Panasonic CS-E7LKEW Service Manual page 93

Diagnosis Abnormality /
display Protection control
H39 Abnormal indoor
operating unit or
standby units
H41 Abnormal wiring or
piping connection
H58 Indoor gas sensor
abnormality
H59 ECO patrol sensor
abnormality
H64 Outdoor high pressure
sensor abnormality
H97 Outdoor fan motor
mechanism lock
H98 Indoor high pressure
protection
H99 Indoor operating unit
freeze protection
F11 4-way valve switching
abnormality
F17 Indoor standby units
freezing abnormality
F90 Power factor correction
(PFC) circuit protection
F91 Refrigeration cycle
abnormality
F93 Compressor abnormal
revolution
F94 Compressor discharge
pressure overshoot
protection
F95 Outdoor cooling high
pressure protection
F96 Power transistor module
overheating protection
F97 Compressor
overheating protection
F98 Total running current
protection
F99 Outdoor direct current
(DC) peak detection
Abnormality Protection
Judgement operation
3 times happen —
within 40 minutes
— —
Continuous for 6 —
hours
Continuous for —
70s
Continuous for 1 —
minutes
2 times happen —
within 30 minutes
— —
— —
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
Wrong wiring and connecting
pipe, expansion valve
abnormality, indoor heat
exchanger sensor open
circuit
Wrong wiring and connecting
pipe, expansion valve
abnormality
Indoor gas sensor open or
short circuit
ECO patrol sensor open or
short circuit
High pressure sensor open
circuit during compressor
stop
Outdoor fan motor lock or
feedback abnormal
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
93
Check location
• Check indoor/outdoor connection
wire and connection pipe
• Indoor heat exchanger sensor
lead wire and connector
• Expansion valve and lead wire
and connector
• Check indoor/outdoor connection
wire and connection pipe
• Expansion valve and lead wire
and connector.
• Indoor gas sensor
• Indoor PCB
• ECO patrol sensor
• ECO patrol and Indoor PCB
• High pressure sensor
• Lead wire and connector
• Outdoor fan motor lead wire and
connector
• Fan motor lock or block
• 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