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IV-3
SM831148
4. Service procedures
1
2
3
4
5
6
P09
P01
P10
P03
P04
P05
P15
P19
P20
P22
P26
P29
P31
H01
F01
F02
F10
F04
F06
F07
F08
F12
F29
Ceiling panel connection failure
Indoor protection
Fan protective thermostat
Float switch
Discharge temperature trouble
High pressure switch or compressor motor thermal protector is activated.
Open phase detected, AC power trouble
No gas
4-way valve locked
High cooling load
Outdoor fan trouble
Inverter compressor trouble (HIC PCB)
Inverter compressor trouble (MDC)
Simultaneous-operation multi control trouble
Compressor current failure (overload)
Indoor heat exchanger temperature sensor (E1)
Indoor heat exchanger temperature sensor (E2)
Indoor temperature sensor
Discharge temperature (TD)
Outdoor heat exchanger temperature (C1)
Outdoor heat exchanger temperature (C2)
Outdoor air temperature (TO)
Intake temperature (TS)
Indoor EEPROM error
Outdoor protection
Thermistor open circuit
• Short circuit (indoor)
Thermistor open circuit
• Short circuit (outdoor)
Activation of
protective
device
Thermistor
fault
Outdoor EEPROM error
F31
Alternately
Alter.
Alter.
Simul.
Simul.
Alternately
Wired
remote
control
display
Wireless
remote controller
receiver display
Operation
Timer
Standby
Possible cause of malfunction