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57

H00

No memory of failure

—

Normal operation

—

—

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

H14

Indoor intake air 
temperature sensor 
abnormality

Continuous for 5s

—

Indoor intake air temperature 
sensor open or short circuit

• Indoor intake air temperature 

sensor lead wire and connector

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

H19

Indoor fan motor 
merchanism lock

Continuous 
happen for 7 times

—

Indoor fan motor lock or 
feedback abnormal

• Fan motor lead wire and 

connector

• Fan motor lock or block

H23

Indoor heat exchanger 
temperature sensor 
abnormality

Continuous for 5s

—

Indoor heat exchanger 
temperature sensor open or 
short circuit

• Indoor heat exchanger 

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

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

H30

Outdoor discharge pipe 
temperature sensor 
abnormality

Continuous for 5s

—

Outdoor discharge pipe 
temperature sensor open or 
short circuit

• Outdoor discharge pipe 

temperature sensor 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

H34

Outdoor heat sink 
temperature sensor 
abnormality

Continuous for 2s

—

Outdoor heat sink 
temperature sensor open or 
short circuit

• Outdoor heat sink sensor

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

H38

Indoor/Outdoor 
mismatch (brand code)

—

—

Brand code not match

• Check indoor unit and outdoor 

unit.

58

H39

Abnormal indoor 
operating unit or 
standby units

3 times happen 
within 40 minutes

—

Wrong wiring and connecting 
pipe, 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

H41

Abnormal wiring or 
piping connection

—

—

Wrong wiring and connecting 
pipe, expansion valve 
abnormality

• Check indoor/outdoor connection 

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

H59

ECO patrol sensor 
abnormality

Continuous for 
70s

—

ECO patrol sensor open or 
short circuit

• ECO patrol sensor
• ECO patrol and Indoor PCB

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

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

59

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.

• 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

units.

• Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.

60

During startup, error code appears when different types of indoor and outdoor units are interconnected.

• Wrong models interconnected.
• Wrong indoor unit or outdoor unit PCBs mounted.
• Indoor unit or outdoor unit PCBs defective.
• Indoor-outdoor unit signal transmission error due to wrong wiring.
• Indoor-outdoor unit signal transmission error due to breaking of wire 3 in the connection wires between the indoor and outdoor

units.