Panasonic PAPAMY1604017CE, Service Manual

Page: 31 / 46

31
Diagnosis
display
Abnormality
or
protection
control
LED 6 LED 5 LED 4 LED 3 LED 2 LED 1
Abnormality
judgement
Protection
operation
Problem Check location
H37 Outdoor liquid
pipe
temperature
sensor
abnormality
O O O Continuous
for 5s Cooling
protection
operation only Outdoor liquid pipe
temperature sensor
open or short circuit

Outdoor liquid
pipe temperature
sensor lead wire
and connector
H64 Outdoor high
pressure
sensor
abnormality
O O 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
O O O 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
O O O ― ― Indoor high pressure
protection (Heating) 
Check indoor
heat exchanger

Air filter dirty

Air circulation
short circuit
H99 Indoor
operating unit
freeze
protection
O O O ― ― Indoor freeze
protection (Cooling)

Check indoor
heat exchanger

Air filter dirty

Air circulation
short circuit
F11 4-way valve
switching
abnormality
O O O O 4 times
happen within
30 minutes
― 4-way valve
switching abnormal

4-way valve

Lead wire and
connector.
F17 Indoor standby
units freezing
abnormality
O 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
O O 4 times
happen within
10 minutes
― Power factor
correction circuit
abnormal

Outdoor PCB
faulty
F91 Refrigeration
cycle
abnormality
O O 2 times
happen within
20 minutes
― Refrigeration cycle
abnormal

Insufficient
refrigerant or
valve close
F93 Compressor
abnormal
revolution
O O O 4 times
happen within
20 minutes
― Compressor
abnormal revolution

Power transistor
module faulty or
compressor lock
F94 Compressor
discharge
pressure
overshoot
protection
O O 4 times
happen within
30 minutes
― Compressor
discharge pressure
overshoot

Check
refrigeration
system
F95 Outdoor
cooling high
pressure
protection
O O O 4 times
happen within
20 minutes
― Cooling high
pressure protection

Check
refrigeration
system

Outdoor air
circuit