Mitsubishi Electric Mr.Slim PUHZ-SHW80VHA Service Manual
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Mitsubishi Electric Mr.Slim PUHZ-SHW80VHA Service Manual

Split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A
Outdoor unit
[Model names]
PUHZ-SHW80VHA
PUHZ-SHW112VHA
PUHZ-SHW112YHA
PUHZ-SHW140YHA
www.zubadan.ro
[Service Ref.]
PUHZ-SHW80VHA
PUHZ-SHW112VHA
PUHZ-SHW112YHA
PUHZ-SHW140YHA
Note:
• This manual describes only
service data of the outdoor
units.
• RoHS compliant products
have <G> mark on the spec
name plate.
CONTENTS
1. REFERENCE MANUAL ································ 2
2. SAFETY PRECAUTION ······························· 3
3. SPECIFICATIONS ········································ 7
4. DATA ····························································· 9
5. OUTLINES AND DIMENSIONS·················· 11
6. WIRING DIAGRAM ····································· 12
7. WIRING SPECIFICATIONS ························ 14
8. REFRIGERANT SYSTEM DIAGRAM ········ 15
9. TROUBLESHOOTING ································ 17
10. FUNCTION SETTING ································· 73
12. EASY MAINTENANCE FUNCTION ··········· 90
13. DISASSEMBLY PROCEDURE ··················· 95
PARTS CATALOG (OCB526)
September 2012
No.OCH526

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Summary of Contents for Mitsubishi Electric Mr.Slim PUHZ-SHW80VHA

  • Page 1: Table Of Contents

    No.OCH526 SERVICE MANUAL www.zubadan.ro R410A Outdoor unit [Model names] [Service Ref.] Note: • This manual describes only PUHZ-SHW80VHA PUHZ-SHW80VHA service data of the outdoor units. • RoHS compliant products PUHZ-SHW112VHA PUHZ-SHW112VHA have <G> mark on the spec name plate. PUHZ-SHW112YHA...

  • Page 2: Reference Manual

    REFERENCE MANUAL INDOOR UNIT SERVICE MANUAL 1-1. FOR AIR TO WATER SYSTEM Model name Service ref. Service manual No. EHST20C-VM6HB EHST20C-VM6HB.UK EHST20C-YM9HB EHST20C-YM9HB.UK EHST20C-VM6B EHST20C-VM6B.UK EHST20C-YM9B EHST20C-YM9B.UK EHST20C-VM6EB EHST20C-VM6EB.UK EHST20C-YM9EB EHST20C-YM9EB.UK OCH531 EHST20C-VM6SB EHST20C-VM6SB.UK EHPT20X-VM2HB EHPT20X-VM2HB.UK EHPT20X-VM6HB EHPT20X-VM6HB.UK EHPT20X-YM9HB EHPT20X-YM9HB.UK EHPT20X-VM6B EHPT20X-VM6B.UK EHPT20X-YM9B...

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. Preparation before the repair service. • Prepare the proper tools. • Prepare the proper protectors. • Provide adequate ventilation. • After stopping the operation of the air conditioner, turn off the power-supply breaker. •...
  • Page 4 [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: Precautions When Reusing Existing R22 Refrigerant Pipes

    2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES (1) Flowchart Measure the existing pipe thickness and check for damage. The existing pipe thickness meets speci- The existing pipe thickness does not meet fications and the pipes are not damaged. specifications or the pipes are damaged. Check if existing air conditioner can operate.
  • Page 6 (2) 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 times higher than that of R22, their sizes of flared sections and flare nuts are different.

  • Page 7: Specifications

    SPECIFICATIONS <Reference data> Plate heat exchanger (MWA2-38PA) Rating conditions Nominal operating condition Heating (A2/W35) SHW80 SHW112 SHW140 Outside air temperature (Dry-bulb) + 2 °C Nominal water fl ow L/min 22.9 32.1 40.1 Outside air temperature (Wet-bulb) + 1 °C Heating Capacity 11.2 14.0...
  • Page 8 PUHZ-SHW80VHA Service Ref. PUHZ-SHW112VHA Single 50Hz, 230V Power supply (phase, cycle, voltage) Max. current Munsell 3Y 7.8/1.1 External finish Linear Expansion Valve Refrigerant control Compressor Hermetic Model ANB33FJMMT Motor output Starter type Inverter Protection devices HP switch, LP switch Discharge thermo, Comp. surface thermo Crankcase heater —...

