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Mitsubishi Electric Mr. Slim PEAD-SP71JA Service Manual
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Mitsubishi Electric Mr. Slim PEAD-SP71JA Service Manual

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SPLIT-TYPE, HEAT PUMP
AIR CONDITIONERS
SERVICE MANUAL
Series PEAD
<indoor unit>
Models
PEAD-SP71JA(L)
PEAD-SP100JA(L)
PEAD-SP125JA(L)
PEAD-SP140JA(L)
INDOOR UNIT
TEMP.
ON/OFF
REMOTE CONTROLLER (option)
R410A
CONTENTS
1. SAFETY PRECAUTION ····························· 2
2. PART NAMES AND FUNCTIONS ·············· 3
3. SPECIFICATION ········································ 5
5. SOUND PRESSURE LEVELS ···················11
6. OUTLINES & DIMENSIONS ······················15
7. WIRING DIAGRAM ····································18
9. TROUBLESHOOTING ·······························20
10. DISASSEMBLY PROCEDURE ··················34
2014
NOTE:
• This manual describes only
service data of the indoor
units.
TM

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  • Page 1: Table Of Contents

    SPLIT-TYPE, HEAT PUMP 2014 AIR CONDITIONERS SERVICE MANUAL Series PEAD R410A <indoor unit> NOTE: Models PEAD-SP71JA(L) • This manual describes only service data of the indoor PEAD-SP100JA(L) units. PEAD-SP125JA(L) PEAD-SP140JA(L) CONTENTS 1. SAFETY PRECAUTION ····························· 2 2. PART NAMES AND FUNCTIONS ·············· 3 3.

  • Page 2: Safety Precaution

    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 refrige- the followings.

  • Page 3: Part Names And Functions

    Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool name Specifications Gauge manifold · Only for R410A · Use the existing fitting specifications. (UNF1/2) · Use high-tension side pressure of 5.3MPa·G or over. Charge hose ·...
  • Page 4 Wired remote controller (option) “Sensor” indication Display Section Displayed when the remote controller sensor is used. Day-of-Week For purposes of this explanation, Shows the current day of the week. all parts of the display are shown as lit. During actual operation, only Time/Timer Display the relevant items will be lit.

  • Page 5: Specification

    SPECIFICATION Service Ref. PEAD-SP71JA(L) Mode Cooling Heating Power supply Single phase, 50, 60Hz, 220-240V ❇ Input 0.17 ( 0.15 ) 0.15 ❇ Running Current 1.28 ( 1.17 ) 1.17 External finish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan ×...
  • Page 6 Service Ref. PEAD-SP140JA(L) Cooling Heating Mode Power supply Single phase, 50, 60Hz, 220-240V ❇ Input 0.39 ( 0.37 ) 0.37 ❇ Running Current 2.60 ( 2.49 ) 2.49 External finish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan ×...

  • Page 7: Fan Performance And Corrected Air Flow

    FAN PERFORMANCE AND CORRECTED AIR FLOW PEAD-SP71JA(L) PEAD-SP71JA(L) (External static pressure 35Pa) 220-240V 50/60Hz (External static pressure 100Pa) 220-240V 50/60Hz High Rated point Limit Limit High Middle Rated point Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-SP71JA(L) PEAD-SP71JA(L) (External static pressure 50Pa) 220-240V 50/60Hz (External static pressure 150Pa) 220-240V 50/60Hz High Rated point...
  • Page 8 PEAD-SP100JA(L) PEAD-SP100JA(L) (External static pressure 35Pa) 220-240V 50/60Hz (External static pressure 100Pa) 220-240V 50/60Hz Limit High Limit Rated point Middle Rated point High Middle Airflow rate(m /min) Airflow rate(m /min) PEAD-SP100JA(L) PEAD-SP100JA(L) (External static pressure 50Pa) 220-240V 50/60Hz (External static pressure 150Pa) 220-240V 50/60Hz High Limit Rated point...
  • Page 9 PEAD-SP125JA(L) PEAD-SP125JA(L) (External static pressure 35Pa) 220-240V 50/60Hz (External static pressure 100Pa) 220-240V 50/60Hz Limit High Limit High Middle Middle Rated point Rated point Airflow rate(m /min) Airflow rate(m /min) PEAD-SP125JA(L) PEAD-SP125JA(L) (External static pressure 50Pa) 220-240V 50/60Hz (External static pressure 150Pa) 220-240V 50/60Hz High High Limit...
  • Page 10 PEAD-SP140JA(L) PEAD-SP140JA(L) (External static pressure 35Pa) 220-240V 50/60Hz (External static pressure 100Pa) 220-240V 50/60Hz Limit High High Limit Middle Middle Rated point Rated point Airflow rate(m /min) Airflow rate(m /min) PEAD-SP140JA(L) PEAD-SP140JA(L) (External static pressure 50Pa) 220-240V 50/60Hz (External static pressure 150Pa) 220-240V 50/60Hz High Limit High...

  • Page 11: Sound Pressure Levels

    SOUND PRESSURE LEVELS 5-1. Sound pressure level Ceiling concealed Aux. duct test unit Measurement location 5-2. NC curves PEAD-SP71JA(L) (External static pressure 35Pa) (External static pressure 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...
  • Page 12 PEAD-SP100JA(L) (External static pressure 35Pa) (External static pressure 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 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 13 PEAD-SP125JA(L) (External static pressure 35Pa) (External static pressure 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 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...
  • Page 14 PEAD-SP140JA(L) (External static pressure 35Pa) (External static pressure 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 30.0 NC-30 NC-30 25.0 25.0 20.0 20.0...

