Panasonic CU-8ME1XPK - Remote Controller Self-Diagnosis Function; (Display of Malfunction Code)

Troubleshooting by Remote Controller PACD011001C2
496 Troubleshooting UM Combination “MA1R Series” Using R-407C
2.6 Remote Controller Self-Diagnosis Function (Display of Malfunction Code)
The remote controller switches are equipped with a self diagnosis function so that more appropriate
maintenance can be carried out. If a malfunction occurs during operation, the operation lamp, malfunction
code and display of malfunctioning unit No. let you know the contents and location of the malfunction.
When there is a stop due to malfunction, the contents of the malfunction given below can be diagnosed by
a combination of operation lamp, INSPECTION display of the liquid crystal display and display of
malfunction code. It also lets you know the unit No. during group control.
Malfunction Code List
Malfunction
code
Operation
lamp
Inspection
display
Unit No. Malfunction contents Page
Refered
Indoor Unit A0
999
Error of external protection device 498
A1
999
PC board defect 499
A1
879
PC board defect 499
A3
999
Malfunction of drain level control system (33H) 500
A6
999
Fan motor (M1F) lock, Overload 501
A7
879
Malfunction of swing flap motor (M1S) 502
A9
999
Malfunction of moving part of electronic expansion valve
(Y1E)
503
AF
879
Drain level above limit 504
AH
999
Malfunction of air filter maintenance —
AJ
999
Malfunction of capacity determination device 505
C4
999
Malfunction of thermistor (R2T) for liquid pipe (loose
connection, disconnection, short circuit, failure)
506
C5
999
Malfunction of thermistor (R3T) for gas pipes (loose
connection, disconnection, short circuit, failure)
507
C9
999
Malfunction of thermistor (R1T) for air inlet (loose
connection, disconnection, short circuit, failure)
508
CJ
888
Malfunction of thermostat sensor in remote controller 509
Outdoor
Unit
E0
999
Actuation of safety device 510
E1
999
PC board defect 511
E1
879
PC board defect 511
E3
999
Actuation of high pressure switch 512
E4
999
Actuation of low pressure switch 513
E9
999
Malfunction of moving part of electronic expansion valve
(Y1E)
514
F3
999
Abnormal discharge pipe temperature 515
H3
879
High pressure switch failure —
H4
999
Actuation of low pressure switch —
H9
999
Malfunction of thermistor (R1T) for outdoor air (loose
connection, disconnection, short circuit, failure)
516
H9
879
Malfunction of thermistor (R1T) for outdoor air (loose
connection, disconnection, short circuit, failure)
516
J1
999
Malfunction of pressure sensor —
J3
999
Malfunction of discharge pipe thermistor (R3T) (loose
connection, disconnection, short circuit, failure)
517
J3
879
Malfunction of discharge pipe thermistor (R3T) (loose
connection, disconnection, short circuit, failure)
517
J5
999
Malfunction of thermistor (R4T) for suction pipe (loose
connection, disconnection, short circuit, failure)
518