Troubleshooting
M Series Wall Oven
M Series Wall Oven
4-17
#824974 - Revision C - November, 2016
Fault
Priority
Fault Message Test
Action
4910
4A10
5021
5022
5121
5122
5220
5320
5431
5432
1
1
2
2
2
2
2
2
3
3
Upper cooling fan HES stall detect-
ed
Lower cooling fan HES stal detect-
ed
Upper cavity over temp during
clean
Lower cavity over temp during
clean
Upper cavity over temp during non-
clean
Lower cavity over temp during non-
clean
Relay board ambient over temper-
ature
UIP ambient over temperature
Low rate-of-rise, upper self-clean
Low rate-of-rise, lower self-clean
Cooling fan rotation is not reg-
istering/not rotating.
Cooling fan rotation is not reg-
istering/not rotating.
Over 950° F. Test oven tem-
perature per test procedure G.
Over 950° F. Test oven tem-
perature per test procedure G.
Over 600° F. Test oven tem-
perature per test procedure G.
Over 600° F. Test oven tem-
perature per test procedure G.
Above 185° F in relay board
area.
Above 185° F in UIP area.
Temperature issue. See
Procedure H.
Temperature issue. See
Procedure H.
1. Verify HES harness seated.
2. Verify correct relay board.
3. Replace cooling fan.
1. Verify HES harness seated.
2. Verify correct relay board.
3. Replace cooling fan.
1. Flash UIP board.
2. Replace UIP board.
3. Replace relay board.
1. Flash UIP board.
2. Replace UIP board.
3. Replace relay board.
1. Flash UIP board.
2. Replace UIP board.
3. Replace relay board.
1. Flash UIP board.
2. Replace UIP board.
3. Replace relay board.
1. Measure and compare
temperature in diagnostics
(Control tab) to thermo-
couple. If not reading cor-
rectly replace relay board.
2. Check for obstructions in
air channel.
3. Check cooling fan(s).
1. Check for obstructions in
air channel.
2. Check cooling fan(s).
3. Measure temperature at
UIP. If not getting that hot
replace UIP.
1. Report voltage issue.
2. Bad element or wiring
repair or replace.
3. Replace UIP.
1. Report voltage issue.
2. Bad element or wiring
repair or replace.
3. Replace UIP.
Temperature Related Faults
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