Mitsubishi Electric TRANE TPKA0A0121HA70A Service Manual
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Mitsubishi Electric TRANE TPKA0A0121HA70A Service Manual

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SERVICE MANUAL
Indoor unit
[Model Name]
TPKA0A0121HA70A
TPKA0A0181HA70A
INDOOR UNIT
TEMP.
ON/OFF
ON
RETURN SELECT
MENU
HOLD
OFF
WIRED REMOTE
CONTROLLER
(Option)
COOL
DRY
AUTO
FAN
HEAT
IR WIRELESS REMOTE
CONTROLLER (Option)
CONTENTS
1. REFERENCE MANUAL ................................... 2
2. SAFETY PRECAUTION ................................... 3
3. PARTS NAMES AND FUNCTIONS ................. 4
4. SPECIFICATIONS ........................................... 12
5. NOISE CRITERION CURVES ......................... 13
6. OUTLINES AND DIMENSIONS ...................... 14
7. WIRING DIAGRAM ......................................... 15
9. TROUBLESHOOTING .................................... 17
10. FUNCTION SETTING ..................................... 31
11. SPECIAL FUNCTION ..................................... 32
12. DISASSEMBLY PROCEDURE ....................... 36
PARTS CATALOG (OCBT637)
September 2019
No. OCHT637

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Summary of Contents for Mitsubishi Electric TRANE TPKA0A0121HA70A

  • Page 1: Table Of Contents

    September 2019 No. OCHT637 SERVICE MANUAL Indoor unit [Model Name] TPKA0A0121HA70A TPKA0A0181HA70A CONTENTS 1. REFERENCE MANUAL ........2 2. SAFETY PRECAUTION ........3 3. PARTS NAMES AND FUNCTIONS ....4 4. SPECIFICATIONS ........... 12 5. NOISE CRITERION CURVES ......13 6.

  • Page 2: Reference Manual

    REFERENCE MANUAL OUTDOOR UNIT SERVICE MANUAL Model Name Service Manual No. TRUZA0121KA70NA TRUZA0181KA70NA TRUYA0121KA70NA OCHT636 TRUYA0181KA70NA TRUZA0121KA70BA OCBT636 TRUZA0181KA70BA TRUZA0121KA70BA TRUZA0181KA70BA Remote controller (Optional parts) Wired remote controller IR wireless remote controller COOL AUTO HEAT TEMP. ON/OFF RETURN SELECT MENU HOLD OCHT637...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use the following tools specifically designed for Use new refrigerant pipes. use with R410A refrigerant.

  • Page 4: Parts Names And Functions

    [1] Cautions for service (1) Perform service after recovering the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them. [2] Additional refrigerant charge When charging directly from cylinder (1) Check that cylinder for R410A on the market is syphon type.
  • Page 5 3-2. Wired Remote Controller <TAR-40MAA> Controller interface The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear.
  • Page 6 Display The main display can be displayed in two different modes: “Full” and “Basic”. The initial setting is “Full”. To switch to the “Basic” mode, change the setting on the Main display setting. (Refer to operation manual included with remote controller.) <Full mode>...
  • Page 7 Main menu Press the button. MENU Move the cursor to the desired item with the buttons, and press the button. SELECT Operation Vane · Louver · Vent. (Lossnay) High power Comfort Manual vane angle 3D i-see Sensor Timer menu Timer ON/OFF timer Auto-OFF timer Weekly timer...
  • Page 8 Continue from the previous page. Maintenance menu Error information Filter information Cleaning Auto descending panel Descending operation Descending adjustment Service menu Test run menu Test run Drain pump test run Maintenance information Model name input Serial No. input Dealer information input Initialize maintenance info.
  • Page 9 Main menu list Main Setting and display items Setting details menu Operation Vane · Louver · Vent. Use to set the vane angle. (Lossnay) • Select a desired vane setting from 5 different settings. Use to turn ON/OFF the louver. •...
  • Page 10 Main Setting and display items Setting details menu Initial Basic Main/Sub When connecting 2 remote controllers, one of them needs to be designated as setting setting a sub controller. Clock Use to set the current time. Daylight Set the daylight saving time. saving time Administrator The administrator password is required to make the settings for the following...
  • Page 11 3-3. IR wireless remote controller (Option) CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed.

