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245
Diagnosis
display
(Indoor
model:
CS-XX /
S-XX /
WH-XX)
Abnormality
or
protection
control
LED
6
LED
5
LED
4
LED
3
LED
2
LED
1
Abnormality
judgement
Protection
operation
Problem
Check location
H36 / F23 /
H51
Outdoor gas pipe
temperature
sensor
abnormality
○
○
Continuous
for 5s
Heating
protection
operation
only
Outdoor gas pipe
temperature
sensor open or
short circuit
Outdoor gas
pipe
temperature
sensor lead wire
and connector
H37 / F24 /
H53
Outdoor liquid
pipe temperature
sensor
abnormality
○
○
○
Continuous
for 5s
Cooling
protection
operation
only
Outdoor liquid
pipe temperature
sensor open or
short circuit
Outdoor liquid
pipe
temperature
sensor lead wire
and connector
H64 / P04 /
F27
Outdoor high
pressure sensor
abnormality
○
○
Continuous
for 1
minute
-
High pressure
sensor open
circuit during
compressor stop
High pressure
sensor
Lead wire and
connector
H89 / F16 /
H64
Compressor
discharge
temperature
sensor
abnormality
○
○
○
4 times
happens
within 20
minutes
-
High pressure
sensor open or
short circuit
High pressure
sensor
Lead wire and
connector
H97 / P22 /
F15
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 / - /
H98
Indoor high
pressure
protection
○
○
○
-
-
Indoor high
pressure
protection
(Heating)
Check indoor
heat exchanger
Air filter dirty
Air circulation
short circuit
H99 / - /
H99
Indoor operating
unit freeze
protection
○
○
○
-
-
Indoor freeze
protection
(Cooling)
Check indoor
heat exchanger
Air filter dirty
Air circulation
short circuit
H64
Outdoor high
pressure switch
abnormality
○
○
-
-
High pressure
switch open circuit
during
compressor stop
High pressure
switch lead wire,
connector
CN-PSW1
H89
High pressure
sensor abnormal
○
○
○
-
-
High pressure
sensor open or
short circuit
High pressure
sensor lead
wire, connector
CN-HPS
F11 / L18 /
F25
4-way valve
switching
abnormality
○
○
○
○
4 times
happen
within 30
minutes
-
4-way valve
switching
abnormal
4-way valve
Lead wire and
connector.
F17 / P14 /
F33
Indoor standby
units freezing
abnormality
○
3 times
happen
within 40
minutes
-
Wrong wiring and
connecting pipe,
expansion valve
leakage.
Check
indoor/outdoor
connection wire
and pipe
Indoor heat
exchanger
sensor lead wire
and connector
Expansion valve
lead wire and
connector.
F90 / H02 /
F41
Power factor
correction (PFC)
circuit protection
○
○
4 times
happen
within 20
minutes
-
Power factor
correction circuit
abnormal
Outdoor PCB
faulty
F91 / P15 /
F24
Refrigeration
cycle abnormality
○
○
4 times
happen
within 60
minutes
-
Refrigeration
cycle abnormal
Insufficient
refrigerant or
valve close