  • Page 9: Data

    DATA 4-1. REFILLING REFRIGERANT CHARGE (R410A : kg) Piping length (one way) Factory Service Ref. charged PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA Additional charge is required for pipes longer than 10m. 4-2. COMPRESSOR TECHNICAL DATA (at 20 ) PUHZ-SHW80VHA PUHZ-SHW112YHA Service Ref.
  • Page 10 1 , 50 1 , 50 Voltage Current 1.28 1.17 1.68 1.57 2.40 2.29 PUHZ-SHW112VHA Outdoor unit PUHZ-SHW140YHA PUHZ-SHW80VHA PUHZ-SHW112YHA Phase , Hz 1 , 50 1/3 , 50 3 , 50 Voltage 230/400 Current 8.09 8.94 11.10/3.69 11.28/3.74 4.92 4.91...

  • Page 11: Outlines And Dimensions

    OUTLINES AND DIMENSIONS PUHZ-SHW80VHA Unit : mm PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA OCH526...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM PUHZ-SHW80VHA PUHZ-SHW112VHA SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply, Indoor/Outdoor> Reactor Switch<Test Operation> Motor for Compressor Main Smoothing Capacitor Switch<Function Switch, Model Select> MF1, MF2 Fan Motor CY1, CY2 Capacitor Switch<Model Select> 21S4 Solenoid Valve (Four-Way Valve) P .
  • Page 13 PUHZ-SHW112YHA PUHZ-SHW140YHA SYMBOL NAME SYMBOL NAME SYMBOL NAME Terminal Block<Power Supply> Capacitor C. B. Controller Circuit Board Terminal Block<Indoor/Outdoor> Rush Current Protect Resistor Switch<Manual Defrost, Defect History, Motor for Compressor P. B. Power Circuit Board Record Reset, Refrigerant Address > MF1, MF2 Fan Motor TB-U/V/W...

  • Page 14: Wiring Specifications

    WIRING SPECIFICATIONS FIELD ELECTRICAL WIRING (power wiring specifications) SHW80V SHW112V SHW112, 140Y SHW230Y Outdoor unit model ~/N (single), ~/N (single), 3N~ (3 ph 4-wires), 3N~ (3 ph 4-wires), Outdoor unit power supply 50 Hz, 230 V 50 Hz, 230 V 50 Hz, 400 V 50 Hz, 400 V Outdoor unit input capacity Main switch (Breaker)

  • Page 15: Refrigerant System Diagram

    Refrigerant flow in cooling Refrigerant flow in heating Symbol Part 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 16 8-1. Refrigerant collecting (pump down) Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 Supply power (circuit breaker). * When power is supplied, make sure that “CENTRALLY CONTROLLED” is not displayed on the remote controller. If “CEN- TRALLY CONTROLLED”...

  • Page 17: Troubleshooting

    TROUBLESHOOTING 9-1. TROUBLESHOOTING <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the trouble is reoccurring at service, are summarized in the table below.
  • Page 18 Operating procedures While the room temperature display on the remote "TEST RUN" and the currently selected controller is “PLEASE WAIT”, the remote controller is disabled. operation mode are displayed alternately. Wait until “PLEASE WAIT” disappears before using remote controller. 1. Turn on the main power supply. “PLEASE WAIT”...
  • Page 19 Test run [for wireless remote controller] Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M". TEST RUN 1 Turn on the main power to the unit. TEST RUN 2 Press the button twice continuously.

  • Page 20: How To Proceed "Self-Diagnosis

    9-3. HOW TO PROCEED “SELF-DIAGNOSIS” 9-3-1. When a Problem Occurs During Operation If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display. [CHECK] and the refrigerant address are displayed on the temperature display, and the error code and unit number are displayed alternately as shown below.

