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15.3. Error Codes Table
Abnormality /
Protection control
Abnormality
Judgement
Protection
operation Problem Check location
Diagnosis
display
H00 No memory of failure — Normal operation — —
H11 Indoor/outdoor
abnormal
communication
After operation for
1 minute
Indoor fan only
operation can
start by entering
into force cooling
operation
Indoor/outdoor
communication not establish
• Indoor/outdoor wire terminal
• Indoor/outdoor PCB
• Indoor/outdoor connection wire
H14 Indoor intake air
temperature sensor
abnormality
Continuous for 5s — Indoor intake air temperature
sensor open or short circuit
• Indoor intake air temperature
sensor lead wire and connector
H15 Compressor
temperature sensor
abnormality
Continuous for 5s — Compressor temperature
sensor open or short circuit
• Compressor temperature sensor
lead wire and connector
H16 Outdoor current
transformer (CT)
abnormality
— — Current transformer faulty or
compressor faulty
• Outdoor PCB faulty or
compressor faulty
H19 Indoor fan motor
merchanism lock
Continuous
happen for 7 times
— Indoor fan motor lock or
feedback abnormal
• Fan motor lead wire and
connector
• Fan motor lock or block
H23 Indoor heat exchanger
temperature sensor
abnormality
Continuous for 5s — Indoor heat exchanger
temperature sensor open or
short circuit
• Indoor heat exchanger
temperature sensor lead wire and
connector
H27 Outdoor air temperature
sensor abnormality
Continuous for 5s — Outdoor air temperature
sensor open or short circuit
• Outdoor air temperature sensor
lead wire and connector
H28 Outdoor heat exchanger
temperature sensor 1
abnormality
Continuous for 5s — Outdoor heat exchanger
temperature sensor 1 open
or short circuit
• Outdoor heat exchanger
temperature sensor 1 lead wire
and connector
H30 Outdoor discharge pipe
temperature sensor
abnormality
Continuous for 5s — Outdoor discharge pipe
temperature sensor open or
short circuit
• Outdoor discharge pipe
temperature sensor lead wire and
connector
H33 Indoor / outdoor
misconnection
abnormality
— — Indoor and outdoor rated
voltage different
• Indoor and outdoor units check
H38 Indoor/Outdoor
mismatch (brand code)
— — Brand code not match • Check indoor unit and outdoor
unit.
H97 Outdoor fan motor
mechanism lock
2 times happen
within 30 minutes
— Outdoor fan motor lock or
feedback abnormal
• Outdoor fan motor lead wire and
connector
• Fan motor lock or block
H98 Indoor high pressure
protection
— — Indoor high pressure
protection (Heating)
• Check indoor heat exchanger
• Air filter dirty
• Air circulation short circuit
H99 Indoor operating unit
freeze protection
— — Indoor freeze protection
(Cooling)
• Check indoor heat exchanger
• Air filter dirty
• Air circulation short circuit
F11 4-way valve switching
abnormality
4 times happen
within 30 minutes
— 4-way valve switching
abnormal
•4-way valve
• Lead wire and connector.
F90 Power factor correction
(PFC) circuit protection
4 times happen
within 10 minutes
— Power factor correction
circuit abnormal
• Outdoor PCB faulty
F91 Refrigeration cycle
abnormality
2 times happen
within 20 minutes
— Refrigeration cycle abnormal • Insufficient refrigerant or valve
close
F93 Compressor abnormal
revolution
4 times happen
within 20 minutes
— Compressor abnormal
revolution
• Power transistor module faulty or
compressor lock
F95 Outdoor cooling high
pressure protection
4 times happen
within 20 minutes
— Cooling high pressure
protection
• Check refrigeration system
• Outdoor air circuit
F96 Power transistor module
overheating protection
4 times happen
within 30 minutes
— Power transistor module
overheat
• PCB faulty
• Outdoor air circuit (fan motor)