M Series Wall Oven
M Series Wall Oven
Troubleshooting
4-14
#824974 - Revision C - November, 2016
3311
3312
3421
3422
3521
3522
3621
3622
1
1
2
2
2
2
2
2
Upper TCO open
Lower TCO open
Upper MDL timeout
Lower MDL timeout
Upper door open/unlocked in clean
Lower door open/unlocked in clean
Upper door locked, not in clean
Lower door locked, not in clean
See Procedure I.
See Procedure I.
1. Ensure MDL is moving.
2. Check J2-3 to J2-1 has
continuity when unlocked.
3. Check J2-2 to J2-1 has
continuity when locked.
1. Ensure MDL is moving.
2. Check J3-4 to J3-2 has
continuity when unlocked.
3. Check J3-3 to J3-2 has
continuity when locked.
1. Ensure MDL is moving.
2. Check J2-4 to J2-5 has
continuity when door
closed.
3. Check J2-2 to J2-1 has
continuity when locked.
1. Ensure MDL is moving.
2. Check J3-5 to J3-6 has
continuity when door
closed.
3. Check J3-3 to J3-2 has
continuity when locked.
1. Check if MDL is out of
position.
2. Check for continuity J2-2 to
J2-1 with door unlocked.
1. Check if MDL is out of
position.
2. Check for continuity J3-3 to
J3-2 with door unlocked.
1. Have environmental issue
corrected.
2. Repair wiring or insulation.
3. Replace TCO.
1. Have environmental issue
corrected.
2. Repair wiring or insulation.
3. Replace TCO.
If fault 0821, 1831, 2521, or
2820 replace relay board.
If lock or unlocked Micro
Switch is not closing replace
MDL.
NOTE: UIP will make 3
attempts of 45 second each
to sense MDL position before
it times out. If it times out the
breaker must be reset.
If fault 0822, 1832, 2522, or
2820 replace relay board. If
lock or unlocked Micro Switch
is not closing replace MDL.
NOTE: UIP will make 3
attempts of 45 second each
to sense MDL position before
it times out. If it times out the
breaker must be reset.
If fault 0821, 1831, 2521, or
2820 replace relay board.
If no continuity replace MDL.
NOTE: Door switch uses
magnet. Check if being
sensed.
If fault 0822, 1832, 2522, or
2820 replace relay board.
If no continuity replace MDL.
NOTE: Door switch uses
magnet. Check if in place.
If continuity between J2-2
and J2-1 with door unlocked
replace MDL.
If continuity between J3-3
and J3-2 with door unlocked
replace MDL.
Fault
Priority
Fault Message Test
Action
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