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Mitsubishi Electric PEAD Series Service Manual
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Mitsubishi Electric PEAD Series Service Manual

Ceiling concealed split-type, heat pump air conditioners
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
2016
SERVICE MANUAL
Series PEAD
Model name
<Indoor unit>
PEAD-A12AA7
PEAD-A18AA7
PEAD-A24AA7
PEAD-A30AA7
PEAD-A36AA7
PEAD-A42AA7
INDOOR UNIT

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Summary of Contents for Mitsubishi Electric PEAD Series

  • Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS 2016 SERVICE MANUAL Series PEAD Model name <Indoor unit> PEAD-A12AA7 PEAD-A18AA7 PEAD-A24AA7 PEAD-A30AA7 PEAD-A36AA7 PEAD-A42AA7 INDOOR UNIT...

  • Page 2: Table Of Contents

    CONTENTS 1. SAFETY PRECAUTION ··········································································· 3 2. PART NAMES AND FUNCTIONS ······························································ 4 3. SPECIFICATION ···················································································· 5 4. FAN PERFORMANCE AND CORRECTED AIR FLOW ·································· 8 5. SOUND PRESSURE LEVELS ·································································15 6. OUTLINES & DIMENSIONS ····································································21 7. WIRING DIAGRAM ················································································23 8.

  • Page 3: Safety Precaution

    SAFETY PRECAUTION 1. SAFETY PRECAUTION 1-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 1-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrigerant the followings.

  • Page 4: Part Names And Functions

    PART NAMES AND FUNCTIONS Unit Gravimeter <3> Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications. (UNF1/2) Use high-tension side pressure of 5.3MPa·G or over. 2 Charge hose Only for R410A Use pressure performance of 5.09MPa·G or over.

  • Page 5: Specification

    SPECIFICATION 3. SPECIFICATION Service Ref. PEAD-A12AA7 Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V Max. Fuse Size Min. Circuit Ampacity 1.45 Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan × 1 Fan motor output 0.085 Fan motor F.L.A...
  • Page 6 SPECIFICATION Service Ref. PEAD-A24AA7 Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V Max. Fuse Size Min. Circuit Ampacity 2.63 Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan × 2 Fan motor output 0.121 Fan motor F.L.A 2.10 /min (CFM)
  • Page 7 SPECIFICATION Service Ref. PEAD-A36AA7 Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V Max. Fuse Size Min. Circuit Ampacity 3.30 Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan × 2 Fan motor output 0.244 Fan motor F.L.A 2.64 /min (CFM)

  • Page 8: Fan Performance And Corrected Air Flow

    FAN PERFORMANCE AND CORRECTED AIR FLOW 4. FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A12AA7 PEAD-A12AA7 (External static pressure 35Pa) 208-230V 60Hz (External static pressure 100Pa) 208-230V 60Hz [0.241] [0.602] Limit [0.201] Limit Rated point Rated point [0.161] [0.401] High High [0.120] Middle Middle...
  • Page 9 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A18AA7 PEAD-A18AA7 (External static pressure 35Pa) 208-230V 60Hz (External static pressure 100Pa) 208-230V 60Hz [0.241] [0.602] [0.201] Limit Limit High Rated point [0.161] [0.401] High Rated point Middle [0.120] Middle [0.201] [0.080] [0.040] [353] [530] [706] [353]...
  • Page 10 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A24AA7 PEAD-A24AA7 (External static pressure 35Pa) 208-230V 60Hz (External static pressure 100Pa) 208-230V 60Hz [0.241] [0.602] [0.201] Limit Limit Rated point [0.161] [0.401] Rated point High [0.120] High Middle [0.080] Middle [0.201] [0.040] [353] [530] [706] [883]...
  • Page 11 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A30AA7 PEAD-A30AA7 (External static pressure 35Pa) 208-230V 60Hz (External static pressure 100Pa) 208-230V 60Hz [0.281] [0.602] [0.241] Limit High Limit Rated point [0.201] High [0.401] [0.161] Rated point Middle Middle [0.120] [0.201] [0.080] [0.040] [353] [530] [706]...
  • Page 12 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A36AA7 PEAD-A36AA7 (External static pressure 35Pa) 208-230V 60Hz (External static pressure 100Pa) 208-230V 60Hz [0.281] [0.602] Limit Limit [0.241] High [0.201] Rated point [0.401] Middle [0.161] Rated point [0.120] High Middle [0.201] [0.080] [0.040] [353] [530] [706]...
  • Page 13 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A42AA7 PEAD-A42AA7 (External static pressure 35Pa) 208-230V 60Hz (External static pressure 100Pa) 208-230V 60Hz [0.281] [0.803] Limit Limit High [0.241] Middle High [0.602] [0.201] [0.161] Middle Rated point Rated point [0.401] [0.120] [0.080] [0.201] [0.040] [530] [706]...
  • Page 14 FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-A12,18,24,30,36,42AA7 Air filter 208-230V 60Hz [0.060] A36,42 [0.040] A24,30 A12,18 [0.020] [353] [706] [1059] [1412] Airflow rate(m /min)[cfm] HWE16080...

