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77
Note:
“○” – Frequency measured and fan speed fixed
The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until “beep”
sound heard following by pressing the CHECK button at remote control.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors
(refer to Error Code Table) by using remote control or Auto OFF/ON button at indoor unit. However, the remote
control signal receiving sound is changed from one “beep” to four “beep” sounds.
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
F94 Compressor discharge
overshoot protection
4 times happen
within 30 minutes
— Compressor discharge
pressure overshoot
• Check refrigeration system
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
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
H99 Indoor operating unit
freeze protection
— — Indoor freeze protection
(Cooling)
• Check indoor heat exchanger
• Air filter dirty
• Air circulation short circuit
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.
H98 Indoor high pressure
protection
— — Indoor high pressure
protection (Heating)
• Check indoor heat exchanger
• Air filter dirty
• Air circulation short circuit
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
H64 Outdoor high pressure
sensor abnormality
Continuous for 1
minutes
— High pressure sensor open
circuit during compressor
• High pressure sensor
• Lead wire and connector
H59 ECONAVI sensor
abnormality
Continuous for
25s
— ECOANVI sensor open or
short circuit
• ECONAVI sensor (defective or
disconnected)
• ECONAVI PCB
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