Panasonic U-8ME1E81 Service Manual page 53

1. Contents of Remote Controller
1. Contents of Remote Controller Switch Alarm Display
Switch Alarm Display
Thermistor fault Outdoor thermistor is either
open or damaged.
Protective device in indoor
unit is activated.
Activation of
protective
device
Protective device in outdoor
unit is activated.
Indoor unit communication
error of group control wiring.
EEPROM on indoor unit PCB failure
EEPROM on the main or sub outdoor unit PCB has failed.
Protective Protective device for
device compressor No. 1 is activated.
for compressor
is activated
Protective device for
compressor No. 2 is activated. Compressor No. 2 current trouble (locked)
Protective device for
compressor No. 3 is activated. Compressor No. 3 current trouble (locked)
Oil sensor fault.
(Disconnection, etc.)
Abnormal device function
<< >> 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 intake temp. sensor (SCT)
Temp. sensor at refrigerant gas outlet of dual-tube (SCG)
High pressure sensor failure. High pressure trouble.
Low-pressure sensor failure
Outdoor No. 2 coil gas temp. sensor (EXG2)
Outdoor No. 2 coil liquid temp. sensor (EXL2)
Thermal protector in indoor unit fan motor is activated.
Improper wiring connections of ceiling panel.
Float switch is activated.
Faulty drain pump. Drain pump locked.
Operation of protective function of fan inverter.
O sensor (detects low oxygen level) activated
2
Compressor thermal protector is activated. Power supply
voltage is unusual. (The voltage is more than 260 V or less
than 160 V between L and N phase.)
Incorrect discharge temperature. (Comp. No. 1)
High pressure switch is activated.
Negative (defective) phase.
DCCT overcurrent
Incorrect discharge temperature. (Comp. No. 2)
Compressor 3 (constant speed) discharge temp. trouble
High load alarm
Outdoor unit fan motor is unusual.
Inverter for compressor is unusual.
(DC compressor does not operate.)
When alarm message in other indoor units occurs in case of
group control, unalarmed state of indoor units are inoperative.
Compressor No. 1 current trouble (overcurrent)
Current is not detected when comp. No. 1 is ON.
Compressor No. 1 discharge temp. sensor disconnected
Compressor No. 2 current trouble (overcurrent)
Compressor No. 2 CT sensor disconnected or short circuit
Compressor No. 2 discharge temp. sensor disconnected
Compressor No. 3 current trouble (overcurrent)
Compressor No. 3 CT sensor disconnected or short circuit
Compressor No. 3 discharge temp. sensor disconnected
Low pressure switch is activated.
Comp. No. 1 oil sensor
Comp. No. 2 oil sensor
Comp. No. 3 oil sensor
IPM trip (IPM current or temperature)
3-3
2WAY SYSTEM
Trouble Diagnosis
2WAY SYSTEM
Trouble Diagnosis
ON: Blinking: OFF:
Wired
Wireless
remote
remote controller
control
receiver display
display
F12
Operating and timer
F14
lamps blinking
F16
alternately
F17
F23
F24
<<P01>>
Timer and heat
ready lamp blinking
<<P09>>
alternately
<<P10>>
<<P11>>
<<P12>>
P14
P02
P03
Operating and heat
P04
ready lamp blinking
alternately
P05
P16
P17
P18
P20
P22
P29
<P31>
Operating and timer
lamp blinking
F29
simultaneously
Operating and timer
lamp blinking
F31
simultaneously
H01
H03
H05
H11
H12
H13
Timer lamp blinking
H15
H21
H22
H23
H25
H06
H08
H27
H28
H31
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