Panasonic NE-2140, Service Manual

Page: 34 / 57

DISPLAY CONDITIONS POSSIBLE CAUSE TIMING OF FAILURE INDICATION
F33 Open temperature
sensor (exhaust)
1. Temperature sensor failure
2. Digital programmer circuit failure
3. Loose connector CN5
It is appeared when failure
occurred.
F34 Short temperature
sensor (exhaust)
1. Temperature sensor failure
2. Digital programmer circuit failure
It is appeared when failure
occurred.
F44
1. Shorted power select switch
2. Shorted membrane switch
It is appeared 2 minutes after
failure occurred.
F01 / (With
continuous
beep sounds)
Exhaust
temperature
exceeds 120°C
1. Burning food in the oven due to over cook
It is appeared when exhaust
temperature exceeds above
120°C.
F03 Input voltage
12.5%
1. Increase in power source voltage
It is appeared when the unit is
plugged in. Note that it returns
normal operation mode by
tapping the RESET pad ( ).
F04 Input voltage is
less than — 12.5%
1. Decrease in power source voltage
It is appeared when the unit is
plugged in. Note that it returns
normal operation mode by
tapping the RESET pad ( ).
F05 Memory failure
1. Digital programmer circuit failure
No display 1.25/3A fuse blown
1. Switch failure (short switch)
2. Low-Voltage transformer failure
No display 1.25/3A fuse is OK
1. Thermal cutout failure
2. Low voltage transformer failure
3. Digital programmer circuit failure
F81 No voltage supply
to high voltage
trans. (lower/left)
1. Relay failure RY-3 (A)
2. Loose connector CN256, CN257
3. Digital programmer circuit failure
It is appeared when failure
occurred.
F82 No voltage supply
to high voltage
trans. (lower/right)
1. Relay failure RY-5 (B)
2. Loose connector CN258, CN259
3. Digital programmer circuit failure
It is appeared when failure
occurred.
F83 No voltage supply
to high voltage
trans. (upper/left)
1. Relay failure RY-7 (C)
Loose connector CN260, CN261
2. Digital programmer circuit failure
It is appeared when failure
occurred.
F84 No voltage supply
to high voltage
trans. (upper/right)
1. Relay failure RY-9 (C)
Loose connector CN262, CN263
2. Digital programmer circuit failure
It is appeared when failure
occurred.
F86 Shorted contacts
of RY-3
1. Replay failure RY-3 (A)
2. Digital programmer circuit failure
It is appeared when failure
occurred.
F87 Shorted contacts
of RY-5
1. Replay failure RY-5 (B)
2. Digital programmer circuit failure
It is appeared when failure
occurred.
F88 Shorted contacts
of RY-7
1. Replay failure RY-7 (C)
2. Digital programmer circuit failure
It is appeared when failure
occurred.
F89 Shorted contacts
of RY-9
1. Replay failure RY-9 (D)
2. Digital programmer circuit failure
It is appeared when failure
occurred.
[TROUBLE]Oven does not operate at all or oven does not start cooking. NE-2180, NE-2140
33
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