  • Page 15: Sound Pressure Levels

    SOUND PRESSURE LEVELS 5. SOUND PRESSURE LEVELS 5-1. Sound pressure level Aux. duct Ceiling concealed test unit Measurement location 5-2. NC curves PEAD-A12AA7 External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0...
  • Page 16 SOUND PRESSURE LEVELS PEAD-A18AA7 External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0...
  • Page 17 SOUND PRESSURE LEVELS PEAD-A24AA7 External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0...
  • Page 18 SOUND PRESSURE LEVELS PEAD-A30AA7 External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0...
  • Page 19 SOUND PRESSURE LEVELS PEAD-A36AA7 External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0...
  • Page 20 SOUND PRESSURE LEVELS PEAD-A42AA7 External static pressure 0.14 [in.WG] (35Pa) External static pressure 0.40 [in.WG] (100Pa) 70.0 70.0 High High Middle Middle 65.0 65.0 60.0 60.0 NC-60 NC-60 55.0 55.0 50.0 50.0 NC-50 NC-50 45.0 45.0 40.0 40.0 NC-40 NC-40 35.0 35.0 30.0...

  • Page 21: Outlines & Dimensions

    OUTLINES & DIMENSIONS 6. OUTLINES & DIMENSIONS INDOOR UNIT PEAD-A12, 18, 24, 30, 36, 42AA7 HWE16080...
  • Page 22 OUTLINES & DIMENSIONS HWE16080...

  • Page 23: Wiring Diagram

    WIRING DIAGRAM 7. WIRING DIAGRAM PEAD-A12, 18, 24, 30, 36, 42AA7 TRANSMISSION WIRES INSIDE SECTION OF CONTROL BOX TB15 DC12V R.B. TO OUTDOOR I.B. UNIT CN32 (RED) (BLUE) CN105 CN3C P.B. CN41 (BLACK) LED2 (RED) CN2A CN90 MODEL (RED) CN25 CNER PEAD-A12AA7 (BLUE)

  • Page 24: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM 8. REFRIGERANT SYSTEM DIAGRAM PEAD-A12, 18, 24, 30, 36, 42AA7 Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./ Eva.temperature) Refrigerant flow in cooling Refrigerant flow in heating Refrigerant LIQUID pipe connection (Flare) Thermistor TH2 Pipe temperature(Liquid) Thermistor TH1 (Room temperature)

  • Page 25: Heater Control

    HEATER CONTROL 9. HEATER CONTROL 9-1. CONTROL SPECIFICATIONS AND FUNCTION SETTING 9-1-1. Operation 1st heater turns ON when A and B of following conditions have been satisfied. 2nd heater turns ON when A, B and Cof following conditions have been satisfied. A:One of below conditions has been satisfied.
  • Page 26 HEATER CONTROL 9-2. FAN CONTROLL By setting the Mode No. 11 in the Function Table in section 9-1 and using CN4Y on the optional parts PAC-YU25HT, the following patterns of fan control will become possible when [DEFROST] or [ERROR] is displayed. Fan control patterns when [DEFROST] or [ERROR] is displayed Heater is installed in the duct.
  • Page 27 HEATER CONTROL (3) Locally procured wiring Indoor unit Remote control board Relay circuit Adapter control board CN24 White CN4Y White Electric Heater or panel heater (applicable only when a panel heater is connected) Maximum cable length Preparations in the field is 10 m (32ft) Rated voltage: 12VDC Power consumption: 0.9W or less...

