Trouble) Oven Stops Operation During Cooking - Panasonic NN­GS595A Service Manual

10/24/2016
H02 Memory IC error (It is able to show up both in test mode and cooking mode) SYMPTOM SYMPTOM
H00 RAM failure (It is able to show up both in test mode and cooking mode)
H20 Steam heater open error
U14 No water during steam cooking (It is able to show up both in test mode and cooking mode)
U40 No load operation
U65 Power down controlled by magnetron thermistor
HOT Oven is hot (It is able to show up both in test mode and cooking mode)
7.1 (Trouble) Oven stops operation during cooking
SYMPTOM
Oven stops in 3 seconds after
pressing start pad.
1.
Oven stops in 23 seconds after
pressing start pad.
Oven stops in 1 minute after pressing
start pad. (Oven cooking)
Oven stops in 30 seconds after
pressing start pad. (Steam cooking)
No display and no operation at all.
2.
Fuse is blown.
7.2 (Trouble) Other troubles
SYMPTOM
Oven is dead.
Fuse is OK.
1.
No display and no operation at
all.
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CAUSE
Usage problem
No input AC is supplied to H.V.Inverter (U) CN702
terminals
H.V.Inverter (U) operates by the control signals from
DPC but magnetron is not oscillating
Oven thermistor circuit is not functions.
Steam heater thermistor circuit is not functions.
Most probably loose connection of connectors, or door
latch mechanism is not adjusted properly
CAUSE
1. Open or loose lead wire harness
2. Open thermal cutout
3. Open low voltage transformer
4. Defective DPC
1. Shorted lead wire harness
CAUSE
CAUSE
Check fan motor if thermal cutout is
defective.
CORRECTIONS CORRECTIONS
CORRECTIONS
1. Latch Switch
2. Power relay RY­1
3. Loose lead wire connector
CN701, CN702
1. Magnetron
2. Loose lead wire connector
CN703
1. Oven thermistor
2. Loose wiring
1. Steam heater thermistor
2. Loose wiring
3. bad conductibility between
thermistor and steam heater
1. Align door, Door Latch
Switches
2. Loose wiring connectors
CORRECTIONS
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