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21
TROUBLESHOOTING AND SELF DIAGNOSIS
ElectriQ air conditioners have an advanced self-diagnosis system allowing them to display the
service information
Protection and Fault Codes for Indoor Unit Board
Fault/Protection
Fault cause
Indoor
Display
Zero passage fault of PG motor
Abnormal zero passage of PG motor
F0
Indoor and outdoor communication
fault
Abnormal communication between indoor
unit and outdoor unit
F1
Tr sensor fault
Open circuit or short circuit of Tr sensor
F2
Tp sensor fault
Open circuit or short circuit of Tp sensor
F3
Indoor fan fault
Malfunction of indoor fan
F4
PM 2.5 sensor fault(the function is
not available for multi-split air
conditioning system)
Open circuit or short circuit of PM 2.5
sensor(the function is not available for
multi-split air conditioning system)
E9
Outdoor module fault
Malfunction of outdoor module
F5
Outdoor ambient temperature
sensor fault
Open circuit or short circuit of outdoor
temp sensor
F6
Outdoor coil temperature sensor
fault
Open circuit or short circuit of outdoor coil
temp sensor
F7
Compressor suction temperature
sensor fault
Open circuit or short circuit of compressor
suction temp sensor
F8
Compressor exhaust temperature
sensor fault
Open circuit or short circuit of compressor
extraction temp sensor
F9
Current and Potential transformer
fault
Malfunction of current and potential
transformer
FA
Compressor drive fault
Malfunction of compressor drive
FC
Power phase sequence fault or
open phase fault
Power phase sequence fault or open
phase fault
FD
Air return sensor fault
Open circuit or short circuit of air return
sensor
FE
Outdoor DC fan fault
Malfunction of outdoor DC fan
FH
Multi-split mode conflict protection
Multi-split mode conflict protection
Fb
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