UPDATED A5 Panasonic technical handbook F 2025 - Flipbook - Page 37
RAC - Fault Codes
Diagnosis Code
H97
H98
H99
F11
Indoor operating unit freeze
protection
4-way valve switching
abnormality
Indoor standby units freezing
abnormality
F90
Power factor correction (PFC)
circuit protection
F93
F94
F95
F96
F97
F98
F99
Abnormality Judgment
Protection Operation
Problem
Check location
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
-
Indoor high-pressure protection Check indoor heat exchanger - Air filter
(Heating)
dirty - Air circulation short circuit
Indoor high-pressure protection -
F17
F91
37
Abnormality / Protection
control
Outdoor fan motor mechanism
lock
-
-
4 times happen within 30
minutes
-
3 times happen within 40
minutes
4 times happen within 30
minutes
2 times happen within 20
Refrigeration cycle abnormality
minutes
Compressor abnormal
4 times happen within 20
revolution
minutes
Compressor discharge
4 times happen within 30
overshoot protection
minutes
Outdoor cooling high pressure 4 times happen within 20
protection
minutes
Power transistor module
4 times happen within 20
overheating protection
minutes
Compressor overheating
3 times happen within 30
protection
minutes
3 times happen within 20
Total running current protection
minutes
Outdoor direct current (DC)
Continuous happen for 7 times
peak detection
Indoor freeze protection
(Cooling)
4-way valve switching
abnormal
Check indoor heat exchanger - Air filter
dirty - Air circulation short circuit
4-way valve - Lead wire and connector
-
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
-
Power factor correction circuit
abnormal
Outdoor PCB faulty
-
Refrigeration cycle abnormal
Insufficient refrigerant or valve close
Compressor abnormal
revolution
Compressor discharge pressure
overshoot
Cooling high pressure
protection
Power transistor module
overheat
Power transistor module faulty or
compressor lock
-
Compressor overheat
Insufficient refrigerant
-
Total current protection
-
Power transistor module
current protection
-
Check refrigeration system
Check refrigeration system - Outdoor
air circuit
PCB faulty - Outdoor air circuit (fan
motor)
Check refrigeration system - Power
source or compressor lock
Power transistor module - faulty or
compressor lock
