Panasonic CS-XE9SKUA Service Manual page 54

Diagnosis Abnormality /
display Protection control
Indoor high pressure
H98
protection
Indoor operating unit
H99
freeze protection
4-way valve
F11 switching
abnormality
Indoor standby units
F17
freezing abnormality
Power factor
correction
F90
(PFC) circuit
protection
Refrigeration cycle
F91
abnormality
Compressor
F93
abnormal revolution
Compressor
F94 discharge overshoot
protection
Outdoor cooling high
F95
pressure protection
Power transistor
F96 module overheating
protection
Compressor
F97 overheating
protection
Total running current
F98
protection
Outdoor direct
F99 current (DC) peak
detection
Abnormality Protection
Judgment Operation
—
—
4 times happen
within 30 minutes
3 times happen
within 40 minutes
4 times happen
within 10 minutes
2 times happen
within 20 minutes
4 times happen
within 20 minutes
4 times happen
within 30 minutes
4 times happen
within 20 minutes
4 times happen
within 30 minutes
3 times happen
within 30 minutes
3 times happen
within 20 minutes
Continuous
happen for 7 times
Problem
Indoor high pressure
—
protection (Heating)
Indoor freeze protection
—
(Cooling)
4-way valve switching
—
abnormal
Wrong wiring and
connecting pipe, expansion
— valve leakage, indoor heat
exchanger sensor open
circuit
Power factor correction
—
circuit abnormal
Refrigeration cycle
—
abnormal
Compressor abnormal
—
revolution
Compressor discharge
—
pressure overshoot
Cooling high pressure
—
protection
Power transistor module
—
overheat
— Compressor overheat
— Total current protection
Power transistor module
—
current protection
54
Check location
 Check indoor heat exchanger
 Air filter dirty
 Air circulation short circuit
 Check indoor heat exchanger
 Air filter dirty
 Air circulation short circuit
 4-way valve
 Lead wire and connector
 Check indoor/outdoor
connection wire and pipe
 Indoor heat exchanger sensor
lead wire and connector
 Expansion valve lead wire and
connector
 Outdoor PCB faulty
 Insufficient refrigerant or valve
close
 Power transistor module faulty
or compressor lock
 Check refrigeration system
 Check refrigeration system
 Outdoor air circuit
 PCB faulty
 Outdoor air circuit (fan motor)
 Insufficient refrigerant
 Check refrigeration system
 Power source or compressor
lock
 Power transistor module faulty
or compressor lock