Remote Controller Self-Diagnosis Function; (Display Of Malfunction Code) - Panasonic Urban Multi MX1R Series Service Manual

Troubleshooting by Remote Controller
2.6

Remote Controller Self-Diagnosis Function

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
Indoor Unit A0
A1
A1
A3
A6
A7
A9
AF
AH
AJ
C4
C5
C9
CJ
Outdoor E0
Unit
E1
E1
E3
E4
E9
F3
H3
H4
H9
H9
J1
J3
J3
J5
496
Operation Inspection Unit No.
lamp display
9 9
9 9
8 7
9 9
9 9
8 7
9 9
8 7
9 9
9 9
9 9
9 9
9 9
8 8
9 9
9 9
8 7
9 9
9 9
9 9
9 9
8 7
9 9
9 9
8 7
9 9
9 9
8 7
9 9

(Display of Malfunction Code)

Malfunction contents
Error of external protection device
9
PC board defect
9
PC board defect
9
Malfunction of drain level control system (33H)
9
Fan motor (M1F) lock, Overload
9
Malfunction of swing flap motor (M1S)
9
Malfunction of moving part of electronic expansion valve
9
(Y1E)
Drain level above limit
9
Malfunction of air filter maintenance
9
Malfunction of capacity determination device
9
Malfunction of thermistor (R2T) for liquid pipe (loose
9
connection, disconnection, short circuit, failure)
Malfunction of thermistor (R3T) for gas pipes (loose
9
connection, disconnection, short circuit, failure)
Malfunction of thermistor (R1T) for air inlet (loose
9
connection, disconnection, short circuit, failure)
Malfunction of thermostat sensor in remote controller
8
Actuation of safety device
9
PC board defect
9
PC board defect
9
Actuation of high pressure switch
9
Actuation of low pressure switch
9
Malfunction of moving part of electronic expansion valve
9
(Y1E)
Abnormal discharge pipe temperature
9
High pressure switch failure
9
Actuation of low pressure switch
9
Malfunction of thermistor (R1T) for outdoor air (loose
9
connection, disconnection, short circuit, failure)
Malfunction of thermistor (R1T) for outdoor air (loose
9
connection, disconnection, short circuit, failure)
Malfunction of pressure sensor
9
Malfunction of discharge pipe thermistor (R3T) (loose
9
connection, disconnection, short circuit, failure)
Malfunction of discharge pipe thermistor (R3T) (loose
9
connection, disconnection, short circuit, failure)
Malfunction of thermistor (R4T) for suction pipe (loose
9
connection, disconnection, short circuit, failure)
Troubleshooting UM Combination "MA1R Series" Using R-407C
PACD011001C2
Page
Refered
498
499
499
500
501
502
503
504
—
505
506
507
508
509
510
511
511
512
513
514
515
—
—
516
516
—
517
517
518