Mitsubishi Electric TRANE TRUZH0421KA00NA Service Manual
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Mitsubishi Electric TRANE TRUZH0421KA00NA Service Manual

Mitsubishi Electric TRANE TRUZH0421KA00NA Service Manual

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SERVICE MANUAL
Outdoor unit
[Model Name]
TRUZH0421KA00NA
CONTENTS
1. REFERENCE MANUAL ····························· 2
2. SAFETY PRECAUTION ····························· 2
3. FEATURES ············································· 6
4. SPECIFICATIONS ···································· 7
5. DATA······················································ 8
6. OUTLINES AND DIMENSIONS ················· 10
7. WIRING DIAGRAM ································· 11
8. WIRING SPECIFICATIONS ······················ 12
9. REFRIGERANT SYSTEM DIAGRAM ············ 16
10. TROUBLESHOOTING ····························· 18
11. EASY MAINTENANCE FUNCTION ············ 73
12. FUNCTION SETTING ······························ 75
14. DISASSEMBLY PROCEDURE ·················· 90
PARTS CATALOG (OCBT567)
September 2019
No. OCHT567

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Summary of Contents for Mitsubishi Electric TRANE TRUZH0421KA00NA

  • Page 1: Table Of Contents

    September 2019 No. OCHT567 SERVICE MANUAL Outdoor unit [Model Name] TRUZH0421KA00NA CONTENTS 1. REFERENCE MANUAL ····························· 2 2. SAFETY PRECAUTION ····························· 2 3. FEATURES ············································· 6 4. SPECIFICATIONS ···································· 7 5. DATA······················································ 8 6. OUTLINES AND DIMENSIONS ················· 10 7. WIRING DIAGRAM ································· 11 8.

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL Service manual No. Model Name Parts catalog No. OCHT640 TPLA0A0421EA70A OCBT640 TPEADA0421AA70A TPCA0A0421KA70A SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. Preparation before the repair service. •...
  • Page 3 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R410A Use a vacuum pump with a reverse flow check Use new refrigerant pipes. valve. In the case of using the existing pipes for R22, be careful Vacuum pump oil may flow back into refrigerant cycle and with the following: that can cause deterioration of refrigerant oil, etc.

  • Page 4: Cautions For Service

    [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) When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant.
  • Page 5 2-3. CAUTIONS FOR REFRIGERANT PIPING WORK New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410A is same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 6: Features

    FEATURES TRUZH0421KA00NA HIGH HEATING CAPACITY Industry-first flash injection circuit is equipped, which enables to Performance (Btu/h) 60%UP about keep the equal capacity to the rating even when outside tem- 50,000 TRUZH0421KA00NA perature is 5°F [−15°C]. 48,000 Btu/h 40,000 28,800 Btu/h -13°F -4°F 5°F...

  • Page 7: Specifications

    SPECIFICATIONS Service Ref. TRUZH0421KA00NA Power supply Phase Single Cycle 60Hz Voltage 208/230V MOCP Breaker size External finish Munsell 3Y 7.8/1.1 Heat exchanger Plate fin coil Defrost method Reverse cycle Crankcase heater Compressor Hermetic Model ANB42FJTMT Motor output R.L.A. L.R.A. Starter type Inverter Fan(drive) o No.

  • Page 8: Data

    DATA 5-1. REFILLING REFRIGERANT CHARGE (R410A: oz, kg) Piping Length ( one way ) Factory Service Ref. 100 ft 110 ft 120 ft 130 ft 140 ft 150 ft 160 ft 165 ft 180 ft 200 ft 210 ft 230 ft 245 ft Charged 30 m...
  • Page 9 5-4. STANDARD OPERATION DATA Representative matching TPLA0A0421EA70A HEATING COOLING Mode 42,000 48,000 Total Capacity BTU/h 4,160 4,560 Input Indoor unit model TPLA0A0421EA70A Phase Single Cycle 60Hz Voltage 230V Current 1.05 A 0.94 A Outdoor unit model TRUZH0421KA00NA Phase Single Cycle 60Hz Voltage 230V...

