Lincoln IMPINGER 1100, Руководство по обслуживанию

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Impinger II –1100 Series Service Manual - Domestic 22
TROUBLESHOOTING GUIDE 1100 THRU 1103
ELECTRIC OVENS
MODEL 1100 / 120/208 VAC / SINGLE PHASE / 60 HZ
MODEL 1101 / 120/240 VAC / SINGLE PHASE / 60 HZ
MODEL 1102 / 120/208 VAC / THREE PHASE / 60 HZ
MODEL 1103 / 120/240 VAC / THREE PHASE / 60 HZ
REFER TO PROPER SCHEMATIC FOR IDENTIFIED COMPONENTS
SYMPTON POSSIBLE CAUSE EVALUATION
Oven fan will not run Incoming Power Supply Check circuit breakers. Reset if required. Call Power Co. if
needed.
Fuses, 10 Amp, Check, replace if necessary
Fuseholder Check, replace if necessary
Switch, Main Fan Check for continuity between switch terminals.
Main Fan Relay Check continuity of 120 VAC coil. Check for power to
relay coil (120 VAC). Check for 208/240 VAC to the relay
terminals
Main Fan Motor Check for opens, shorts, or grounds. WITH POWER
OFF: Turn fan blade to check for locked rotor
Capacitor Check for opens, shorts, or grounds.
No control box cooling Check for main fan operation. If not operating, refer to
"Oven fan will not run". Cooling Fan Motor 120 VAC
should be present at the fan motor. If voltage is present,
check for opens or shorts. .WITH POWER OFF: Check
for locked rotor of the fan motor.
No main fan cool down Cool Down Thermostat Check cool down thermostat (thermostat closes at 160°F
and opens at 140°F). Check for power (120 VAC) at cool
down thermostat. With cool down thermostat preheated,
check for continuity. If switch is open, replace.
Oven will not heat Main Fan Motor Check for main fan operation. If it is not operating, refer
to "Oven fan will not run".
High Limit Thermostat, Oven
Cavity
Terminals are normally closed. If open, reset the
thermostat and test for proper operation. If it will not
reset and hold, then replace.
Switch, Heat With switch on, check for 120 VAC on both terminals to
neutral. Replace if defective
Air Pressure Switch This normally open switch should close when the main
fan is activated. If adjustment is necessary (Refer to
Section D). Replace if defective.
Fuse, 3 Amp Check, replace if necessary.
Fuseholder Check, replace if necessary
Temperature Control Check for 120 VAC supply at terminal #11 to neutral on
temperature control. If no voltage is present, trace wiring
back to 3 amp fuse. Turn the temperature adjustment
knob to maximum temperature position and check for
120 VAC at the load terminal (#9) and neutral. If 120
VAC is present and unit is not heating, refer to "Mercury
Contactor" for next check. If 120 VAC is not present,
proceed.
Thermocouple Probe WITH POWER ON AND THERMOCOUPLE LEADS
ATTACHED TO THE TEMPERATURE CONTROL
BOARD: measure D. C. millivolt output of these leads.
Refer to thermocouple chart on page 36 for proper
readings. If these readings are not achieved, replace
thermocouple.