TurboChef NGC-1007, Service Manual

Page: 61 / 94

ISSUE RESOLUTION
F8: Heat Low
Oven Not Warming Up
1. Check that the blower motor is moving air.
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Blower motor is not moving air: Check blower motor assembly
and verify motor is stalled. Unplug oven and correct obstruction or
replace motor. (For access to motor shaft, remove top panel.)
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Blower motor is moving air: Verify high-limit thermostat is
not tripped. See the high-limit thermostat information below.
High-Limit Thermostat:
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Thermostat tripped: Reset and determine why the thermostat
tripped (See Figure 38, Item 114). Look for excess build up of
grease inside the oven or any other source for a fire.
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Thermostat is not tripped: Check main convection heater.
1. Convection heater is defective: Unplug oven and replace the
convection heater and verify the K4 SSR (Figure 37) is not
shorted across output.
2. Convection heater OK: Check the K4 SSR.
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K4 defective: Unplug oven and replace.
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K4 OK: Unplug oven and verify all wiring. Verify P1 voltage on
I/O board is 5.0VDC (+/- 0.02) - see Figure 40, page 54.
F2: Cook Temperature
Low
1. Verify Cook Door Operation.
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“Cook Door Open” Message: Verify which switch is not actuating
and readjust. See pages 38-43.
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Cook Door OK: Verify high-limit thermostat is not tripped. See
the high-limit thermostat below.
High-Limit Thermostat:
†
Thermostat tripped: Reset and determine why the thermostat
tripped (See Figure 38, Item 114). Look for excess build up of
grease inside the oven or any other source for a fire.
†
Thermostat is not tripped: Check main convection heater.
1. Convection heater is defective: Unplug oven and replace the
convection heater and verify the K4 SSR (Figure 37) is not
shorted across output.
2. Convection heater OK: Check the K4 SSR.
†
K4 defective: Unplug oven and replace.
†
K4 OK: Unplug oven and verify all wiring. Verify P1 voltage on
I/O board is 5.0VDC (+/- 0.02) - see Figure 40, page 54.
CONVECTION CIRCUIT TROUBLESHOOTING
THE CONVECTION CIRCUIT 49