Panasonic U-4LE1E5 Service Manual page 91

1. Contents of Remote Controller Switch Alarm Display
1. Contents of Remote Controller Switch Alarm Display
Activation of
Protective device in outdoor
protective
unit is activated.
device
Indoor thermistor is either
Thermistor
open or damaged.
fault
Outdoor thermistor is either
open or damaged.
EEPROM on indoor unit PCB failure
Protective Protective device for
device for compressor is activated.
compressor is
activated
Possible cause of malfunction
Incorrect discharge temperature (Comp.)
High-pressure switch
Power supply circuit failure, missing-phase detection
There is a trouble with the outdoor unit when the liquid valve
and the gas valve are closed.
Outdoor unit fan motor is unusual.
Compressor running failure resulting from missing phase in the
compressor wiring, etc. (Start failure not caused by IPM or no gas.)
Missing-phase/reverse-phase in the compressor wiring,
Compressor start-up failure (Overcurrent at time of INV
compressor starts up, etc.)
IPM trip (IPM current or temperature)
Indoor coil temp. sensor (E1)
Indoor coil temp. sensor (E3)
Indoor suction air (room) temp. sensor (TA)
Indoor discharge air temp. sensor (BL)
Comp. discharge gas temp. sensor (TD)
Outdoor coil liquid temp. sensor (C1)
Outdoor air temp. sensor (TO)
Compressor intake port temperature sensor (TS)
High pressure sensor
EEPROM on the outdoor unit PCB has failed.
Overcurrent of power supply current (CT) sensor
PAM failure
Power supply current (CT) sensor failure
(Current is not detected at time of compressor ON.)
5 - 3
Mini VRF SYSTEM
Mini VRF SYSTEM
Trouble Diagnosis
Trouble Diagnosis
ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
P03
P04
P05
Operating and
P13 heating ready
lamp blinking
P22
altemately
P16
P29
Timer lamp blinking
H31
<<F01>>
Operating and
timer lamps
<<F03>>
blinking alternately
<<F10>>
<<F11>>
F04
Operating and
timer lamps
F07
blinking alternately
F08
F12
F16
Operating and
timer lamp blinking
F29
simultaneously
Operating and
timer lamp blinking
F31
simultaneously
H01
Timer lamp blinking
H02
H03
5