Blodgett MT3870 Installation, Operation & Maintenance Manual page 30

Maintenance
Troubleshooting Guide
POSSIBLE CAUSE(S)
SYMPTOM: Oven will not reach desired temperature
Gas pressure to oven is too low
S
Top air plates missing
S
Temperature hi-limit system out of adjustment
S
Internal problem with main temperature control
S
SYMPTOM: Conveyor belt will not run
Computer Control turned OFF
S
Emergency stop switch on OFF
S
Control circuit breaker tripped
S
Belt hooked on something in oven
S
Defective conveyor drive motor
S
Defective conveyor drive motor controller
S
Loose computer control cord connection
S
SYMPTOM: Burner operates sporadically
Air pressure switch out of adjustment
S
Thermal switch tripped
S
SYMPTOM: Control panel displays Temp - Limit and buzzer sounds
SYMPTOM: Hood system does not operate when oven is on
Fan exhaust supply problem
S
Defective interlock circuit
S
*Denotes remedy is a difficult operation and should be performed by qualified personnel only. It is recommended, however, that
All repairs and/or adjustments be done by your local Blodgett service agency and not by the owner/operator. Blodgett cannot as-
sume responsibility for damage as a result of servicing done by unqualified personnel.
WARNING!!
Always disconnect the power supply before cleaning or servicing the oven.
SUGGESTED REMEDY
Check quick disconnect for proper seating
S
Contact local gas representatives
S
Install air plates
S
*
S
*
S
Press ON/OFF key
S
Pull switch out to ON
S
*
S
Turn oven OFF, unhook and repair problem
S
*
S
*
S
*
S
*
S
*
S
Turn oven OFF and wait for oven to cool down
S
Contact HVAC service
S
*
S
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