  • Page 10: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit: mm<inch> TRUZH0421KA00NA OCHT567...

  • Page 11: Wiring Diagram

    WIRING DIAGRAM TRUZH0421KA00NA OCHT567...

  • Page 12: Wiring Specifications

    WIRING SPECIFICATIONS 8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT The following illustrations show available connection patterns. The outdoor unit power supply patterns vary on each model. 1:1 System Simultaneous twin system A Outdoor unit power supply B Wiring circuit breaker or isolating switch C Outdoor unit D Indoor unit/outdoor unit connecting cords E Remote controller...
  • Page 13 8-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIES The following illustrations show available connection patterns. The outdoor unit power supply patterns vary on models. 1:1 System The optional indoor power supply terminal kit is required. Outdoor unit power supply Wiring circuit breaker or isolating switch Outdoor unit Indoor unit/outdoor unit connecting cords Remote controller...
  • Page 14 8-3. INDOOR – OUTDOOR CONNECTING CABLE Wire No. o Size Outdoor power supply Max. 164 ft [50 m] Max. 262 ft [80 m] Max. 147 ft [45 m] Indoor unit-Outdoor unit 3 o AWG13 (polar) 3 o AWG13 (polar) and S3 separated 3 o AWG15 (polar) Note: The maximum cable length may vary depending on the condition of installation, humidity or materials, etc.
  • Page 15 ● M-NET wiring M-NET (1) Use 2-core x 1.25mm [AWG16] shield wire for electric wires. terminal Ground (Excluding the case connecting to system controller.) block wire (2) Connect the wire to the M-NET terminal block. Connect one core of the transmission wire (non-polar) to A terminal and the other to B.

  • Page 16: Refrigerant System Diagram

    Refrigerant flow in cooling Refrigerant flow in heating Symbol Parts name Detail COMP Compressor DC inverter scroll compressor (Mitsubishi Electric Corporation) H/P SW High pressure switch (63H) For protection (OFF: 4.15MPa) L/P SW Low pressure switch (63L) For protection (OFF: −0.03MPa)
  • Page 17 9-1. REFRIGERANT COLLECTING (PUMP DOWN) When relocating or disposing of the indoor/outdoor unit, pump down the system following the procedures below so that no refrig- erant is released into the atmosphere. 1 Turn off the power supply (circuit breaker). 2 Connect the low pressure valve on the gauge manifold to the charge plug (low pressure side) on the outdoor unit. 3 Close the liquid stop valve completely.

  • Page 18: Troubleshooting

    TROUBLESHOOTING 10-1. 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 19: Test Run Operation

    10-2-1. Test run for wired remote controller <PAR-4xMAA ("x" represents 0 or later)> RETURN SELECT MENU HOLD MENU RETURN SELECT ON/OFF Function buttons Select "Service" from the Main menu, and press the [SELECT] button. Test run Input maintenance info. Settings Check Select "Test run"...

  • Page 20: Navigating Through The Screens

    <Error information> When an error occurs, the following screen will appear. Check the error status, stop the operation, and consult your dealer. Check code, error unit, refrigerant address, unit model name, and Error information serial number will appear. (Date and time of occurrence of the er- Error code ror will also appear on PAR-4xMAA.) Error unit...

  • Page 21: Error History

    <Checking the error information> Maintenance menu While no errors are occurring, page 2/2 of the error information Error information can be viewed by selecting "Error information" from the Mainte- Filter information nance menu (PAR-4xMAA) or Main menu (PAR-3xMAA). Cleaning Errors cannot be reset from this screen. Main menu: RETURN Cursor SELECT...

  • Page 22: Test Run For Wireless Remote Controller

    10-2-2. Test run for wireless remote controller Test run [for IR wireless remote controller] Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500 V Megger and check that it is equal to or greater than 1.0 M". TEST COOL 1 Turn on the main power to the unit.