  • Page 21: Remote Controller Diagnosis

    When the error history is reset, the display will look like the one shown below. Press the button twice within 3 seconds. The self-diagnosis ON/OFF However, if you fail to reset the error history, the error content will be displayed address or refrigerant address will blink.
  • Page 22 9-3-4. Malfunction-diagnosis method by wireless remote controller <In 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 23 • 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 sec. 0.5 sec. 0.5 sec. 0.5 sec.

  • Page 24: Self-Diagnosis Action Table

    9-4. SELF-DIAGNOSIS ACTION TABLE <Abnormalities detected when the power is turned on> (Note 1) Refer to indoor unit section for code P and code E. Abnormal point and detection method Judgment and action Error Code Case 1 No voltage is supplied to terminal 1 Check following items.
  • Page 25 Error Code Abnormal point and detection method Case Judgment and action 2 connector open 1 Disconnection or contact failure 1 Check connection of connector (63H,63L) on Abnormal if both 63H and 63L connector of connector (63H,63L) on outdoor controller circuit board. circuits are open for three minutes outdoor controller circuit board.
  • Page 26 <Abnormalities detected while unit is operating> Abnormal point and detection method Judgment and action Error Code Case 1 Short cycle of indoor unit 1~6 Check indoor unit and repair defect. High pressure (High-pressure switch 2 Clogged filter of indoor unit 63H operated) 3 Decreased airflow caused by Abnormal if high-pressure switch 63H...
  • Page 27 Abnormal point and detection method Case Judgment and action Error Code 1 Disconnection or contact failure 1 Check connection of connector (TH3, TH32, TH33, Open/short of outdoor unit thermistors (TH3, TH32, TH33, TH6, TH7, and TH8) of connectors TH7/6) on the outdoor controller circuit board. Abnormal if open or short is detected Outdoor controller circuit board: Check connection of connector (CN3) on the...
  • Page 28 Abnormal point and detection method Case Judgment and action Error Code To find out the details about U9 error, turn ON SW2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 when U9 error occurs. Detailed To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. codes Refer to 9-10.
  • Page 29 From the previous page. Abnormal point and detection method Case Judgment and action Error Code PFC error (Overvoltage/ Not applicable for SHW80, Check for the switch settings for Model Select Detailed codes Undervoltage/Overcurrent) 112VHA and SHW112, 140YHA on the outdoor controller circuit board. •...
  • Page 30 Abnormal point and detection method Judgment and action Error Code Case 1 Open stop valve. 1 Stop valve of outdoor unit is Compressor overcurrent interruption Abnormal if overcurrent DC bus or closed. 2 Check facility of power supply. 2 Decrease of power supply compressor is detected after compressor starts operating for 30 seconds.
  • Page 31 Error Code Abnormal point and detection method Judgment and action Case Remote controller transmission error (E3)/ 1 Set a remote controller to main, and the 1 2 remote controller are set as signal receiving error (E5) 1 Abnormal if remote controller could not other to sub.
  • Page 32 Error Code Abnormal point and detection method Judgment and action Case Freezing/overheating protection is working 1 Overcharge of refrigerant 12 Check operating condition of refrigerant Overheating protection <Heating mode> 2 Defective refrigerant circuit circuit. Abnormal if condensing temperature of (clogs) pressure sensor (63HS) detects 3 Malfunction of linear expansion valve 3 Check linear expansion valve.
  • Page 33 <M-NET communication error> (Note) “Indoor unit” in the text indicates M-NET board in outdoor unit. Error Code Abnormal point and detection method Case Judgment and action 1 There are 2 or more same Address duplicate definition Search the unit with same address as This error is displayed when transmission abnormality occurred.
  • Page 34 Error Code Abnormal point and detection method Case Judgment and action NO ACK signal Common factor that has no Always try the followings when the error 1. Transmitting side controller detects relation with abnormality source “A7” occurs. 1 The unit of former address abnormal if a message was transmitted 1 Turn off the power supply of outdoor but there is no reply (ACK) that a mes-...
  • Page 35 From the previous page. Error Code Abnormal point and detection method Case Judgment and action 1 During group operation with Same as mentioned in “A7” of the previous 4. If displayed address or attribute is indoor unit of multi-refrigerant remote controller, indoor unit detects page.

