Panasonic CU-3E18LBE - Page 61

61
H64 Outdoor high
pressure
sensor
abnormality
Continuous
for 1 minutes
— High pressure sensor
open circuit during
compressor stop
• High pressure
sensor
• Lead wire and
connector
H97 Outdoor fan
motor
mechanism
lock
2 times
happen within
30 minutes
— Outdoor fan motor
lock or feedback
abnormal
• Outdoor fan
motor lead wire
and connector
• Fan motor lock or
block
H98 Indoor high
pressure
protection
— — Indoor high pressure
protection (Heating)
• Check indoor
heat exchanger
• Air filter dirty
• Air circulation
short circuit
H99 Indoor
operating unit
freeze
protection
— — Indoor freeze
protection (Cooling)
• Check indoor
heat exchanger
• Air filter dirty
• Air circulation
short circuit
F11 4-way valve
switching
abnormality
4 times
happen within
30 minutes
— 4-way valve
switching abnormal
•4-way valve
• Lead wire and
connector.
F17 Indoor standby
units freezing
abnormality
3 times
happen within
40 minutes
— Wrong wiring and
connecting pipe,
expansion valve
leakage, indoor heat
exchanger sensor
open circuit
• 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
10 minutes
— Power factor
correction circuit
abnormal
• Outdoor PCB
faulty
F91 Refrigeration
cycle
abnormality
2 times
happen within
20 minutes
— Refrigeration cycle
abnormal
• Insufficient
refrigerant or
valve close
F93 Compressor
abnormal
revolution
4 times
happen within
20 minutes
— Compressor
abnormal revolution
• Power transistor
module faulty or
compressor lock
F94 Compressor
discharge
pressure
overshoot
protection
4 times
happen within
30 minutes
— Compressor
discharge pressure
overshoot
• Check
refrigeration
system
F95 Outdoor
cooling high
pressure
protection
4 times
happen 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)
LED 6 LED 5 LED 4 LED 3 LED 2 LED 1
Abnormality
judgement
Protection
operation
Problem Check location
Diagnosis
display
Abnormality
or
protection
control