  • Page 28: Troubleshooting

    TROUBLESHOOTING 10. TROUBLESHOOTING 10-1. CAUTIONS ON TROUBLESHOOTING (1) Before troubleshooting, check the followings: Check the power supply voltage. Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn off the breaker.
  • Page 29 TROUBLESHOOTING 10-2. SELF-CHECK FUNCTION Refer to the installation manual that comes with each remote controller for details. RF thermostat is not established. [Output pattern A] Errors detected by indoor unit IR wireless remote Wired remote controller controller RF thermostat Symptom Remark Beeper sounds/OPERATION INDICATOR lamp flashes...
  • Page 30 TROUBLESHOOTING If the unit cannot be operated properly after the test run has been performed, refer to the following table to remove the cause. Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) For about 2 After LED 1, 2 are lighted, LED 2 is For about 2 minutes after power-on, operation of minutes PLEASE WAIT...
  • Page 31 TROUBLESHOOTING 10-3. SELF-DIAGNOSIS ACTION TABLE Note: Refer to the manual of outdoor unit for the details of display such as F, U, and other E. Error Code Abnormal point and detection method Cause Countermeasure 1 Defective thermistor 1– 3 Check resistance value of thermistor. Room temperature thermistor (TH1) 1 The unit is in three-minute resume characteristics...
  • Page 32 TROUBLESHOOTING Error Code Abnormal point and detection method Cause Countermeasure Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. working 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
  • Page 33 TROUBLESHOOTING Error Code Abnormal point and detection method Cause Countermeasure 1 Defective thermistor 1–3 Check resistance value of thermistor. Abnormality of pipe temperature thermistor / Condenser-Evaporator characteristics For characteristics, refer to (P1) above. 2 Contact failure of connector 2 Check contact failure of connector (CN44) (TH5) 1 The unit is in three-minute resume (CN44) on the indoor controller...
  • Page 34 TROUBLESHOOTING Error Code Abnormal point and detection method Cause Countermeasure 1 Contact failure, short circuit or, Indoor/outdoor unit communication * Check LED display on the outdoor control error (Signal receiving error) circuit board. (Connect A-control service tool, mis-wiring (converse wiring) of 1 Abnormal if indoor controller board indoor/outdoor unit connecting cannot receive any signal normally for...
  • Page 35 TROUBLESHOOTING 10-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure When LED1 on indoor controller board is (1) LED2 on indoor controller board is also off. off. 1 Power supply of rated voltage is not 1 Check the voltage of outdoor power supplied to outdoor unit.
  • Page 36 TROUBLESHOOTING 10-5. TEST POINT DIAGRAM 10-5-1. Power supply board PEAD-A12AA7 PEAD-A18AA7 PEAD-A24AA7 PEAD-A30AA7 PEAD-A36AA7 PEAD-A42AA7 Power supply voltage (208 - 230VAC) CNMF Fan motor output 1 - 4: 310 - 340 VDC 5 - 4: 15 VDC 6 - 4: 0 - 6.5 VDC 7 - 4: Stop 0 or 15 VDC Run 7.5 VDC (0 - 15 pulse)
  • Page 37 TROUBLESHOOTING 10-5-2. Indoor controller board PEAD-A12AA7 PEAD-A18AA7 PEAD-A24AA7 PEAD-A30AA7 PEAD-A36AA7 PEAD-A42AA7 Emergency operation CN105 CN22 Model selection Capacity setting CNXA2 CN105 Radio frequency interface CNXC2 CNXB2 CN32 Remote start/stop adapter CN41 CN22 For MA remote controller cabel CN51 connection (10 - 13 VDC (Between 1 and 3.)) CN32 CN51 Centralized control...
  • Page 38 TROUBLESHOOTING 10-6. TROUBLE CRITERION OF MAIN PARTS PEAD-A12AA7 PEAD-A18AA7 PEAD-A24AA7 PEAD-A30AA7 PEAD-A36AA7 PEAD-A42AA7 Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (TH1) Normal Abnormal Pipe temperature Opened or short-circuited thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5) Wiring diagram Motor...
  • Page 39 TROUBLESHOOTING 10-8. DC FAN MOTOR (FAN MOTOR/INDOOR CONTROLLER BOARD) Check method of DC fan motor (fan motor/indoor controller circuit board) 1 Notes High voltage is applied to the connecter (CNMF) for the fan motor. Give 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.) 2 Self check Symptom : The indoor fan cannot turn around.
  • Page 40 TROUBLESHOOTING 10-9. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE Each function is controlled by the dip switch and the jumper wire on control p.c. board. SW1 and SW2 are equipped only for service parts. Model setting and capacity setting are memorized in the nonvolatile memory of the control p.c. board of the unit. (Marks in the table below) Jumper wire ( ○: Short ×: Open) Jumper wire...

  • Page 41: Disassembly Procedure

    DISASSEMBLY PROCEDURE 11. DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. PEAD-A12AA7 PEAD-A18AA7 PEAD-A24AA7 PEAD-A30AA7 PEAD-A36AA7 PEAD-A42AA7 1. Control box 1. Removing the control box cover (1) Remove the two fixing screws on the cover (A) to remove it. Fig. 1 Fig.
  • Page 42 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. 3. Drainpan 1. Removing the filter and the bottom plate (1) Push up the tab on the filter, and pull out the filter in the direction of the arrow 1. (2) Remove the fixing screws on the bottom plate (D), (E) to remove it.
  • Page 43 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. 4. Thermistor (Condenser/evaporator) (Liquid pipe) 1. Remove the drain pan according to the procedure in section 3. 2. Removing the Heat exchanger cover (1) Remove the four fixing screws on the heat exchanger cover (F) to remove it.
  • Page 44 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. 5. Fan and fan motor 1. Removing the filter and the bottom plate (1) Push down the tab on the filter, and pull out the filter in the direction of the arrow 1. (2) Remove the fixing screws on the bottom plate (J) to remove it.
  • Page 45 DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. 6. Heat exchanger 1. Remove the drain pan according to the procedure in section 3. 2. Remove the heat exchanger cover according to the procedure in section 4.2. 3. Removing the cover (1) Remove the five fixing screws on the cover Fig.
  • Page 46 HWE16080...
  • Page 47 HWE16080...
  • Page 48 www.MitsubishiElectric.com New publication effective Nov. 2016 Specifications subject to change without notice HWE16080...

This manual is also suitable for:

Pead-a30aa7Pead-a36aa7Pead-a42aa7Pead-a18aa7Pead-a12aa7Pead-a24aa7

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