  • Page 15: Outlines & Dimensions

    OUTLINES & DIMENSIONS INDOOR UNIT PEAD-SP71, 100, 125, 140JA NOTE 1. Use M10 screw for the Suspension bolt (field supply). 2. Keep the service space for the maintenance at the bottom. 3. This chart indicates for PEAD-SP71·100·125·140JA models,which have 2 fans. 4.
  • Page 16 PEAD-SP71, 100, 125, 140JAL NOTE 1. Use M10 screw for the Suspension bolt (field supply). 2. Keep the service space for the maintenance at the bottom. 3. This chart indicates for PEAD-SP71·100·125·140JAL models, which have 2 fans. 4. In case of the inlet duct is used, remove the air filter (supply with the unit), then install the filter (field supply) at suction side.
  • Page 17 PEAD-SP71, 100, 125, 140JAL Secure enough access space to allow for the maintenance, inspection, and replacement of the motor, fan, drain pump, heat exchanger, and electric box in one of the following ways. Select an installation site for the indoor unit so that its maintenance access space will not be obstructed by beams or other objects.

  • Page 18: Wiring Diagram

    WIRING DIAGRAM PEAD-SP71, 100, 125, 140JA(L) INSIDE SECTION OF CONTROL BOX TB15 TO MA REMOTE CONTROLLER I.B. TO OUTDOOR UNIT CN32 P.B. CN105 CN3C LED2 (Red) (Blue) ❈ CN41 (Red) CN2A (Black) CN51 CN22 (Blue) ZNR01 ZNR02 CN90 (Blue) CNXB2 LED1 (Blue) LED3...

  • Page 19: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PEAD-SP71, 100, 125, 140JA(L) 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) Strainer (#50) Distributor with strainer (#50)

  • Page 20: Troubleshooting

    TROUBLESHOOTING 9-1. CAUTIONS ON TROUBLESHOOTING (1) Before troubleshooting, check the followings: 1 Check the power supply voltage. 2 Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. 1 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 21 • 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 •For about 2 minutes after power-on,op- After LED 1, 2 are lighted, LED 2 is turned off, then only LED 1 is PLEASE WAIT...
  • Page 22 [Output pattern A] Errors detected by indoor unit Wired remote Wireless remote controller controller Symptom Remark Beeper sounds/OPERATION INDICATOR lamp flashes Check code (Number of times) Intake sensor error Pipe (Liquid or 2-phase pipe) sensor error P2, P9 Indoor/outdoor unit communication error E6, E7 Drain sensor error Drain pump error...
  • Page 23 For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table. LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit. LED 2 (power for remote controller) Indicates whether power is supplied to the remote controller.
  • Page 24 Note: Refer to the manual of outdoor unit for the details of display 9-3. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Abnormal point and detection method Countermeasure Error Code Cause Room temperature 1 Defective thermistor 1–3 Check resistance value of thermistor. thermistor (TH1) characteristics 0: ······15.0k"...
  • Page 25 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
  • Page 26 Abnormal point and detection method Countermeasure Error Code Cause Abnormality of pipe temperature ther- 1 Defective thermistor 1–3 Check resistance value of thermistor. mistor/Condenser-Evaporator (TH5) For characteristics, refer to (P1) above. characteristics 2 Check contact failure of connector (CN44) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
  • Page 27 Abnormal point and detection method Countermeasure Error Code Cause ∗ Check LED display on the outdoor control cir- Indoor/outdoor unit communication 1 Contact failure, short circuit or, error (Signal receiving error) cuit board. (Connect A-control service tool, mis-wiring (converse wiring) of 1 Abnormal if indoor controller board PAC-SK52ST.) indoor/outdoor unit connecting...
  • Page 28 9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power is off.
  • Page 29 9-5. TEST POINT DIAGRAM 9-5-1. Power supply board Power supply voltage (220 - 240VAC) 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) Drain-up mechanism output (200VAC)
  • Page 30 9-5-2. Indoor controller board CN22 Emergency operation Model selection CNXA2 Capacity setting CN32 Remote start/stop adapter CNXC2 CN22 For MA remote controller cable con- CNXB2 nection (10 - 13 VDC (Between 1 and 3.)) CN41 CN51 Centralized control CN51 CN41 JAMA standard HA terminal A CN32 CN44 Thermistor (liquid/condenser/evaporator...
  • Page 31 9-6. TROUBLE CRITERION OF MAIN PARTS Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (Part temperature 10°C ~ 30°C) (TH1) Normal Abnormal Pipe temperature 4.3kΩ~9.6kΩ Opened or short-circuited thermistor/liquid (TH2) Condenser/evaporator temperature thermistor (TH5) Wiring diagram Motor...
  • Page 32 9-8. DC FAN MOTOR (FAN MOTOR/INDOOR CONTROLLER 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. 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.) Self check...
  • Page 33 9-9. 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.

  • Page 34: Disassembly Procedure

    DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. 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. 2 2. Thermistor (Intake air) 1. Remove the control box cover according to the procedure in section 1.1.(1).
  • Page 35 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 36 Exercise caution when removing heavy parts. 4. Thermistor (Condenser/evaporator) (Liquid pipe) 1. Remove the drain pan according to the proce- dure in section 3. 2. Removing the Heat exchanger cover (1) Remove the four fixing screws on the heat exchanger cover (F) to remove it. Fig.
  • Page 37 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 38 Exercise caution when removing heavy parts. 6. Heat exchanger 1. Remove the drain pan according to the proce- dure in section 3. 2. Remove the heat exchanger cover according to the procedure in section 4.2.(1). 3. Removing the cover (1) Remove the five fixing screws on the cover (K) to remove it.
  • Page 40 http://Global.MitsubishiElectric.com New publication effective June 2014 HWE14010 Specifications subject to change without notice...

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