  • Page 23: Self-Diagnosis

    10-3. HOW TO PROCEED "SELF-DIAGNOSIS" 10-3-1. Self-diagnosis <PAR-4xMAA ("x" represents 0 or later)> Select "Service" from the Main menu, Diagnosis and press the [SELECT] button. Self check Remote controller check Select "Check" from the Service menu, and press the [SELECT] button. Service menu: MENU Cursor Select "Diagnosis"...

  • Page 24: Remote Controller Check

    10-3-2. Remote controller check <PAR-4xMAA ("x" represents 0 or later)> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, and press the [SELECT] button. Diagnosis Self check Remote controller check Select "Check"...
  • Page 25 10-3-4. Malfunction-diagnosis method by IR wireless 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> [Procedure] 1.
  • Page 26 • 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 0.5 s Approx.
  • Page 27 10-4. SELF-DIAGNOSIS ACTION TABLE Note: Refer to indoor unit section for the codes starting <Abnormalities detected when the power is turned on> with P and E. Check Code Abnormal point and detection method Cause Judgment and action 1 No voltage is supplied to termi- 1 Check following items.
  • Page 28 Abnormal point and detection method Cause Judgment and action Check Code 63H connector open 1 Disconnection or contact failure 1 Check connection of 63H connector on Abnormal if 63H connector circuit is open of 63H connector on outdoor outdoor controller circuit board. for 3 minutes continuously after power sup- controller circuit board Refer to "10-9.
  • Page 29 <Abnormalities detected while unit is operating> <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Check Code Cause High pressure (High pressure switch 1 Short cycle of indoor unit 1–6 Check indoor unit and repair defect. 63H worked) 2 Clogged filter of indoor unit Abnormal if high pressure switch 63H...
  • Page 30 Check Code Abnormal point and detection method Cause Judgment and action Open/short circuit of outdoor unit 1 Disconnection or contact failure 1 Check connection of connector (TH4, TH34) on temperature thermistor (TH4, TH34) of connectors (TH4, TH34) on the outdoor controller circuit board. Check break- Abnormal if open (37˚F [3: ] or less) or the outdoor controller circuit ing of the lead wire for TH4, TH34.
  • Page 31 Check Code Abnormal point and detection method Cause Judgment and action Too low superheat due to low discharge 1 Disconnection or loose connec- 12 Check the installation conditions of dis- temperature tion of discharge charge temperature thermistor (TH4). Abnormal if discharge superheat is con- temperature thermistor (TH4) tinuously detected less than or equal to 2 Defective holder of discharge...
  • Page 32 Check Code Abnormal point and detection method Cause Judgment and action Detailed Abnormal power synchronous 1 Distortion of power source 1 Check the field facility for the power supply. codes signal voltage, noise superimposition • No input of power synchronous 2 Disconnection or loose 2 Check earth wiring.
  • Page 33 Abnormal point and detection method Cause Judgment and action Check Code Abnormal low pressure (63L worked) 1 Stop valve of outdoor unit is 1 Check stop valve. Abnormal if 63L is worked (under −4 PSIG closed during operation. [−0.03 MPa]) during compressor operation. 2 Disconnection or loose con- 2–4 Turn the power off and on again to check 63L: Low pressure switch...
  • Page 34 Check Code Abnormal point and detection method Cause Judgment and action Remote controller transmission error(E3)/signal receiving error(E5) 1 2 remote controllers are set as 1 Set a remote controller to main, and the 1 Abnormal if remote controller could not “main.”...
  • Page 35 Check Code Abnormal point and detection method Cause Judgment and action Non defined check code 1 Noise has entered transmission 12 Turn the power off, and on again to check. This code is displayed when non-defined wire of remote controller. Replace indoor controller board or outdoor (6607 check code is received.
  • Page 36 only P-series outdoor unit Check Code Abnormal point and detection method Cause Judgment and action 1 Slight temperature difference 1–4 Check pipe <liquid or condenser/ Pipe temperature between indoor room tempera- evaporator> temperature with room tem- <Cooling mode> ture and pipe <liquid or con- perature display on remote controller and Detected as abnormal when the pipe tem- denser/evaporator>...
