57
15.2.1.5 Error Code Table
Diagnosis
Display
Abnormality / Protection control
Abnormality
Judgment
Emergency
operation
Primary location to verify Note
H11
Indoor/Outdoor abnormal
communication
> 1 min after starting
operation
Indoor fan
operation only
(single type only)
• Internal/external cable connections
• Indoor/outdoor PCB
H12 Indoor unit capacity unmatched - -
• Indoor unit total capacity
Multi only
H14 Intake air temperature unmatched - -
• Intake air temperature sensor
(defective or disconnected)
H16 Outdoor Current Transformer - -
• Decreased amount of refrigerant
• Outdoor PCB
H19 Indoor fan motor mechanism lock - -
• Fan motor
• Indoor PCB
H23
Indoor heat exchanger temperature
sensor
Continue for 5 sec -
• Heat exchanger temperature sensor
(defective or disconnected)
H27 Outdoor air temperature sensor Continue for 5 sec
○
(Single type only)
• Outdoor air temperature sensor
(defective or disconnected)
H28
Outdoor heat exchanger temperature
sensor 1
Continue for 5 sec
○
(Single type only)
• Outdoor heat exchanger temperature
sensor (defective or disconnected)
H30
Outdoor discharge pipe temperature
sensor
Continue for 5 sec -
• Outdoor discharge pipe temperature
sensor (defective or disconnected)
H32
Outdoor heat exchanger temperature
sensor 2 (discharge pipe temp)
Continue for 5 sec -
• Outdoor heat exchanger temperature
sensor (defective or disconnected)
Multi only
H34
Outdoor heatsink temperature sensor
at Control Board
Continue for 2 sec -
• Outdoor heatsink temperature sensor
at control board (defective or
disconnected)
Multi only
H36 Outdoor gas pipe temperature sensor Continue for 2 sec -
• Outdoor gas pipe temperature sensor
(defective or disconnected)
Multi only
H37
Outdoor liquid pipe temperature
sensor
Continue for 2 sec -
• Outdoor liquid pipe temperature
sensor (defective or disconnected)
Multi only
H39
Abnormal indoor operating unit or
standby units
- -
• Piping connection error
• Indoor/outdoor connection cable
connection error
Multi only
H41 Abnormal wiring or piping connection - -
• Wiring or piping connection
CU-
2E15GBE
H97 Outdoor fan motor mechanism lock - -
• Outdoor Fan Motor
H98 Indoor high pressure protection - -
• Air filter dirty
• Air circulation short circuit
H99
Indoor heat exchanger freeze
prevention
- -
• Insufficient refrigerant
• Air filter dirty
F11
Cooling/heating cycle changeover
abnormality
4 times occurrences
within 30 minutes
-
• 4-way valve
• V-coil
F17 Indoor standby unit freezing - -
• Outdoor expansion valve leakage
• Indoor unit pipe temperature sensor
F90 PFC circuit protection - -
• Outdoor PCB
• Outdoor fan motor
F91 Refrigerant cycle abnormality
2 times occurrences
within 20 minutes
-
• No refrigerant (3-way valve is closed)
F93
Outdoor compressor abnormal
revolution
4 times occurrences
within 20 minutes
-
• Compressor
F95 Cooling high pressure protection
4 times occurrences
within 20 minutes
-
• Outdoor refrigerant cycle
F96
IPM (power transistor) overheating
protection
- -
• Express refrigerant
• Improper heat radiation
• Outdoor PCB
F97
Outdoor compressor overheating
protection
4 times occurrences
within 10 minutes
-
• Insufficient refrigerant
• Compressor
F98 Total running current protection
3 times occurrences
within 20 minutes
-
• Excess refrigerant
• Improper heat radiation
F99
Outdoor Direct Current (DC) peak
detection
7 times occurrences -
• Outdoor PCB
• Compressor
Note:
“○” – Frequency measured and fan speed fixed.
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