M Series Wall Oven
M Series Wall Oven
Troubleshooting
4-12
#824974 - Revision C - November, 2016
1B21
1B22
1C21
1D21
1E22
1F22
2030
2130
2230
2330
2420
2521
2522
2631
2632
2720
2
2
2
2
2
2
3
3
3
3
2
2
2
3
3
2
Upper cooling fan triac shorted
Lower cooling fan triac shorted
Both upper bake element DLB's
open
Both upper broil element DLB's
open
Both lower bake element DLB's
open
Both lower broil element DLB's
open
Relay board ambient thermistor cir-
cuit fault
Relay board voltage calibration
failed
Relay board RTD circuit calibration
failed
Relay board relay circuit calibration
failed
Relay board RTD circuit fault
Relay board upper MDL input cir-
cuit fault
Relay board lower MDL input circuit
fault
Relay board upper door switch cir-
cuit fault
Relay board lower door switch cir-
cuit fault
Output drive watchdog fault
Back pin J5-6 and test for
voltage to ground with cooling
fan off.
Back pin J6-7 and test for
voltage to ground with cooling
fan off.
Back pin P2-6 and test for
voltage to ground with bake
element energized.
Back pin P4-6 and test for
voltage to ground with broil
element energized.
Back pin P6-6 and test for
voltage to ground with bake
element energized.
Back pin P8-6 and test for
voltage to ground with broil
element energized.
Relay board ambient thermis-
tor circuit fault. Not able to
test
Relay board voltage not cali-
brated. Not able to test.
Unable to test relay board
RTD circuit.
Relay board relays not cali-
brated. Not able to test.
Relay board RTD internal cir-
cuit fault. Not able to test.
Relay board MDL input circuit.
Not able to test.
Relay board MDL input circuit.
Not able to test.
Relay board internal door
switch circuit fault. Not able
to test.
Relay board internal door
switch circuit fault. Not able
to test.
Element or MDL watchdog
fault. Not able to test.
See Procedure D.
See Procedure D.
If voltage is not between 115
VAC ±25 VAC replace relay
board.
If voltage is not between 115
VAC ±25 VAC replace relay
board.
If voltage is not between 115
VAC ±25 VAC replace relay
board.
If voltage is not between 115
VAC ±25 VAC replace relay
board.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
See Procedure A.
Fault
Priority
Fault Message Test
Action
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