  • Page 37 <M-NET communication error> Note: “Indoor unit” in the text indicates M-NET board in outdoor unit. Check Code Abnormal point and detection method Cause Judgment and action Address duplicate definition Search the unit with same address as abnormali- 1 There are 2 or more same This error is displayed when transmission address of controller of out- ty occurred.
  • Page 38 Abnormal point and detection method Cause Judgment and action Check Code NO ACK signal Always try the followings when the error Common factor that has no rela- “A7” occurs. 1. Transmitting side controller detects tion with abnormality source. abnormal if a message was transmitted 1 The unit of former address but there is no reply (ACK) that a mes- does not exist as address...
  • Page 39 From the previous page. Abnormal point and detection method Cause Judgment and action Check Code 4. If displayed address or attribute is 1 During group operation with Same as mentioned in “A7” of the previous indoor unit of multi- refrigerant remote controller, page.
  • Page 40 Check Code Abnormal point and detection method Cause Judgment and action M-NET NO RESPONSE 1 Transmitting condition is 1 Check transmission waveform or noise on repeated fault because of Abnormal if a message was transmitted transmission wire. noise and the like. and there were reply (ACK) that message 2 Turn off the power supply of outdoor unit 2 Extension of transmission wire...
  • Page 41 Phenomena Factor Countermeasure 4. Even controlling by the IR wireless 1 The pair number settings of the IR wireless remote 1 Check the pair number settings. remote controller no beep is heard controller and indoor controller board are mismatched. and the unit does not start operat- ing.
  • Page 42 Symptoms: “PLEASE WAIT” is kept being displayed on the remote controller. Inspection method and Diagnosis flow Cause troubleshooting Check the display time of “PLEASE WAIT” after turning on the main power. 6 minutes 2 minutes or more or less How long is “PLEASE WAIT” •...
  • Page 43 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 1 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit.
  • Page 44 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 2 LED1 : LED2 : LED3 : Inspection method and Diagnosis flow Cause troubleshooting Check the voltage between S1 and S2 on the terminal block (TB4) of the indoor unit.
  • Page 45 LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller 3 LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the indoor unit. 10 to 16 VDC? •...
  • Page 46 • Before repair Frequent calls from customers Phone Calls From Customers How to Respond Note Unit does 1 The operating display of remote 1 Check if power is supplied to air conditioner. not operate controller does not come on. Nothing appears on the display unless power is at all.
  • Page 47 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated sufficiently. 1 Check the set temperature of remote controller. The outdoor unit cannot be operated if the set temperature is not appropriate. The outdoor unit operates in the following modes. COOL: When the set temperature is lower than the room temperature.
  • Page 48 Phone Calls From Customers How to Respond Note Something 3 Air blows out for a while after However, this control is also 3 This is not a malfunction. is wrong HEAT operation is stopped. The blower is operating just for cooling down the applied to the models which with the heated-up air conditioner.
  • Page 49 Phone Calls From Customers How to Respond Note A white mist is expelled from the indoor unit. This is not a malfunction. This may occur when the operation gets started in the room of high humidity. Water or moisture is expelled from the outdoor Cooling;...
  • Page 50 10-6. HOW TO CHECK THE PARTS TRUZH0421KA00NA Checkpoints Parts name Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. (Ambient temperature 50 to 86°F [10 to 30:]) Liquid pipe> Thermistor (TH4) Normal Abnormal <Discharge> 160 to 410k" Thermistor (TH6) TH34 <2-phase pipe>...
  • Page 51 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connector (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2) for the motor with the power supply on. board and fan motor.) (It causes trouble of the outdoor controller circuit Self check...
  • Page 52 10-7. HOW TO CHECK THE COMPONENTS <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid pipe> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) • Thermistor <Suction pipe> (TH32) Thermistor R0 = 15 kΩ ± 3% B constant = 3480 ± 2% =15exp{3480( 273+t –...

