A SERVICE OF

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27
Diagnosis
display
Abnormality
or
Protection
control
LED
6
LED
5
LED
4
LED
3
LED
2
LED
1
Abnormality
Judgment
Protection
Operation
Problem Check location
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
LED 1 illuminate is indicated that outdoor unit is operating normally. If the LED 1 is switched off or flashing, check the power
supply and self-diagnosis indication.
---------- Illuminate
---------- Flashing
Blank
---------- OFF