  • Page 36: Troubleshooting By Inferior Phenomena

    Error Code Abnormal point and detection method Case Judgment and action 1 Transmitting condition is 1 Check transmission waveform or noise on M-NET NO RESPONSE repeated fault because of Abnormal if a message was transmitted transmission wire. noise and the like. and there were reply (ACK) that message 2 Extinction of transmission wire 2 Turn off the power supply of outdoor unit...
  • Page 37 Phenomena Factor Countermeasure 1 The pair number settings of the wireless remote 4. Even controlling by the wireless 1 Check the pair number settings. remote controller, no beep is heard controller and indoor controller board are and the unit does not start operating. mismatched.
  • Page 38 Phenomena Countermeasure ■ These sounds can be heard when refrigerant and/or water is (are) fl owing A fl owing water sound or occasional hissing sound is heard. in the indoor unit or refrigerant pipe, or when the refrigerant and/or water is (are) chugging.
  • Page 39 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 40: Symptoms: Nothing Is Displayed On The Remote Controller

    LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 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 which is used to connect the indoor unit and the outdoor unit.
  • Page 41 LED display of the indoor controller board Symptoms: Nothing is displayed on the remote controller 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 which is used to connect the indoor unit and the outdoor unit.
  • Page 42 LED display of the indoor controller board LED1 : Symptoms: Nothing is displayed on the remote controller LED2 : LED3 : — Inspection method and Diagnosis flow Cause troubleshooting Check the voltage of the terminal block (TB6) of the remote controller. DC 10V to DC 16V? •...
  • Page 43 • Before repair Frequent calling from customers Phone Calls From Customers How to Respond Note Unit does The operating display of remote 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 44 Phone Calls From Customers How to Respond Note The room cannot be cooled or heated sufficiently. 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 45 Phone Calls From Customers How to Respond Note Something Air blows out for a while after However, this control is also 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 46 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: when pipes or piping joints are cooled, they unit.
  • Page 47 9-6. HOW TO CHECK THE PARTS PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA Parts name Check points Thermistor (TH3) Disconnect the connector then measure the resistance with a tester. <Liquid> (At the ambient temperature 10 ~30 ) Thermistor (TH4) <Discharge> Normal Abnormal Thermistor (TH6) 160k ~410k <2-phase pipe>...
  • Page 48 Check method of DC fan motor (fan motor / outdoor controller circuit board) Notes · High voltage is applied to the connecter (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 49 <Thermistor feature chart> Low temperature thermistors • Thermistor <Liquid> (TH3) • Thermistor <2-phase pipe> (TH6) • Thermistor <Ambient> (TH7) • Thermistor <Suction> (TH32) • Thermistor <Ref. check> (TH33) Thermistor R0 = 15k' ± 3% B constant = 3480 ± 2% =15exp{3480( 273+t –...

  • Page 50: 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 outdoor controller board and the linear expansion valve>...
  • Page 51 (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 52: Emergency Operation

    9-8. EMERGENCY OPERATION (1) When the error codes shown below are displayed on outdoor unit or microprocessor for wired remote controller or indoor unit has a failure, but no other problems are found, emergency operation will be available by setting the emergency opera- tion switch (SWE) on indoor controller board to ON and short-circuiting the connector (CN31) on outdoor controller board.
  • Page 53 (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 Intake temperature (TH1) 20.5 —...