  • Page 12: Specifications

    SPECIFICATIONS Model TPKA0A0121HA70A Power supply(phase, cycle, voltage) 1 phase, 60 Hz, 208/230 V Max. Fuse Size Min.Circuit Ampacity External finish White Munsell 1.0Y 9.2/0.2 Heat exchanger Plate fin coil Fan(drive) o No. Line flow fan (direct) o 1 Fan motor output 0.030 Fan motor 0.33...

  • Page 13: Noise Criterion Curves

    NOISE CRITERION CURVES TPKA0A0121HA70A SPL(dB) LINE NOTCH TPKA0A0181HA70A High NC-70 NC-60 NC-50 NC-40 NC-30 APPROXIMATE THRESHOLD OF HEARING FOR NC-20 CONTINUOUS NOISE 1000 2000 4000 8000 BAND CENTER FREQUENCIES, Hz MAIN UNIT WALL 3.3 ft 3.3 ft MICROPHONE OCHT637...

  • Page 14: Outlines And Dimensions

    OUTLINES AND DIMENSIONS TPKA0A0121HA70A TPKA0A0181HA70A Unit: inch (mm) 15-3/16(387) 7-1/2(192) Top side Mount board 23-9/16(599) Front side Right side 9-13/16(249) 3/16(5) Left side 27-1/16(688) 6-1/16(155) 2-1/8 (55) Knock out hole 35-3/8(898) Knock out hole for left piping for right piping Front side(Grille open) Sleeve Through hole...

  • Page 15: Wiring Diagram

    WIRING DIAGRAM TPKA0A0121HA70A TPKA0A0181HA70A OCHT637...

  • Page 16: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM TPKA0A0121HA70A TPKA0A0181HA70A Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Pipe temperature Refrigerant flow in cooling thermistor/liquid (TH2) Refrigerant flow in heating Condenser/evaporator temperature thermistor (TH5) Refrigerant LIQUID pipe connection (Flare) Room temperature thermistor (TH1) Strainer (#50) Distributor with strainer (#50/#50) OCHT637...

  • Page 17: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Check code displayed by self-diagnosis and actions to be taken for service (summary)> Present and past check codes are logged, and they can be displayed on the wired remote controller and control board of out- door unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring in the field, are summa- rized in the table below.
  • Page 18 9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER <In the case of trouble during operation> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop. < Malfunction-diagnosis method at maintenance service> ■IR wireless remote controller [Procedure] 1.
  • Page 19 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern Approx. 2.5 s 0.5 s 0.5 s 0.5 s Approx.
  • Page 20 • On IR wireless remote controller The continuous buzzer sounds from receiving section of indoor unit. Blink of operation lamp • On wired remote controller Check code displayed in the LCD. (Refer to the previous page, check code.) • If the unit cannot be operated properly after the test run, refer to the following table to find out the cause. Symptom Cause Wired remote controller...
  • Page 21 Note: 9-3. SELF-DIAGNOSIS ACTION TABLE Errors to be detected in outdoor unit, such as codes starting with F, U or E (excluding E0 to E7), are not covered in this document. Please refer to the outdoor unit service manual for the details. Check code Abnormal point and detection method Cause...
  • Page 22 only P-series outdoor unit Check code Abnormal point and detection method Cause Countermeasure Freezing/overheating protection is work- (Cooling or drying mode) (Cooling or drying mode) 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
  • Page 23 only P-series outdoor unit Check code Abnormal point and detection method Cause Countermeasure Condenser/evaporator temperature ther- 1 Defective thermistor 1–3 Check resistance value of thermistor. For characteristics, refer to (P1) mistor (TH5) characteristics above. 1 The unit is in 3-minute resume protec- 2 Contact failure of connector 2 Check contact failure of connector (CN44) tion mode if short/open of thermistor is...
  • Page 24 Check code Abnormal point and detection method Cause Countermeasure Remote controller transmission 1 2 remote controllers are set as 1 Set a remote controller to main, and the error(E3)/signal receiving error(E5) “main.” other to sub. (In the case of 2 remote con- 1 Abnormal if remote controller could not find blank of transmission path for 6 sec- trollers)
  • Page 25 9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)Upward/downward vane The vane is not downward during defrosting and heat Normal operation (The vane is set to performance failure preparation and when the thermostat is OFF in HEAT horizontal regardless of remote control.)
  • Page 26 9-5. EMERGENCY OPERATION 9-5-1. When IR wireless remote controller fails or its battery is exhausted When the remote controller cannot be used When the batteries of the remote controller run out or the remote controller malfunctions, the emergency operation can be done using the emergency buttons.
  • Page 27 9-6. HOW TO CHECK THE PARTS TPKA0A0121HA70A TPKA0A0181HA70A Parts name Checkpoints Room temperature Disconnect the connector then measure the resistance with a tester. thermistor (TH1) (At the ambient temperature 50 to 86_F [10 to 30°C]) Pipe temperature Normal Abnormal thermistor/liquid (TH2) (Refer to “9-6-1.
  • Page 28 9-6-2. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes · High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check...
  • Page 29 9-7. TEST POINT DIAGRAM Indoor controller board TPKA0A0121HA70A TPKA0A0181HA70A CNMF Connect to the fan motor (MF) 1–3: 294–325 V DC 4–3: 15 V DC 5–3: 0–6.5 V DC CN105 6–3: 0 or 15 V DC CN01 Connect to the Terminal block (TB4) 1–3: 208/230 V AC Emergency FUSE...
  • Page 30 9-8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the DIP switch and the jumper wire on indoor controller board. TPKA0A0121HA70A TPKA0A0181HA70A ■ The black square ( ) indicates a switch position. Jumper wire Setting by the DIP switch and jumper wire Functions Remarks MODEL...

