59
Diagnosis
display
Abnormality or
protection control
Abnormality judgment Protection operation
Problem
Check location
F17
Indoor standby units
freezing abnormality
3 times happen within
40 minutes
-
Wrong wiring and
connecting pipe,
expansion valve
leakage
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
20 minutes
-
Power factor
correction circuit
abnormal
Outdoor PCB faulty
F91
Refrigerant cycle
abnormality
4 times happen within
60 minutes
-
Refrigeration cycle
abnormal
Insufficient refrigerant or
valve close
F93
Compressor abnormal
revolution
4 times happen within
20 minutes
-
Compressor abnormal
evolution
Power transistor module
faulty or compressor lock
F94
Compressor discharge
pressure overshoot
protection
4 times happen within
20 minutes
-
Compressor discharge
pressure overshoot
Check refrigeration system
F95
Outdoor cooling high
pressure protection
4 occurrences 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
Содержание CU-2E18SBE
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