Impinger 3270 Service Manual – Dom & Int’l
13
TROUBLESHOOTING GUIDE - INTERNATIONAL
Model Number
Gas Type
Voltage
Hz.
Phase
3270 CE
Natural Gas
230 VAC
50 Hz
1 Phase
3270 CE
LP Gas
230 VAC
50 Hz
1 Phase
SYMPTOM
POSSIBLE CAUSE
EVALUATION
Oven fan will not run
Incoming Power Supply
Check breakers, reset if required. Check power plug to be
sure it is firmly in receptacle. Measure the incoming power.
Call power company if needed.
Fuse, 10 Amp
Check, replace if necessary.
Fuse Holder
Check, replace if necessary.
Emergency Stop Button
This is a normally closed switch. Be sure button is re-set.
Check continuity between switch terminals. If switch is
open, replace Emergency stop button.
Main Oven Switch
Check continuity between terminals. Replace if necessary.
Time Delay Relay
Check for line voltage to the relay coil. If voltage is not
present, trace wiring back to the oven power switch. If
voltage is present, check to insure contacts are closing.
Replace as needed.
Time Delay
Line voltage is permanently supplied to terminal #1 of the
time delay. If no voltage present trace wiring back to fuse
and incoming power. Neutral side of time delay coil is
switched by the time delay relay. When the time delay is
enabled, line voltage is supplied to coil of main fan relay.
Main Fan Relay
Check for line voltage to main fan relay coil. If no voltage is
present, trace wiring back to time delay. If line voltage is
supplied to main fan relay coil, ensure the contacts of main
fan relay are closing by checking for output voltage from
relay contacts. If contacts are not closing, replace relay.
Each terminal supplies a main fan motor with line voltage.
Main Fan Motor
Check for line voltage at motor. If voltage is present and
motor doesn’t turn, WITH POWER OFF, check for opens,
shorts, or grounds. Turn fan blade to check for locked
rotor. Replace as needed.
Capacitor
WARNING: Capacitor has a stored charge, discharge
before testing. Check for shorts or grounds, replace as
needed. Inspect for any visible damage. If the top of the
capacitor appears to be swollen, replace capacitor.
No control box cooling
Incoming Power
Check main circuit breakers and reset, if required. Call
power company if needed.
Fuse, 10 Amp
Check, replace if necessary.
Fuse Holder
Check, replace if necessary.
Main Oven Switch
Check continuity between terminals. Replace if necessary.
Cooling Fan(s)
Line voltage should now be at the fan motor. If voltage is
