93
H39 Abnormal indoor
operating unit or
standby units
3 times happen
within 40 minutes
— Wrong wiring and connecting
pipe, expansion valve
abnormality, indoor heat
exchanger sensor open
circuit
• Check indoor/outdoor connection
wire and connection pipe
• Indoor heat exchanger sensor
lead wire and connector
• Expansion valve and lead wire
and connector
H41 Abnormal wiring or
piping connection
— — Wrong wiring and connecting
pipe, expansion valve
abnormality
• Check indoor/outdoor connection
wire and connection pipe
• Expansion valve and lead wire
and connector.
H58 Indoor gas sensor
abnormality
Continuous for 6
hours
— Indoor gas sensor open or
short circuit
• Indoor gas sensor
• Indoor PCB
H59 ECO patrol sensor
abnormality
Continuous for
70s
— ECO patrol sensor open or
short circuit
• ECO patrol sensor
• ECO patrol and Indoor PCB
H64 Outdoor high pressure
sensor abnormality
Continuous for 1
minutes
— High pressure sensor open
circuit during compressor
stop
• High pressure sensor
• Lead wire and connector
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.
F17 Indoor standby units
freezing abnormality
3 times happen
within 40 minutes
— Wrong wiring and connecting
pipe, expansion valve
leakage, indoor heat
exchanger sensor open
circuit
• Check indoor/outdoor connection
wire and pipe
• Indoor heat exchanger sensor
lead wire and connector
• Expansion 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
F94 Compressor discharge
pressure overshoot
protection
4 times happen
within 30 minutes
— Compressor discharge
pressure overshoot
• Check refrigeration system
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)
F97 Compressor
overheating protection
3 times happen
within 30 minutes
— Compressor overheat • Insufficient refrigerant
F98 Total running current
protection
3 times happen
within 20 minutes
— Total current protection • Check refrigeration system
• Power source or compressor lock
F99 Outdoor direct current
(DC) peak detection
Continuous
happen for 7 times
— Power transistor module
current protection
• Power transistor module faulty or
compressor lock
Abnormality /
Protection control
Abnormality
Judgement
Protection
operation
Problem Check location
Diagnosis
display
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