Panasonic NR-B53VW2

41
9.5. Instruction of Self Diagnosis Display Code.
Signal Symptom Check point Condition Display release
U10 Warning that door is kept open *1 1. Close compartment door completely
2. Door SW PCB
3. Door alignment
4. Control PCB
The sign is displayed when
PC/FC door is kept open for
more than 1 minute.
Close the door, Adjust
the door, Replace the
door SW PCB,
Replace Control PCB
H01 FC temperature sensor circuit has
trouble
1. Sensor FC
2. Sensor FC circuit
3. Control PCB
Open or short Replace parts
H02 PC temperature sensor circuit has
trouble
1. Sensor PC
2. Sensor PC circuit
3. Control PCB
Open or short Replace parts
H05 Sensor DEFROST circuit has trouble 1. Sensor DEFROST
2. Sensor DEFROST circuit
3. Control PCB
4. Thermal fuse
Open or short (Note) when
DFC is opened, thermal fuse
is blown because of too long
defrosting time.
Replace parts
H07 Sensor ATC circuit has trouble 1. Operation PCB Short or open with ATC
sensor.
Replace Operation
PCB (ATC sensor is
chip parts on Opera-
tion PCB, not change-
able )
H10 SSC, Vegetable compartment sensor
circuit has trouble
1. Sensor SC circuit
2. Control PCB
Open or short Replace parts
H12 DFP sensor circuit has trouble 1. Sensor DFP
2. Sensor DFP circuit
3. Control PCB
Open or short Replace parts
H27 Lock/Disconnection of PC fan motor
circuit *2
1. PC Fan motor
2. Control PCB
3. Something blocks the motion
Open or Lock Replace parts
H28 Fan motor (for compr.) has trouble
*3
1. Fan motor (for compressor)
2. Control PCB
3. Something blocks the motion
Open or Lock Replace parts
H29 Lock of FC fan motor circuit *4 1. FC fan motor.
2. Control PCB
3. Locked by Ice
Open or Lock Replace parts
H31 FC defrost heater circuit has trouble
*5
1. FC defrost heater
2. Thermal fuse
3. Control PCB
Temperature of FC defrost
sensor does not reach Cut-
off Temp.
Replace parts
H32 PC defrost heater circuit has trouble
*6
1. PC defrost heater
2. Thermal fuse
3. Control PCB
Temperature of PC defrost
sensor does not reach Cut-
off Temp.
Replace parts
H34 Refrigerating unit has trouble (3-Way
Valve has trouble) *7
1. Control PCB
2. 3-Way valve
Even if compressor runs,
temperature of defrost
Sensor would not be below
the regulation.
Replace parts
H35 HC refrigerant detection (High
pressure leak) *11
1. 3-Way valve
2. Gas leakage at high pressure side
3. Poor compression
Even with compressor runs,
FC temperature and DEF
temperature would not be
below 0°C continuosly.
Replace parts
H36 HC refrigerant detection (Low
pressure leak) *12
1. Gas leakage at low pressure side “H40” and “H36” display
repeatedly.
Replace parts
H38 Disconnection of FC fan motor *13 1. FC fan motor Open Replace parts
H40 Compressor has trouble (Inverter
Protection Control) *8
1. Compressor
2. Control PCB
Compressor locked with
some trouble or inverter
protection control worked.
Replace parts
H41 Insufficient power voltage protection
*8
1. Power supply voltage
2. Control PCB
Control PCB detects low
(voltage) power supply.
Check power supply or
replace Control PCB
H50 Communication error *9 1. Control PCB
2. Operation PCB
3. Wire circuit between Control PCB
and Operation PCB
Microcomputer on Control
PCB cannot read the data
from Operation PCB.
Replace parts
H51 Control PCB has trouble (EEPROM)
*10
1. Control PCB When the power is on,
microcomputer can not read
or write the data.
Replace parts