Holman qt14 - Manual (Page 7)

IF FURTHER ASSISTANCE IS REQUIRED:
CONTACT STAR/HOLMAN FACTORY SERVICE TEAM AT 1-800-807-9054
5
TROUBLESHOOTING GUIDE
#
UNIT WILL NOT HEAT, CONVEYOR BELT WILL NOT TURN.
o Be sure main circuit breaker is switched to the ON position.
o Check that the unit is connected to power and Master On/Off switch is ON.
o Be sure HEAT LIMIT SWITCH is pushed in (see below).
#
UNIT WILL NOT HEAT, CONVEYOR TURNS.
o Check to see if the Master On/Off Switch is in the ON position.
o Press heat limit switch, located beneath the unload tray as shown above
Your Holman Conveyor Oven is equipped with an automatically activated HEAT
LIMIT SWITCH that interrupts the heater tube connections if the air temperature in
the control box exceeds 190°F (88°C). This limit switch can be reset manually by
pushing the button in the center of the switch that is located beneath the unload
tray.
THE HEAT LIMIT SWITCH CAN BE ACTIVATED IF THERE IS NOT A PROPER
AMOUNT OF AIR FLOW BEING GENERATED BY THE COOLING FANS. IF THIS
OCCURS:
• DISCONNECT UNIT FROM POWER SOURCE.
• Make sure the air intakes in the front of the unit are free of dust, grease or other
obstructions.
• Make sure the crumb trays (heat reflectors) are in place (see photos this page
and page 2) NEVER OPERATE UNIT WITHOUT CRUMB TRAYS IN POSITION
AS THIS CAUSES OVERHEATING IN THE CONTROL BOX AND WILL SHUT
DOWN THE MACHINE.
• If the outside of the air intakes is clear and the crumb trays are in place and the
unit continues to shut down because of the Heat Limit Switch, refer to the
cleaning instructions in the more complete Preventative Maintenance section.
A heavy buildup of dust and grease from the kitchen can cover parts inside the
control box area and cause overheating.
Heat Limit Switch
Crumb Tray Slots