TROUBLESHOOTING
Del uxe Contr ol Cook & Hold ▪ Ser vic e Manua l ▪ MN- 4671 2 ▪ R ev 01 ▪ 1 1/ 20
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If you are not getting 12VDC to the interface
board, measure the DC voltage output of the
power supply. Do you get 12VDC?
No
Inspect/repair wiring and connections
between power supply and the control board.
Yes
Measure the AC voltage coming into the power
supply. Do you read line voltage?
No
Replace the power supply and retest
Yes
Measure the AC voltage between the output of the
circuit breakers (or power switch for 300-TH). Do
you read line voltage?
No
Inspect/repair wiring and connections
between circuit breakers/power switch and
the power supply. Retest.
Yes
Measure the AC voltage between the input of the
circuit breakers (or power switch for 300-TH). Do
you read line voltage?
No
Reset the circuit breakers. If a circuit breaker
trips right away, you will need to diagnose for
the shorted component. If a circuit breaker
does not close after resetting, replace it. If the
power switch does not pass voltage when in
the ON position, replace the power switch.
Yes
Measure the incoming AC voltage to the oven at
the power terminal block. Do you measure line
voltage?
No
Inspect/repair wiring and connections
between incoming power terminal block and
circuit breakers/power switch. Retest.
Yes
Do you have AC voltage at the outlet the unit is
plugged into (if applicable)?
No
Check continuity through power cord and
replace as needed.
Yes
Check the facility breaker. Reset as needed.
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