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50
TROUBLESHOOTING GCCO-PP / -PT
To help troubleshoot the oven you should perform the following “Manual Override” test:
Open drop down door located on the lower right side, directly below front panel.
Turn back up toggle (on/off) switch to “on” position.
Turn main power switch to “on” position.
Check oven for normal operation.
FAILED IGNITION
PROBABLE CAUSE
CORRECTIVE ACTION
Defective Power Switch (-PP
only)
Confirm that toggle switch is getting correct voltage.
Check power switch for normal operation.
Defective Power Switch
output on circuit board
(JP37)
Confirm that
JP37
has
5VDC
in the off position and nominal voltage
in the on position.
If
JP37
has a constant
5VDC
check toggle switch for normal
operation.
Defective Ignition output
Check for 24VAC at
JP1
to Common (C)
If no voltage is present:
CPU is operating properly.
If voltage is present:
Output has failed.
Defective component
transformer
Confirm that 208/240VAC is feeding primary coil.
Confirm that 24VAC is at secondary coil.
Defective Spark Module
Check for 24VAC at
TH.
If no voltage is present:
Check component transformer.
If voltage is present:
Check for pilot ignition.
Replace spark module.
Defective pilot valve
Check for 24VAC at pilot valve.
If no voltage is present:
Check component transformer.
If voltage is Present:
Confirm valve is operational.
Defective flame sensor
Check flame sensor for 12 to 13 micro amps.
Replace flame sensor.
Plugged orifice
Clean orifice.
IMPORTANT NOTICE:
Power must be disconnected at source when disconnecting any ribbon cable or any
connector from CPU or Display. Failure to do so will result in damage to the Display board and CPU.
Summary of Contents for GCCO-C
Page 29: ...29 GENERAL CONT D ONE PAN TWO PAN THREE PAN FOUR PAN FIVE PAN ...
Page 59: ...59 TECHNICAL DATA CONT D GCCO C TEST POINT LAYOUT TP 2 TP 1 TP 3 TP 4 TP5 TP6 TP7 ...
Page 61: ...61 WIREING DIAGRAM GCCO T ...
Page 62: ...62 WIRING DIAGRAM GCCO AP ...
Page 63: ...63 WIRING DIAGRAM GCCO SII ...
Page 64: ...64 WIRING DIAGRAM GCCO C ...
Page 65: ...65 WIRING DIAGRAM GCCO PP ...
Page 66: ...66 WIRING DIAGRAM GCCO PT ...