  • Page 54: Test Point Diagram Outdoor Controller Circuit Board

    9-9. TEST POINT DIAGRAM <CAUTION> TEST POINT1 is high voltage. Outdoor controller circuit board PUHZ-SHW80VHA PUHZ-SHW112VHA PUHZ-SHW112YHA PUHZ-SHW140YHA CNDM 1 to 2: Input of low-level sound priority Manual defrost, detect mode history record reset, 1 to 3: CN51 Function switch...
  • Page 55 Outdoor noise filter circuit board PUHZ-SHW112YHA PUHZ-SHW140YHA LI1, LI2, LI3, NI POWER SUPPLY LI1-LI2/LI-LI3/LI3-LI1 : AC400V input LI1-NI/LI2-NI/LI3-NI : AC230V input (Connect to the terminal block (TB1)) Connect to the earth CNAC1, CNAC2 AC230V (Connect to the outdoor controller Connect to the earth circuit board (CNAC)) CNDC (Connect to the...
  • Page 56 * Usually, they are in a state of being short-circuited if they are broken. Outdoor power circuit board Measure the resistance in the following points (connectors, etc.). PUHZ-SHW80VHA If they are short-circuited, it means that they are broken. 1. Check of POWER MODULE...
  • Page 57 Outdoor power circuit board Brief Check of POWER MODULE * Usually, they are in a state of being short-circuited if they are broken. PUHZ-SHW112YHA Measure the resistance in the following points (connectors, etc.). PUHZ-SHW140YHA If they are short-circuited, it means that they are broken. 1.
  • Page 58 Outdoor converter circuit board PUHZ-SHW112YHA PUHZ-SHW140YHA L1-A1 L1-IN, N-IN CK-OU Connect to the ACL1 Connect to the noise filter Connect to the CK capacitor circuit board (LO1, No) Connect to the outdoor power circuit board (CN7) L1-OU, L2-OU, L3-OU L1-A2, L2-A2, L3-A2 Connect to the outdoor power circuit board Connect to the ACL1, ACL2, ACL3 (TB-L1, L2, L3)
  • Page 59 9-10. 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 Forced defrost 1 Start Normal in heating operation.
  • Page 60 ■ The black square ( ) indicates a switch position. Type of Action by the switch operation Switch Function Effective timing Switch No function — — — Power failure Auto recovery No auto recovery When power supply ON automatic recovery *2 No function —...
  • Page 61 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 abnor- mality 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 Error Outdoor controller board Detailed Contents Inspection method code reference LED1 (Green) LED2 (Red) page Check if stop valves are open. 3 blinking 1 blinking Abnormality of discharging P.28 Check if connectors (TH4, LEV-A, and LEV-B) on outdoor controller 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 error code by controlling DIP SW2 on “A-Control Service Tool”.
  • Page 65 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid (TH3) – 40~90 – 40~90 (When the coil thermistor detects 0: or below, “–” and temperature are displayed by turns.) (Example) When -10:;...
  • Page 66 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Pipe temperature / Liquid (TH3) on error – 40~90 occurring (When the coil thermistor detects 0: or below, “–” – 40~90 and temperature are displayed by turns.) (Example) When –15:;...
  • Page 67 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 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.
  • Page 68 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Indoor setting temperature 17~30 17~30 2 3 4 5 6 Pressure saturation temperature (T -39~88 63HS -39~88 (When the temperature is 0: or less, “–” and temperature are displayed by turns.) 2 3 4 5 6 Outdoor outside temperature (TH7)
  • Page 69 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit DC bus voltage 180~370 180~370 (When it is 100V or more, hundreds digit, tens digit and ones digit are displayed by turns.) 2 3 4 5 6 0~255 Capacity save...
  • Page 70 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit 0~480 LEV-A opening pulse on error occurring (When it is 100 pulse or more, hundreds digit, tens 0~480 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 0~255 Discharge superheat on error occurring (When the temperature is 100°C or more, hundreds digit, tens digit and ones digit are displayed by 0~255 turns.) Cooling = TH4-T...
  • Page 72 ■ The black square ( ) indicates a switch position. SW2 setting Display detail Explanation for display Unit Outdoor suction pipe temperature (TH32) -39~88 (When the temperature is 0°C or less, “–” and -39~88 temperature are displayed by turns.) (Example) When –15°C; 0.5 secs.

