Self Diagnosis Function - Panasonic NR-F532TT Servise Manual

10.2. SELF DIAGNOSIS FUNCTION

When abnormality is caused in the refrigerator, the sign is displayed on LED.
Indication contents
The sisplay sign list is put on the PCB cover in the back of cabinet.
Signal Symptom
U10 Warning that door is kept open.
H01 FC temperature sensor circuit has
trouble.
H02 PC temperature sensor circuit has
trouble.
H04 Ice making sensor has trouble.
H05 DEFROST sensor circuit has trou-
ble.
H07 ATC sensor circuit has trouble.
H10 SC sensor circuit has trouble.
H21 Ice maker has trouble.
(Stop to protect ice maker)
H28 Fan motor for compressor room is
opened or locked.
H29 Fan motor for evaporator is
opened or locked.
H31 Defrosting circuit has trouble.
H35 Refrigerating unit has trouble.
(Gas leakage at high pressure
side// Poor compression)
H36 Refrigerating unit has trouble.
*1 (Gas leakage at low pressure
side)
H38 Rotation of FC fan motor has trou-
*1 ble.
H40 IPM & Compressor Protection
Control has trouble.
H41 Undervoltage protection has trou-
ble.
H43 Fan motor for evaporating pan is
*3 opened or locked.
H50 Communication error
H51 Transmit in PCB has trouble.
*1
1. 2 character type of LED is adopted on this model.
Then, if "H01"display, the sign "H"and next to "01".(The sign separates twice sign.)
2. *1...These display appear when an service function is controlled.(Normally customer can not see these indications.)
3. Check the "Check point" according to lower number(1.2.3.)
Check point
1.Close compartment door completely
2.Door swich circuit
3.Door aliment
4.Control PCB
1.PC sensor circuit
2.Control PCB
1.PC sensor circuit
2.Control PCB
1.IC sensor circuit
2.Control PCB
1.DEF sensor
2.DEF sensor circuit
3.Control PCB
4.Thermal fuse
1.ATC sensor
2.ATC sensor circuit
3.Control PCB
1.SC sensor
2.Control PCB
1.Ice maker
2.Rotation part of ice maker
3.Control PCB
1.Fan motor(compressor room)
2.Fan motor circuit
3.Something touches fan blade
1.Fan motor for evaporator
2.Fan motor circuit
3.Ice foam touches fan blade
1.FC defrost heater
2.Thermal fuse
3.Control PCB
1.Swiching valve
2.Gas leakage at high pressure side
3.Poor compression
1.Gas leagage at low side
1.Control PCB
2.Fan motor(FC)
1.Control PCB
2.Compressor(Lock)
1.Power supply voltage
2.Control PCB
1.Something touches fan blade.
2.Fan motor for evaporating pan
3.Fan motor circuit
4.Control PCB
1.Control PCB
2.Operation PCB
3.Wire circuit between control PCB and
operation PCB
1.Control PCB
22
Condition
Sign appears when you leave the
door open more than 1 minutie.
Open or short
Open or short
Open or short
Open or short
Open or short
Open or short
When ice maker operates more
than 1 minute continuously.
Open or short
Open or short
Temperature of defrost Sensor
does not reach cut-off tempera-
ture.
Even if compressor runs, FC
temperature and PC temperature
would not be blow 0°C continu-
ously.
"H40" and "H36" display repeat-
edly.
Open circuit between PCB and
fan- Fan motor
(signal circuit of detector for fan
motor is opened) *2
Over current flow into IPM for a
long time.
Low voltage add to unit for a long
time.
Open or short
The signal does not flow IC1 and
IC201.
Micro- computer can not read or
write the data.
Display release
Close the door
Adjust door
Replace door swich
Replace parts
Reset display
or
Replace parts
Replace parts
Reset display
or
Replace parts
Replace parts