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Error Codes Table
Diagnosis
display
Abnormality / Protection control Abnormality
Judgement
Emergency
operation
Primary location to verify
H11 Indoor / outdoor abnormal
communication
> 1 min after starting
operation
Indoor fan operation
only
• Internal / external cable connections
• Indoor / Outdoor PCB
H12 Connection capability rank abnormal — — —
H14 Indoor intake air temperature sensor
abnormality
Continue for 5 sec. —
• Intake air temperature sensor
(detective or disconnected)
H15 Outdoor compressor temperature sensor
abnormality
Continue for 5 sec. —
• Compressor temperature sensor
(detective or disconnected)
H16 Outdoor Current Transformer open
circuit
— —
• Outdoor PCB
• IPM (Power transistor) module
H19 Indoor fan motor merchanism lock — —
• Indoor PCB
• Fan motor
H23 Indoor heat exchanger temperature
sensor abnormality
Continue for 5 sec. O
(Cooling only)
• Heat exchanger temperature sensor
(defective or disconnected)
H26 Ionizer breakdown — —
• Ionizer
H27 Outdoor air temperature sensor
abnormality
Continue for 5 sec. O
• Outdoor temperature sensor
(defective or disconnected)
H28 Outdoor heat exchanger temperature
sensor abnormality
Continue for 5 sec. O
• Outdoor heat exchanger
temperature sensor (defective or
disconnected)
H33 Indoor/Outdoor wrong connection — —
• Indoor/Outdoor supply voltage
H38 Indoor / outdoor mismatch (brand code) — — —
H98 Indoor high pressure protection — —
• Air filter dirty
• Air circulation short circuit
H99 Indoor heat exchanger anti-freezing
protection
— —
• Insufficient refrigerant
• Air filter dirty
F11 Cooling / Heating cycle changeover
abnormality
4 times occurance
within 30 minutes
—
• 4-way valve
• V-coil
F90 PFC control 4 times occurance
within 10 minutes
—
• Voltage at PFC
F91 Refrigeration cycle abnormality 2 times occurance
within 20 minutes
—
• No refrigerant
(3-way valve is closed)
F93 Compressor rotation failure — —
• Compressor
F95 Cool high pressure protection 4 times occurance
within 20 minutes
—
• Outdoor refrigerant circuit
F96 IPM (power transistor) overheating
protection
— —
• Excess refrigerant
• Improper heat radiation
• IPM (Power transistor)
F97 Outdoor compressor overheating
protection
4 times occurance
within 10 minutes
—
• Insufficient refrigerant
• Compressor
F98 Total running current protection 3 times occurance
within 20 minutes
—
• Excess refrigerant
• Improper heat radiation
F99 Outdoor Direct Current (DC) peak
detection
7 times occurance
continuously
—
• Outdoor PCB
• IPM (Power transistor)
• Compressor
Note:
“O” - Frequency measured and fan speed fixed.
The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until “beep” sound heard
following by pressing the “RESET” button at remote controller.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error
Codes Table) by using remote controller or Auto Switch at indoor unit. However, the remote controller signal receiving sound is
changed from one “beep” to four “beep” sounds.
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CS-E9DKEW CU-E9DKE / CS-E12DKEW CU-E12DKE