  • Page 73: Function Setting

    FUNCTION SETTING 10-1. UNIT FUNCTION SETTING BY THE REMOTE CONTROLLER Each function can be set according to necessity 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. <Table 1>...
  • Page 74 (2) Functions are available when setting the unit number to 01-03 or AL (07 in case of wireless remote controller) • When setting functions for an indoor unit in an independent system, set the unit number to 01 referring to 4 Set the indoor unit number of Operating Procedure.
  • Page 75 10-1-1. Selecting functions using the wired remote controller First, try to familiarize yourself with the flow of the function selection procedure. In this section, an example of setting the room temperature detection position is given. For actual operations, refer to steps Setting number Refrigerant address Unit number...
  • Page 76 [Operating Procedure] Check the function selection settings. Changing the function selection settings for each mode will change its relevant mode function. Perform steps through to check all the function selection settings, and then change the settings as necessary. For the initial settings, refer to the <Table 1> in the chapter 12-1. The following is the procedure to operate the remote controller internal sensor. Turn off the remote controller.
  • Page 77 10-1-2. Selecting functions using the wireless remote controller (Type C) Functions can be selected with the wireless remote controller. Function selection using wireless remote controller is available only for refriger- ant system with wireless function. Refrigerant address cannot be specified by the wireless remote controller. [Flow of function selection procedure] Flow of function selection procedure The flow of the function selection procedure is shown below.
  • Page 78 10-2. FUNCTION SELECTION OF REMOTE CONTROLLER The setting of the following remote controller functions can be changed using the remote controller function selection mode. Change the setting when needed. Item 1 Item 2 Item 3 (Setting content) 1.Change language Language setting to display •...
  • Page 79 [Function selection flowchart] Normal display (Display when the air conditioner is not running) Setting language (English) Hold down the button and press the button for 2 seconds. Hold down the button and press the button for 2 seconds. Press the operation mode button. Press theTIMER MENU button.

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

    MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER 11-1. HOW TO "MONITOR THE OPERATION DATA" • Turn on the [Monitoring the operation data] Example) Request code "004" Discharge temperature 69 Refrigerant address "00" A: Maintenance mode B: Refrigerant address C: Data display area D: Request code display area (1) Press the button for 3 seconds so that [ Maintenance mode] appears on the screen (at...
  • Page 81 11-2. 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 11-2-1. 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 11-2-1.Detail Contents in Request Code. Outdoor unit-Control state – Refer to 11-2-1.Detail Contents in Request Code. Compressor-Frequency control state Refer to 11-2-1.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 Fan control data –...
  • Page 85 11-2-1. Detail Contents in Request Code Example) Request code "004" Discharge temperature 69 Refrigerant address "00" A: Maintenance mode display B: Refrigerant address C: Data display area D: Request code display area [Operation state] (Request code ": 0 ") Relay output state Power currently Data display Display...
  • 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 Actuator output state...
  • 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 PSA-RP•GA, PSH-PGAH PKA-RP•FAL(2), PKH-P•FALH See the table on the right. PEAD-RP•EA(2)/GA, PEHD-P•EAH PCA-RP•GA(2), PCH-P•GAH, PLA-RP71-100BA2 SEZ-KA•VA SLZ-KA•VA(L) PCA-RP•HA PKA-RP•GAL, PKH-P•GALH PLA-RP•...

  • Page 90: Easy Maintenance Function

    EASY MAINTENANCE FUNCTION Reduces maintenance work drastically. Enables you to check operation data of the indoor and outdoor units by remote controller. Furthermore, use of maintenance stable-operation control that fixes the operating frequency, allows smooth inspection, even for inverter models. Smooth Mainte- Discharge temperature 64 Conventional inspection work...
  • Page 91 Data measurement When the operation is stabilized, measure operation data as explained below. (4) Press the [TEMP] buttons ( ) to select the desired refrigerant address. [Screen (5) Select the type of data to be displayed. After selecting, go to step (6). Compressor information button MENU...
  • Page 92 12-2. GUIDE FOR OPERATION CONDITION Check Points Inspection item Result Breaker Good Retightened Enter the temperature differences between into Terminal block Outdoor Unit Good Retightened the graph given below. Indoor Unit Good Retightened Operation state is determined according to the plotted areas on (Insulation resistance) the graph.

