Panasonic NR-B30FW1 Service Manual page 28

9.3. The display sign list of self-diagnosis code.
Signal Symptom
U10 Warning that door is kept open.
H01 FC temperature sensor circuit has
trouble.
H02 PC temperature sensor circuit
has trouble.
H05 Sensor DEFROST circuit has
trouble.
H07 Sensor ATC circuit has trouble.
H10 SSC, Vegetable compartment
sensor circuit has trouble.
H12 PEC sensor circuit has trouble.
H31 FC defrost heater circuit has trou-
ble.
H35 Refrigerating unit has trouble.
(3-way valve / Gas leakage at
high pressure side / Poor com-
pression)
H36 Refrigerating unit has trouble.
(Gas leakage at low pressure
side)
H40 IPM & Compressor Protection
Control has trouble.
H41 Under voltage protection has
trouble.
H50 Communication error
H51 Control PCB has trouble.
H52 Control PCB has trouble. (Voltage
to compressor)
Check point
1.Close compartment door completely
2.Door SW PCB
3.Door aliment
4.Control PCB
1.Sensor FC
2.Sensor FC circuit
3.Control PCB
1.Sensor PC
2.Sensor PC circuit
3.Control PCB
1.Sensor DEFROST
2.Sensor DEFROST circuit
3.Control PCB
4.Thermal fuse
1.Sensor ATC
2.Sensor ATC circuit
3.Control PCB
1.Sensor SC circuit
2.Control PCB
1.Sensor PEC
2.Sensor PEC circuit
3.Control PCB
1.FC defrost heater
2.Thermal fuse
3.Control PCB
1.3-way valve
2.Gas leakage at high pressure side
3.Poor compression
1.Gas leakage at low pressure side
1.Control PCB
2.Compressor(Lock)
1.Power supply voltage
2.Control PCB
1.Control PCB
2.Operation PCB
3.Wire circuit between control PCB and
operation PCB
1.Control PCB
1.Control PCB
28
Condition
The sign is displayed when PC / FC
door is kept open for more than 1
minute.
Open or short
Open or short
Open or short
(Note) When DFC is opened,
thermal fuse is blown because of
too long defrosting time.
Open or short
Open or short
Open or short
Temperature of defrost Sensor
does not reach cut-off temperature.
Even if compressor runs, FC tem-
perature and DEF temperature
°C
would not be below 0 continu-
ously.
"H40" and "H36" display repeatedly. Replace parts
Over current flow into IPM for a
long time.
Low voltage add to unit for a long
time.
Micro-computer can not read or
write the data.
Emulation initialization judgment
error when power supply is turned
on.
Inverter voltage is too high. Inverter
voltage is too low.
Display release
Close the door, Adjust
the door, Replace the
door SW PCB, Replace
control PCB
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Sensor PEC can not
replace
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts