. board Screws of the (1) Remove the cabinet and panels. (Refer to section 1.) P.B. support Inverter P.C. Ground wires (2) Disconnect the lead wire to the reactor and the following con- board nectors:...
  • Page 49 OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the discharge temperature thermistor, Photo 7 defrost thermistor, outdoor heat exchanger tempera- Outdoor heat exchanger Ambient temperature temperature thermistor thermistor ture thermistor and ambient temperature thermistor (1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
  • Page 50 MITSUBISHI ELECTRIC TRANE HVAC US LLC HEAD OFFICE: 1340 SATELLITE BOULEVARD, SUWANEE, GA 30024, USA © Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Published: Nov. 2018. No. OBHT753 Specifications are subject to change without notice. Made in Japan Publication No. DL-SVG030A-EN...

This manual is also suitable for:

Trane ntxspf12a112aaTrane ntxspf15a112aaTrane ntxspf18a112aa

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