Panasonic U-8ME1E8E Service Manual page 146

1. Contents of Remote Controller
Switch Alarm Display
Thermistor fault Outdoor unit
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
Overload current detected.
device
Lock current detected.
No current detected when
compressor was ON.
Discharge temp. sensor trouble
Outdoor unit protection
Outdoor unit protection
Low oil alarm
Connection failure of oil detection sensor
Fusing of electromagnetic contact (Current detected when compressor was OFF)
Automatic backup operation
<< >> alarm indication: Does not affect the operation of other indoor units.
< > alarm indication: In some cases may affect the operation of other indoor units.
Possible cause of malfunction
Compressor 1 (INV) discharge temp. sensor
Compressor 2 (constant speed) discharge temp. sensor
Compressor 3 (constant speed) discharge temp. sensor
Outdoor air temp. sensor
Heat exchanger 1 liquid temp. sensor
Heat exchanger 1 gas temp. sensor
Compressor intake temp. sensor (suction temp)
High-pressure sensor
Low-pressure sensor
Heat exchanger 2 liquid temp. sensor
Heat exchanger 2 gas temp. sensor
Thermal protector in indoor unit fan motor is activated.
Float switch is activated.
Fan inverter protection function activated.
Oxygen (O ) gas sensor activated.
2
Compressor thermal protector is activated.
Power supply voltage is unusual.
(More than 260V or less than 160V between L1 and L2 phase.)
Compressor 1 (INV) discharge temp. trouble
High-pressure switch
Reverse phase (missing phase) detected.
DCCT, ACCT overcurrent
Compressor 2 (constant speed) discharge temp. trouble
Compressor 3 (constant speed) discharge temp. trouble
High load alarm
Outdoor unit fan trouble
INV compressor start failure. (Missing phase or lock alarm)
Compressor 2 (constant speed)
Compressor 3 (constant speed)
Compressor 2 (constant speed)
Compressor 3 (constant speed)
Compressor 1 (INV)
Compressor 2 (constant speed)
Compressor 3 (constant speed)
Compressor 1 (INV)
Compressor 2 (constant speed)
Compressor 3 (constant speed)
Low-pressure trouble
HIC trouble alarm
Compressor 1 (INV)
Compressor 2 (constant speed)
Compressor 3 (constant speed)
6 - 3
2WAY SYSTEM
Trouble Diagnosis
ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
F04
F05
F22
F08
F07
Operating and timer
lamps blinking
F06
altemately
F12
F16
F17
F24
F23
<<P09>>
Timer and heat
ready lamp blinking
<<P01>>
altemately
<<P10>>
<<P12>>
P14
P02
P03
Operating and heat
ready lamp blinking
P04
altemately
P05
P16
P17
P18
P20
P22
P29
Operating and timer
lamp blinking
F29
simultaneously
Operating and timer
lamp blinking
F31 simultaneously
H11
H21
H12
H22
H03
H13
Timer lamp blinking
H23
H05
H15
H25
H06
H31
H07
H08
H27
H28
CHECK
(No display changes)
only blinking
6