Trouble Diagnosis - Panasonic U-36LE1U6 Service Manual

1. Contents of Remote Controller Switch Alarm Display
Outdoor unit
Thermistor
fault
Ceiling panel connection failure
Protective Indoor unit
device
Outdoor unit
Failure of nonvolatile memory IC (EEPROM) on indoor unit control PCB
Failure of nonvolatile memory IC (EEPROM) on outdoor unit control PCB
Protective No current detected when
device compressor was ON.
Possible cause of malfunction
Outdoor air temp. sensor (T0)
Heat exchanger 1 liquid temp. sensor (C1)
Compressor intake temp. sensor (suction temp)
High-pressure sensor
Thermal protector in indoor unit fan motor is activated.
Float switch is activated.
O sensor activated
2
Compressor 1 (INV) discharge temp. trouble
High-pressure switch is activated.
Reverse phase (missing phase) detected.
DCCT, ACCT overcurrent (compressor less than 80 Hz)
Outdoor unit fan trouble
DCCT, ACCT overcurrent (80 Hz or more)
Start failure caused by compressor wire missing phase,
DCCT failure, or similar problem (INV compressor start
failure).
Compressor 1 (INV)
3 - 3

Trouble Diagnosis

ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
F08
Operating and timer
F07 lamps blinking
alternately
F12
F16
<<P09>>
Timer and heat
ready lamp blinking
<<P01>>
alternately
<<P10>>
P14
P03
P04
Operating and heat
P05
ready lamp blinking
P16 alternately
P22
P26
P29
Operating and timer
lamp blinking
F29
simultaneously
Operating and timer
lamp blinking
F31
simultaneously
Timer lamp blinking
H03
3