  • Page 53: Linear Expansion Valve

    Linear expansion valve (1) Operation summary of the linear expansion valve • Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the outdoor controller board. • Valve position can be changed in proportion to the number of pulse signal. <Connection between the indoor controller board and the linear expansion valve>...
  • Page 54 (3) How to attach and detach the coil of linear expansion valve <Composition> Linear expansion valve is separable into the main body and the coil as shown in the diagram below. Main body Stopper Coil Lead wire <How to detach the coil> Hold the lower part of the main body (shown as A) firmly so that the main body does not move and detach the coil by pulling it upward.

  • Page 55: Emergency Operation

    10-8. EMERGENCY OPERATION (1) When any check codes shown below is displayed on outdoor unit, or microprocessor for wired remote controller or indoor unit has a failure while no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 56 (5) Operation data during emergency operation During emergency operation, no communication is performed with the indoor unit, so the data items needed for operation are set to the following values: Operation mode Remarks Operation data COOL HEAT 81°F [27:] 69°F [20.5:] Intake temperature (TH1) 41°F [5:] 113°F [45:]...
  • Page 57 10-9. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board TRUZH0421KA00NA Manual defrost, detect history record reset, Demand control setting refrigerant address 21S4 Model select Four-way valve Test operation CN51 External signal output • Compressor operat- Pump down ing signal •...
  • Page 58 Outdoor power circuit board TRUZH0421KA00NA Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). 1. Check of POWER MODULE 1 Check of DIODE circuit R - L1 , S - L1 , R - N1 , S - N1 2 Check of IGBT circuit L2 - N1 3 Check of INVERTER circuit...
  • Page 59 10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS (1) Function of switches The black square (■) indicates a switch position. Type Action by the switch operation Function Effective timing Switch switch When compressor is working Manual defrost* Start Normal in heating operation.* Abnormal history clear Clear Normal...
  • Page 60 Action by the switch operation Type of Switch Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery* No function — — — 3,4,5 Model select Following SW5-6 reference Power consumption SW7-1 SW7-2...

  • Page 61: Special Function

    Special function (a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by external signal input setting. Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for demand input located on the outdoor controller board enables to control compressor operation frequency.
  • Page 62 <Display function of inspection for outdoor unit> The blinking patterns of both LED1(green) and LED2(red) indicate the types of abnormality when it occurs. Types of abnormality can be indicated in details by connecting an optional part “A-Control Service Tool (PAC-SK52ST)” to connector CNM on outdoor controller board.
  • Page 63 Indication Error Check Outdoor controller board Detailed Contents Inspection method code* reference LED1 (Green) LED2 (Red) page Abnormality of Discharge 1 Check if stop valves are open. 3 blinking 1 blinking 2 Check if connectors (TH4, TH34, LEV-A, and LEV-B) on outdoor temperature (TH4) and Comp.
  • Page 64 <Outdoor unit operation monitor function> [When optional part “A-Control Service Tool(PAC-SK52ST)” is connected to outdoor controller board(CNM)] Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of check code by controlling DIP SW2 on “A-Control Service Tool”. Operation indicator SW2 : Indicator change of self diagnosis SW2 setting...
  • Page 65 The black square (■) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid(TH3) −40 to 194 [−40 to 90:] −40 to 194 (When the coil thermistor detects 0˚F [0:] or below, “–” and temperature are displayed by turns.) ˚F [:] Example: When−10˚F;...
  • Page 66 The black square (■) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid(TH3) on error −40 to 194 [−40 to 90:] occurring (When the coil thermistor detects 0˚F [0:] or below, “–” −40 to 194 and temperature are displayed by turns.) ˚F [:] Example: When −15˚F;...
  • Page 67 The black square (■) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 3 The number of connected indoor units (The number of connected indoor units are dis- played.) Unit 2 3 4 5 6 Capacity setting display Displayed as an outdoor capacity code Capacity...
  • Page 68 The black square (■) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 62 to 86 [17 to 30:] 62 to 86 ˚F [:] 2 3 4 5 6 Pressure saturation temperature −38 to 190 [−39 to 88:] (When the temperature is 0˚F [0:] or less, “–”...
  • Page 69 The black square (■) indicates a switch position. Unit SW2 setting Display detail Explanation for display 180 to 370 DC bus voltage (When it is 100 V or more, hundreds digit, tens 180 to 370 digit and ones digit are displayed by turns.) 2 3 4 5 6 0 to 100 Capacity save...
  • Page 70 The black square (■) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 480 LEV-A opening pulse on error occurring (When it is 100 pulse or more, hundreds digit, tens 0 to 480 digit and ones digit are displayed by turns.) Example: When 130 pulse;...
  • Page 71 The black square (■) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0 to 327 [0 to 182:] Discharge superheat on error occurring (When the temperature is 100˚F or more, hundreds digit, tens digit and ones digit are 0 to 327 displayed by turns.) ˚F [:]...
  • Page 72 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Outdoor suction pipe temperature (TH32) −38 to 190 [−39 to 88°C] −38 to 190 (When the temperature is 0˚F [0:] or less, “–” and temperature are displayed by turns.) Example: When −15°C;...

