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61
16.4. Error Codes Table
Abnormality or Protection Control
Abnormality
Judgement
Protection
Operation
Problem
Check Location
Diagnosis
Display
H00
No memory of failure
—
Normal operation
—
—
H11
Indoor / outdoor abnormal
communication
communication
After operation for
1 minute
Indoor fan only
operation can start
by entering into
force cooling
operation
• Indoor / outdoor
communication not
establish
establish
• Indoor / outdoor wire
terminal, indoor /
outdoor PCB, indoor /
outdoor connection
wire
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
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
indoor / outdoor PCB,
specification and
combination table in
catalogue
H14
Indoor intake air temperature sensor
abnormality
abnormality
Continuous for 5s
—
• Indoor intake air
temperature sensor
open or short circuit
open or short circuit
• Indoor intake air
temperature sensor
lead wire and
connector
lead wire and
connector
H15
Compressor temperature sensor
abnormality
abnormality
Continuous for 5s
—
• Compressor
temperature sensor
open or short circuit
open or short circuit
• Compressor
temperature sensor
lead wire and
connector
lead wire and
connector
H16
Outdoor current transformer (CT)
abnormality
abnormality
—
—
• Current transformer
faulty or compressor
faulty
faulty
• Outdoor PCB faulty
or compressor faulty
H19
Indoor fan motor merchanism lock
Continuous
happen for 7 times
—
• Indoor fan motor lock
or feedback
abnormal
abnormal
• Fan motor lead wire
and connector, fan
motor lock or block
motor lock or block
H23
Indoor heat exchanger temperature
sensor abnormality
sensor abnormality
Continuous for 5s
—
• Indoor heat
exchanger
temperature sensor
open or short circuit
temperature sensor
open or short circuit
• Indoor heat
exchanger
temperature sensor
lead wire and
connector
temperature sensor
lead wire and
connector
H25
Indoor E-Ion abnormality
Port is ON for 10s
during E-Ion off
—
—
• E-Ion PCB
H27
Outdoor air temperature sensor
abnormality
abnormality
Continuous for 5s
—
• Outdoor air
temperature sensor
open or short circuit
open or short circuit
• Outdoor air
temperature sensor
lead wire and
connector
lead wire and
connector
H28
Outdoor heat exchanger temperature
sensor 1 abnormality
sensor 1 abnormality
Continuous for 5s
—
• Outdoor heat
exchanger
temperature sensor 1
open or short circuit
temperature sensor 1
open or short circuit
• Outdoor heat
exchanger
temperature sensor 1
lead wire and
connector
temperature sensor 1
lead wire and
connector
H30
Outdoor discharge pipe temperature
sensor abnormality
sensor abnormality
Continuous for 5s
—
• Outdoor discharge
pipe temperature
sensor open or short
circuit
sensor open or short
circuit
• Outdoor discharge
pipe temperature
sensor lead wire and
connector
sensor lead wire and
connector
H32
Outdoor heat exchanger temperature
sensor 2 abnormality
sensor 2 abnormality
Continuous for 5s
—
• Outdoor heat
exchanger
temperature sensor 2
open or short circuit
temperature sensor 2
open or short circuit
• Outdoor heat
exchanger
temperature sensor 2
lead wire and
connector
temperature sensor 2
lead wire and
connector
H33
Indoor / outdoor misconnection
abnormality
abnormality
—
—
• Indoor and outdoor
rated voltage
different
different
• Indoor and outdoor
units check
H34
Outdoor heat sink temperature sensor
abnormality
abnormality
Continuous for 2s
—
• Outdoor heat sink
temperature sensor
open or short circuit
open or short circuit
• Outdoor heat sink
sensor
H36
Outdoor gas pipe temperature sensor
abnormality
abnormality
Continuous for 5s Heating protection
operation only
• Outdoor gas pipe
temperature sensor
open or short circuit
open or short circuit
• Outdoor gas pipe
temperature sensor
lead wire and
connector
lead wire and
connector
62
H37
Outdoor liquid pipe temperature sensor
abnormality
abnormality
Continuous for 5s Cooling protection
operation only
• Outdoor liquid pipe
temperature sensor
open or short circuit
open or short circuit
• Outdoor liquid pipe
temperature sensor
lead wire and
connector
lead wire and
connector
H38
Indoor / outdoor mismatch
(brand code)
(brand code)
—
—
• Brand code not
match
• Check indoor unit
and outdoor unit
H39
Abnormal indoor operating unit or
standby units
standby units
3 times happen
within 40 minutes
—
• Wrong wiring and
connecting pipe,
expansion valve
abnormality, indoor
heat exchanger
sensor open circuit
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
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
expansion valve
abnormality
• Check indoor /
outdoor connection
wire and connection
pipe, expansion valve
and lead wire and
connector
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
H64
Outdoor high pressure sensor
abnormality
abnormality
Continuous for 1
minutes
—
• High pressure
sensor open circuit
during compressor
stop
during compressor
stop
• High pressure
sensor, lead wire and
connector
connector
H97
Outdoor fan motor mechanism lock
2 times happen
within 30 minutes
—
• Outdoor fan motor
lock or feedback
abnormal
abnormal
• Outdoor fan motor
lead wire and
connector, fan motor
lock or block
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
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
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
abnormality
3 times happen
within 40 minutes
—
• Wrong wiring and
connecting pipe,
expansion valve
leakage, indoor heat
exchanger sensor
open circuit
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
wire and pipe, indoor
heat exchanger
sensor lead wire and
connector,
expansion valve lead
wire and connector
F90
Power factor correction (PFC) circuit
protection
protection
4 times happen
within 10 minutes
—
• Power factor
correction circuit
abnormal
abnormal
• Outdoor PCB faulty
F91
Refrigeration cycle abnormality
2 times happen
within 20 minutes
—
• Refrigeration cycle
abnormal
• Insufficient
refrigerant or valve
close
close
F93
Compressor abnormal revolution
4 times happen
within 20 minutes
—
• Compressor
abnormal revolution
• Power transistor
module faulty or
compressor lock
compressor lock
F94
Compressor discharge pressure
overshoot protection
overshoot protection
4 times happen
within 30 minutes
—
• Compressor
discharge pressure
overshoot
overshoot
• Check refrigeration
system
F95
Outdoor cooling high pressure
protection
protection
4 times happen
within 20 minutes
—
• Cooling high
pressure protection
• Check refrigeration
system, outdoor air
circuit
circuit
F96
Power transistor module overheating
protection
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
63
F98
Total running current protection
3 times happen
within 20 minutes
—
• Total current
protection
• Check refrigeration
system, power
source or
compressor lock
source or
compressor lock
F99
Outdoor direct current (DC) peak
detection
detection
Continuous
happen for 7 times
—
• Power transistor
module current
protection
protection
• Power transistor
module faulty or
compressor lock
compressor lock
64
16.5. Self-diagnosis Method
16.5.1.
H11 (Indoor/Outdoor Abnormal Communication)
Malfunction Decision Conditions
• During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is
checked whether it is normal.
Malfunction Caused
• Faulty indoor unit PCB.
• Faulty outdoor unit PCB.
• Indoor unit-outdoor unit signal transmission error due to wrong wiring.
• Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor
• Faulty outdoor unit PCB.
• Indoor unit-outdoor unit signal transmission error due to wrong wiring.
• Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor
units.
• Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.
Troubleshooting
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