Back to Index SPLIT-TYPE, HEAT PUMP 2005 AIR CONDITIONERS SERVICE MANUAL Series PEAD R407C/R410A <indoor unit> Service ref. NOTE: Models PEAD-RP35EA( • This manual describes only service data of the indoor PEAD-RP50EA units. PEAD-RP60EA PEAD-RP71EA PEAD-RP100EA( PEAD-RP125EA PEAD-RP140EA CONTENTS 1. REFERENCE MANUAL ····························· 2 2.
SAFETY PRECAUTION CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R407C Do not use the existing refrigerant piping. Use liquid refrigerant to charge the system. The old refrigerant and lubricant in the existing piping If gas refrigerant is used to seal the system, the composition contains a large amount of chlorine which may cause the of the refrigerant in the cylinder will change and performance lubricant deterioration of the new unit.
 Service tools Use the below service tools as exclusive tools for R407C refrigerant. Tool name Specifications Gauge manifold ·Only for R407C. ·Use the existing fitting SPECIFICATIONS. (UNF7/16) ·Use high-tension side pressure of 3.43MPa·G or over. Charge hose ·Only for R407C. ·Use pressure performance of 5.10MPa·G or over.
CAUTIONS RELATED TO NEW REFRIGERANT <Cautions for units utilizing 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 following.
 Additional refrigerant charge When charging directly from cylinder Ensure that the cylinder for R410A is syphon type. Charging should be performed with the syphon cylinder type stood vertically. (Refrigerant must be charged from liquid phase.) Unit Gravimeter  Service tools Use the below service tools as exclusive tools for R410A refrigerant.
PART NAMES AND FUNCTIONS Indoor Unit • Air intake (sucks the air inside the room into the unit) Air outlet In case of rear inlet In case of bottom inlet Only RP35~60EA RP35EA...
• Remote controller Once the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. • Operation buttons ON/OFF button Set Temperature buttons Down Fan Speed button Timer Menu button (Monitor/Set button) Filter button (<Enter>...
SPECIFICATION Service Ref. PEAD-RP35EA PEAD-RP35EA Power supply Single phase, 50Hz, 220-240V Input 0.13 0.14 Running current 0.55 0.61 Starting current External ﬁnish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Centrifugal (direct) × 2 Fan motor output 0.043...
Service Ref. PEAD-RP71EA Power supply Single phase, 50Hz, 220-240V Input 0.35 Running current 1.55 Starting current External ﬁnish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Centrifugal (direct) × 2 Fan motor output 0.15 Airﬂow (Lo-Hi) /min <CFM> 20-25<706-883>...
Service Ref. PEAD-RP140EA Power supply Single phase, 50Hz, 220-240V Input 0.61 Running current 2.69 Starting current External ﬁnish Galvanized sheets Heat exchanger Plate fin coil Fan (drive) × No. Centrifugal (direct) × 2 Fan motor output 0.27 Airﬂow (Lo-Hi) /min <CFM> 36.5-46<1,288-1,624>...
TROUBLESHOOTING 10-1. 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 or controller board of outdoor unit. Actions to be taken for service and the inferior phenomenon reoccurrence at field are summarized in the table below. Check the contents below before investigating details.
Note: Refer to the manual of outdoor unit for the details of display 10-2. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Error Code Meaning of error code and detection method Countermeasure Cause 1 Defective thermistor 1–3 Check resistance value of thermistor. Abnormality of room temperature thermistor (TH1) characteristics.
Error Code Meaning of error code and detection method Countermeasure Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogs of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
Error Code Meaning of error code and detection method Countermeasure 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 (CN29) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
Error Code Meaning of error code and detection method Countermeasure 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...
10-3. 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.
Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (2)LED2 on indoor controller board • When LED1 on indoor controller board is also blinking. Check indoor/outdoor unit connecting wire Connection failure of indoor/outdoor unit connecting for connection failure.
10-4. When wired remote controller or indoor unit micro computer troubles 1. If there is not any other wrong when trouble occurs, emergency operation starts as the indoor controller board switch (SWE) is set to ON. During the emergency operation the indoor unit is as follows; (1) Indoor fan high speed operation (2) Drain-up machine operation 2.
10-5. HOW TO CHECK THE PARTS Parts name Check points Room temperature Disconnect the connector then measure the resistance using a tester. thermistor (TH1) (Surrounding temperature 10:~30:) Pipe temperature thermistor (TH2) Normal Abnormal (Refer to the thermistor) Condenser/Evaporator 4.3k"~9.6k" Open or short temperature thermistor (TH5) <Thermistor Characteristic graph>...
10-6.TEST POINT DIAGRAM 10-6-1. Power board PEAD-RP35EA( ), PEAD-RP50EA, PEAD-RP60EA, PEAD-RP71EA, PEAD-RP100EA( ), PEAD-RP125EA, PEAD-RP140EA CN2S Connect to the indoor controller board (CN2D) Between 1 1 to 3 3 12.6-13.7V DC (Pin1 1 (+)) CNSK Connect to the indoor controller board...
10-6-2. Indoor controller board PEAD-RP35EA( ), PEAD-RP50EA, PEAD-RP60EA, PEAD-RP71EA, PEAD-RP100EA( ), PEAD-RP125EA, PEAD-RP140EA CN2D LED1 Connector to the indoor LED2 LED3 Power supply Power supply power board (CN2S) Transmission (I.B) (12.5~13.7V DC) (R.B) (Indoor/outdoor) CN3C – Transmission (Indoor/outdoor) CN22 (0~24V DC)
DISASSEMBLY INSTRUCTIONS Figure1. Disconnect the fan motor connecter (and the booster heater connector) Drain pan catches (Hidden) Heat exchanger Bottom plate Filter assembly Drain pan catches (Hidden) Bottom plate Drain pan 1. Removing the fan motor 5. Remove the fan base plate as follow: 1.
Figure3. Fan base Sirocco fan Motor Housing Motor base assembly Bush (Only PEAD-RP71EA) Bush Piece Sirocco fan Piece Housing assembly...
OPTIONAL PARTS 1. REMOTE SENSOR Part No. PAC-SE41TS-E Applied model PEAD-RP35,50,60,71,100,125,140EA , PEAD-RP35,100EA 2. REMOTE OPERATION ADAPTER Part No. PAC-SF40RM-E Applied model PEAD-RP35,50,60,71,100,125,140EA , PEAD-RP35,100EA 3. REMOTE ON/OFF ADAPTER Part No. PAC-SE55RA-E Applied model PEAD-RP35,50,60,71,100,125,140EA , PEAD-RP35,100EA 4. OPTIONAL MOTOR The external static pressure of 130Pa allows long ducts to be used more extensively to enable the most convenient posi- tioning of indoor units.
Issued in Nov. 2005 HWE05210 New publication, effective Nov. 2005 Printed in Japan Specifications subject to change without notice.