  • Page 73: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION 11-1. SMOOTH MAINTENANCE Maintenance data, such as the indoor/outdoor unit’s heat exchanger temperature and compressor operation current can be displayed with “Smooth maintenance”. This cannot be executed during test operation. Depending on the combination with the outdoor unit, this may not be supported by some models. Check menu Select "Service"...
  • Page 74 11-2. GUIDE FOR OPERATION CONDITION Checkpoints 8 into the graph given below. Enter the temperature differences between Operation state is determined according to the plotted areas on the graph. For data measurements, set the fan speed to “Hi” before activating maintenance mode. Inspection item Result Classification...

  • Page 75: Function Setting

    FUNCTION SETTING 12-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set set as necessary using the remote controller. The setting of function for each unit can only be done by the remote controller. Select function available from the table 1. (1) Functions available when setting the unit number to 00 (Select 00 referring to 4 setting the indoor unit number.) <Table 1>...
  • Page 76 12-1-1. Selecting functions using the wired remote controller <PAR-4xMAA ("x" represents 0 or later)> <Service menu> Maintenance password is required Select "Service" from the Main menu, and press the [SELECT] button. Main Main menu *At the main display, the menu button and select "Service" to make the maintenance setting.
  • Page 77 <Function setting> Settings menu Select "Service" from the Main menu, and press the [SELECT] button. Function setting Select "Setting" from the Service menu, and press the [SELECT] button. Service menu: MENU Select "Function setting", and press the [SELECT] button. SELECT MENU RETURN HOLD...
  • Page 78 12-1-2. Selecting functions using the IR wireless remote controller (Type C) Functions can be selected with the IR wireless remote controller. Function selection using the IR wireless remote controller is available only for refrigerant system with wireless function. Refrigerant address cannot be specified by the IR wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.
  • Page 79 12-2. Function selection of the IR wireless remote controller TEMPERATURE DISPLAY -C/-F SETTING (Change of temp mode from -F to -C) 1 Press the set button with something sharp at the end. MODEL SELECT blinks. AUTO START 2 Press the button. “F:” blinks. 3 Press the button.

