Vollrath MGD18 Manual Para Operadores página 6

TROUBLESHOOTING
Problem
Oven will not turn on when the power
button on the front of the oven is
pressed.
Display on control panel is blank, oven is
plugged in and turned on.
Display shows an zone alarm: prb1,
prb2, prb3, prb4 and the control
panel emits a continuous beep.
Display will not change from Warming
to Redy.
Display changes from Warming to
Heating and does not display Redy.
Conveyor will not reverse direction.
Conveyor speed will not change.
Conveyor will not turn, but the oven
heats.
Top or bottom heater tubes do not heat. One or more heating elements may have
Oven repeatedly overheats.
The fan is not running.
The oven is turned off and the fan is
running.
6
Might be Caused By
Master On/Off switch on the back of the
oven is in the OFF position.
Oven is plugged into incorrect voltage. Check voltage at the wall outlet. Plug oven into correct voltage.
Control panel circuit breaker, located on
the back of the oven, may have tripped.
Temperature probe in the zone indicated
by the alarm code is not responding.
One heat zone may not be on.
Oven is plugged into incorrect voltage. Check voltage at the wall outlet. Plug oven into correct voltage.
Temperature setting in one or more
zones may be too high.
The conveyor may be obstructed.
The speed button was not been pressed
correctly.
There may be a problem with the drive
system relay.
Set button was not pressed after setting
the new speed.
There may be a problem with the driver
board.
The conveyor may be obstructed.
There may be a problem with one of the
components.
Conveyor circuit breaker, located on the
back of the oven, may have tripped.
burned out in the zone indicated by the
alarm code shown on the display.
The crumb tray may not be installed.
The fan may be dirty.
The fan blades may be dirty.
There may be a problem with the fan.
There may be a problem with the fan or
fan switch.
Normal operation. The fan turns on as
needed to cool the oven.
68 Inch Digital Conveyor Pizza Ovens Operator's Manual – Model MGD
Course of Action
Position the switch to the ON position.
Check for a broken heating element. Replace the element. After the
issue has been resolved, press the button on the circuit breaker to
reset it.
Press any key to turn off the alarm. Contact Vollrath Technical
Services.
Examine heating elements in each heat zone to verify they are
working.
Maximum temperature for each zone is 550
temperatures to below the maximum.
Check for and clear obstructions in the conveyor.
Press and hold the speed button until you hear two beeps.
Contact Vollrath Technical Services.
Press the Set button after changing the speed. See "Change the
Conveyor Speed" on page 4.
Contact Vollrath Technical Services.
Check for and clear obstructions in the conveyor.
Contact Vollrath Technical Services.
Press the button on the circuit breaker to reset it.
Press any key to turn off the alarm. Contact Vollrath Technical
Services.
Verify the crumb tray is installed.
Verify the fan blades of both fans are clean. See the instructions
below for inspecting and cleaning the fan blades.
Inspect the fan blades of both to see if they are dirty.
1. Press and hold the power button on the front of the oven until
the display shows OFF. Unplug the oven.
2. Wait 30 minutes for the oven cool.
3. Clean the fan blades.
4. Plug in the oven.
5. Press the power button on the front of the oven.
6. Press the reset button.
7. If the problem persists call Vollrath Technical Services.
Run the oven for 10 minutes. If the fan does not run, contact
Vollrath Technical Services.
Run the oven for 10 minutes. If the fan does not run, contact
Vollrath Technical Services.
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°
F. Adjust the