SPLIT-TYPE, HEAT PUMP 2009 AIR CONDITIONERS SERVICE MANUAL Series PEAD R410A <indoor unit> Service ref. NOTE: Models PEAD-RP35JA(L) • This manual describes only service data of the indoor PEAD-RP50JA(L) units. PEAD-RP60JA(L) PEAD-RP71JA(L) PEAD-RP100JA(L) PEAD-RP125JA(L) PEAD-RP140JA(L) CONTENTS 1. REFERENCE MANUAL ····························· 2 2.
SAFETY PRECAUTION 2-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 2-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use 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.
Unit Gravimeter  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 ·...
Wired remote controller “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.
OUTLINES & DIMENSIONS INDOOR UNIT PEAD-RP35, 50, 60, 71, 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-RP60·71·100·125·140JA models,which have 2 fans. PEAD-RP35·50JA models have 1 fan.
PEAD-RP35, 50, 60, 71, 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-RP60·71·100·125·140JAL models, which have 2 fans. PEAD-RP35·50JAL models have 1 fan.
TROUBLESHOOTING 10-1. 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.
• 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 PLEASE WAIT minutes after...
[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 E6, E7 Indoor/outdoor unit communication error Drain sensor error Drain pump error...
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.
Note: Refer to the manual of outdoor unit for the details of display 10-3. 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"...
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.
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.
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...
10-4. 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. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
10-5. TEST POINT DIAGRAM 10-5-1. Power supply board PEAD-RP35JA(L) PEAD-RP50JA(L) PEAD-RP60JA(L) PEAD-RP71JA(L) PEAD-RP100JA(L) PEAD-RP125JA(L) PEAD-RP140JA(L) 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)
10-5-2. Indoor controller board PEAD-RP35JA(L) PEAD-RP50JA(L) PEAD-RP60JA(L) PEAD-RP71JA(L) PEAD-RP100JA(L) PEAD-RP125JA(L) PEAD-RP140JA(L) 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...
10-6. TROUBLE CRITERION OF MAIN PARTS PEAD-RP35JA(L) PEAD-RP50JA(L) PEAD-RP60JA(L) PEAD-RP71JA(L) PEAD-RP100JA(L) PEAD-RP125JA(L) PEAD-RP140JA(L) 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...
10-8. 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...
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.
DISASSEMBLY PROCEDURE Exercise caution when removing heavy parts. PEAD-RP35JA(L) PEAD-RP50JA(L) PEAD-RP60JA(L) PEAD-RP71JA(L) PEAD-RP100JA(L) PEAD-RP125JA(L) PEAD-RP140JA(L) 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.
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.
Exercise caution when removing heavy parts. 4. Thermistor (Condenser/evaporator) (Liquid pipe) 1. Remove the drain pan according to the proce- dure in section . 2. Removing the Heat exchanger cover (1) Remove the four fixing screws on the heat exchanger cover (F) to remove it. Fig.
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.
Exercise caution when removing heavy parts. 6. Heat exchanger 1. Remove the drain pan according to the proce- dure in section . 2. Remove the heat exchanger cover according to the procedure in section  2. 3. Removing the cover (1) Remove the five fixing screws on the cover (K) to remove it.
New publication, effective Apr. 2009. HWE08130 Specifications subject to change without notice. Printed in Japan...