  • Page 80: Monitoring The Operation Data By The Remote Controller

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 13-1. HOW TO "MONITOR THE OPERATION DATA" 13-1-1. PAR-4xMAA ("x" represents 0 or later) Details on the operation data including each thermistor temperature and error history can be confirmed with the remote controller. Check menu Select "Service"...
  • Page 81 13-2. REQUEST CODE LIST Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed. Description Request content Unit Remarks (Display range) Operation state Refer to 13-2-1. Detail Contents in Request Code. – Compressor-Operating current (rms) 0 –...
  • Page 82 Description Request content Unit Remarks (Display range) Indoor unit-Control state – Refer to 13-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 13-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 13-2-1.Detail Contents in Request Code. – Outdoor unit-Fan control state –...
  • Page 83 Description Request content Unit Remarks (Display range) Error history 1 (latest) Displays error history. (" - - " is displayed if no history is present.) Code Error history 2 (second to last) Displays error history. (" - - " is displayed if no history is present.) Code Error history 3 (third to last) Displays error history.
  • Page 84 Description Request content Unit Remarks (Display range) Indoor-Fan operating time 0 – 9999 1 hour (After filter is reset) Indoor-Total operating time 0 – 9999 10 hours (Fan motor ON time) Indoor fan output value (Sj value) 0 – 255 –...
  • Page 85 13-2-1. Detail Contents in Request Code Example) Request code "004" Request code Discharge temperature 156°F Ref.address Request code Refrigerant address "00" Request: SELECT Cursor [Operation state] (Request code ": 0 ") Relay output state Power currently Data display Display Compressor 4-way valve Solenoid valve supplied to compressor...
  • Page 86 [Fan control state] (Request code :" 53 ") Data display Fan step correction value by heatsink temperature overheat prevention control Fan step correction value by cool condensation temperature overheat prevention control Display Correction value - (minus) – 1 [Actuator output state] (Request code :"54") Data display Actuator output state 1 Actuator output state 2...
  • Page 87 [Contact demand capacity] (Request code: "61") Setting content Data display Setting Display Setting value Setting content SW7-1 SW7-2 100% [External input state] (Request code: "62") Input state : Input present Data display Contact demand Silent mode Spare 1 Spare 2 Display Input state input...
  • Page 88 [Outdoor unit switch setting display (SW1 to SW10, except SW3)] Request codes: 73 to 82 0: Switch OFF 1: Switch ON 0: Switch OFF 1: Switch ON SW1, SW2, SW6, SW7 Data display Data display 00 00 00 00 00 01 00 01 00 02 00 02...
  • Page 89 [Indoor unit – Model setting information] (Request code : 162) Data display Display Model setting state Display Model setting state See the table on the right. TPLA0A***1EA TPCA0A***1KA TPKA0A***1KA [Indoor unit – Capacity setting information] (Request code: 163 ) Data display Display Capacity setting state Display...

  • Page 90: Disassembly Procedure

    DISASSEMBLY PROCEDURE TRUZH0421KA00NA OPERATING PROCEDURE PHOTOS/FIGURES Top panel fixing screws Top panel Photo 1 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove the service panel.

  • Page 91: Operating Procedure

    OPERATING PROCEDURE PHOTOS/FIGURES 4. Removing the thermistor <2-phase pipe> (TH6) and Photo 5 thermistor <Ambient>(TH7) (1) Remove the service panel. (See Photo 1) Electrical parts (2) Remove the top panel. (See Photo 1) (3) Disconnect the connectors TH7/6 (red) on the controller cir- cuit board in the electrical parts box.
  • Page 92 OPERATING PROCEDURE PHOTOS/FIGURES 7. Removing the 4-way valve coil (21S4), and linear expansion valve coil (LEV-A, LEV-B, LEV-C) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 4) Photo 10 [Removing the 4-way valve coil] (3) Remove 4-way valve coil fixing screw (M5 ×...
  • Page 93 OPERATING PROCEDURE PHOTOS/FIGURES 11. Removing the reactor (DCL) Photo 11 (1) Remove the service panel. (See Photo 1) Electrical parts box Reactor (DCL) (2) Remove the top panel. (See Photo 1) (3) Remove the electrical parts box. (See Photo 4) (4) Remove 4 reactor fixing screws (4 ×...
  • Page 94 MITSUBISHI ELECTRIC TRANE HVAC US LLC HEAD OFFICE: 1340 SATELLITE BOULEVARD, SUWANEE, GA 30024, USA CCopyright 2019 MITSUBISHI ELECTRIC CORPORATION Published: Sep. 2019 No.OCHT567 Made in Japan Specifications are subject to change without notice.

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