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W-2WAY ECO-i SYSTEM
Trouble Diagnosis
1. Contents of Remote Controller Switch Alarm Display
ON: Blinking: OFF:
Possible cause of malfunction
Wired
remote
control
display
Wireless
remote controller
receiver display
Operation
Timer
Standby
for heating
Thermistor fault Outdoor unit
Compressor intake temp. sensor (suction temp)
F12
High-pressure sensor
F16
Low-pressure sensor
F17
Heat exchanger 2 liquid temp. sensor
F24
Heat exchanger 2 gas temp. sensor
F23
Ceiling panel connection failure <<P09>>
Protective
device
Indoor unit
Thermal protector in indoor unit fan motor is activated. <<P01>>
Float switch is activated. <<P10>>
Fan inverter protection function activated. <<P12>>
Outdoor unit
Oxygen (O
2
) gas sensor activated. P14
Compressor 1 (INV) discharge temp. trouble P03
High-pressure switch or Overload Protector (OLR) P04
Reverse phase (missing phase) detected. P05
DCCT, ACCT overcurrent (compressor less than 80 Hz) P16
Compressor 2 (constant speed) discharge temp. trouble P17
Outdoor unit fan trouble P22
DCCT, ACCT over current (80 Hz or more) P26
INV compressor start failure. (Missing phase or lock alarm)
P29
Failure of nonvolatile memory IC (EEPROM) on indoor unit control PCB
F29
Failure of nonvolatile memory IC (EEPROM) on outdoor unit control PCB
F31
Protective
device
Overload current detected.
Compressor 2 (constant speed) H11
Lock current detected.
Compressor 2 (constant speed) H12
No current detected when
compressor was ON.
Compressor 1 (INV) H03
Compressor 2 (constant speed) H13
Discharge temp. sensor trouble Compressor 2 (constant speed) H15
Outdoor unit protection Low-pressure trouble H06
Outdoor unit protection HIC trouble alarm H31
Low oil alarm H07
Connection failure of oil detection sensor
Compressor 1 (INV) H08
Compressor 2 (constant speed) H27
Fusing of electromagnetic contact (Current detected when compressor was OFF)
CHECK
only blinking
(No display changes)
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.
Timer lamp blinking
Operating and timer
lamps blinking
altemately
Timer and heat
ready lamp blinking
altemately
Operating and heat
ready lamp blinking
altemately
Operating and timer
lamp blinking
simultaneously
Operating and timer
lamp blinking
simultaneously