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15.4  Error Codes Table 
Diagnosis 
display 
Abnormality / 
Protection control 
Abnormality 
Judgment 
Protection 
Operation 
Problem Check location 
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 
H24 
Indoor heat 
exchanger 
temperature sensor 
2 abnormality 
Continuous for 5s  — 
Indoor heat exchanger 
temperature sensor 2 open 
or short circuit 
  Indoor heat exchanger 
temperature sensor 2 lead wire 
and connector 
H25 
Indoor ion device 
abnormality 
Port is ON for 10s 
during ion device off 
— — 
  ion device 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 
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