  • Page 31: Function Setting

    FUNCTION SETTING 10-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. (1) Functions available when setting the unit number to 00 Refer to the service manual that comes with each outdoor unit.

  • Page 32: Special Function

    SPECIAL FUNCTION 11-1. Rotation Function (and back-up function, 2nd stage cut-in function) This function is only available when using wired remote controller. 11-1-1. Operation (1) Rotation function (and Back-up function) Outline of functions · Main and sub units operate alternately according to the interval of rotation setting. Note: Main and sub unit should be set by refrigerant address.
  • Page 33 System constraint · This function is available only in cooling mode. Ex.) Set temp. by R/C = 68°F [20:] [2nd stage cut-in function]··· Request code number "322–324" Set point = 79°F [26:] When request code number is “323”. Room temp. ] Set point Room temp.
  • Page 34 (2) How to send a request code Press the [ ] button. Main Main menu Select "Service" with the and press the [SELECT] button. Service RETURN SELECT MENU HOLD Enter the current maintenance password (4 numerical digits). • Move cursor to the digit you want to change with the button.
  • Page 35 11-2. BACK-UP HEATING FUNCTION 11-2-1. Operation The back-up heater turns ON when both of the following conditions have been satisfied: A) When the room temperature has not risen after the heater ON delay time has passed. Note: The heater ON delay time starts when the condition of “set temperature − room temperature > 1°F [0.5:]” has been satisfied. B) Set temperature −...

  • Page 36: Disassembly Procedure

    DISASSEMBLY PROCEDURE TPKA0A0121HA70A TPKA0A0181HA70A Be careful when removing heavy parts. OPERATION PROCEDURE PHOTOS/FIGURES 1. Removing the lower side of the indoor unit from the Figure 1 installation plate (1) Remove the front panel. (2) Insert the screw driver to the corner hole at both left and right side as shown in the figure 1.
  • Page 37 OPERATION PROCEDURE PHOTOS/FIGURES 3. Removing the indoor controller board and IR wire- Photo 3 less controller board Screw (side cover) Electrical box Screw (top cover) cover (top) (1) Remove the front panel. (Refer to step 2) Electrical box (2) Remove the room temp. thermistor TH1. (see Photo 3) cover (side) (3) Remove the electrical box covers (screw 4 ×...
  • Page 38 OPERATION PROCEDURE PHOTOS/FIGURES Electrical box cover (side) 5. Removing the nozzle assembly (with vane and vane Photo 7 Electrical box cover (top) motor) and drain hose Screw (side cover) Screw (top cover) (1) Remove the front panel (Refer to step 2). (2) Remove the electrical box cover.
  • Page 39 OPERATION PROCEDURE PHOTOS/FIGURES 8. Removing the pipe temperature thermistor/liquid Photo 12 Condenser/evaporator tem- perature thermistor (TH5) and the condenser/evavorator temperature thermis- Heat exchanger (1) Remove the front panel. (Refer to step 2) (2) Remove the electrical box cover. (3) Remove the motor band. (4) Cut the wiring fixed band.
  • Page 40 MITSUBISHI ELECTRIC TRANE HVAC US LLC HEAD OFFICE: 1340 SATELLITE BOULEVARD, SUWANEE, GA 30024, USA CCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Published: Sep. 2019 No.OCHT637 Made in Japan Specifications are subject to change without notice.

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