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26
14. Troubleshooting Guide
14.1 Self Diagnosis Function
The display screen of wireless remote control unit and the self-diagnosis LEDs (green) on the outdoor printed
circuit board in the outdoor unit can be used to identify the location of the problem.
Refer to the table below to identify and solve the cause of the problem, and then re-start the air conditioner
system.
If the problem is solved and operation returns to normal.
LED 1 illuminates and others LED are off.
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
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
H12
Indoor unit
capacity
unmatched
90s after
power supply
Total indoor
capability more
than maximum
limit or less than
minimum limit, or
number of
indoor unit less
than two
Indoor/outdoor
connection wire
Indoor/outdoor
PCB
Specification and
combination table
in catalogue
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
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
H32
Outdoor heat
exchanger
temperature
sensor 2
abnormality
Continuous
for 5s
Outdoor heat
exchanger
temperature
sensor 2 open or
short circuit
Outdoor heat
exchanger
temperature
sensor 2 lead wire
and connector
H33
Indoor/outdoor
misconnection
abnormality
Indoor and
outdoor rated
voltage different
Indoor and
outdoor units
check
H36
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
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
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