  • Page 93: Initial Settings For Refrigerant Leakage Detection Function

    12-3. INITIAL SETTINGS FOR REFRIGERANT LEAKAGE DETECTION FUNCTION Remote controller button position This air conditioner (Outdoor unit) can detect refrigerant leakage which may happen during a long period of use. In order to enable the leakage detection, the following settings are required to let the unit memorize the initial condition (initial refregerant amount).
  • Page 94 3. How to start "Judgment of refrigerant leakage " mode. To know the current condition of refrigerant amount, same operation must be performed. Please repeat the same procedure as when "Initial learning operation" for "Checking operation". Press CLOCK button and select the [GAS LEAK JUDGE] Refrigerant leakage Refrigerant leakage detection...

  • Page 95: Disassembly Procedure

    DISASSEMBLY PROCEDURE PUHZ-SHW80VHA PUHZ-SHW112VHA OPERATING PROCEDURE PHOTOS & ILLUSTRATION Top panel fixing screws Photo 1 1. Removing the service panel and top panel Top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide Service panel the hook on the right downward to remove the service fixing screw panel.
  • Page 96 OPERATING PROCEDURE PHOTOS 4. Removing the thermistor <2-phase pipe> (TH6) and Electrical Photo 4-1 Clamps parts box thermistor <Ambient>(TH7) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connectors TH7/6 (red) on the controller circuit board in the electrical parts box.
  • Page 97 OPERATING PROCEDURE PHOTOS 7. Removing the 4-way valve coil (21S4), and linear expansion Photo 7 valve coil (LEV-A, LEV-B, LEV-C) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) [Removing the 4-way valve coil] Linear expansion Linear expansion High pressure...
  • Page 98 OPERATING PROCEDURE PHOTOS 11. Removing the reactor (DCL) and capacitor (CB) Photo 8 (1) Remove the service panel. (See Photo 1) Reactor Electrical parts box (2) Remove the top panel. (See Photo 1) (DCL) (3) Remove the electrical parts box. (See Photo 3) [Removing the reactor] (4) Remove 4 reactor fixing screws (4 ×...
  • Page 99 OPERATING PROCEDURE PHOTOS 13. Removing the power receiver Photo 10 Pipes of power receiver (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel.
  • Page 100 PUHZ-SHW112YHA PUHZ-SHW140YHA OPERATING PROCEDURE PHOTOS & ILLUSTRATION Top panel fixing screws Photo 1 1. Removing the service panel and top panel Top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide Service panel the hook on the right downward to remove the service fixing screw panel.
  • Page 101 OPERATING PROCEDURE PHOTOS & ILLUSTRATION 4. Disassembling the electrical parts box (1) Disconnect all the connectors on the controller circuit Electrical board. parts box Photo 4-1 (2) Remove the 3 screws, screw 1, 2 and 3, that fix the plate equipped with the outdoor controller circuit board, and the electrical parts box, screw 1 from the front and the screw 2 and 3 from the bottom of the electrical parts box.
  • Page 102 OPERATING PROCEDURE PHOTOS 5. Removing the thermistor <2-phase pipe> (TH6) and Electrical Photo 5-1 Clamps parts box thermistor <Ambient>(TH7) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disconnect the connectors TH7/6 (red) on the controller circuit board in the electrical parts box.
  • Page 103 OPERATING PROCEDURE PHOTOS 8. Removing the 4-way valve coil (21S4), and linear expansion Photo 8 valve coil (LEV-A, LEV-B, LEV-C) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) [Removing the 4-way valve coil] Linear expansion Linear expansion High pressure...
  • Page 104 OPERATING PROCEDURE PHOTOS 12. Removing the reactors (ACL1, ACL2, ACL3) Photo 12-1 Electrical parts box (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the 6 screws, that fix the front panel and remove the front panel.
  • Page 105 OPERATING PROCEDURE PHOTOS 13. Removing the compressor (MC) Photo 13 (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) Separator Valve bed (3) Remove 2 front cover panel fixing screws (5 × 12) and remove the front cover panel.
  • Page 106 HEAD OFFICE : TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN CCopyright 2012 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Sep. 2012 No.OCH526 New publication, effective Sep. 2012 Made in Japan Specifications are subject to change without notice.

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