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40
TROUBLESHOOTING GCCO-AP
PROBABLE CAUSE
CORRECTIVE ACTION
Igniter continues to spark after
pilot is lit
Check pilot for strong flame and good contact with sensor.
Check sense wire for 12 to 13 micro amps on spark module. (Johnson
Control spark modules use “#4” terminal and Channel spark modules
use “Sense” terminal).
Turn oven off and check sense wire for continuity.
Replace sense wire or spark module as necessary.
Defective Module
Confirm that there is a pilot ignition.
Check for 24VAC at “MV” to ground.
Defective Isolation Transformer
Confirm that transformer is getting voltage.
Check transformer for normal operation.
Defective Door switch
Confirm that Door switch is getting voltage.
Check door switch for normal operation.
Defective Motor relay
Confirm that motor relay is getting power.
Check motor relay for normal operation. (24 VAC 39
Ω
)
Defective Motor
Confirm that motor is getting power.
Check motor for normal operation. (HIGH: P1-T7,T4) (LOW: P1-T9)
NO HEAT
NOTE:
The motor needs to be operational before the oven will start heating.
PROBABLE CAUSE
CORRECTIVE ACTION
Defective Probe
Confirm that probe is operating properly. (See Technical Data)
Defective Circuit board
Confirm that Heat Call light is on.
If no light is detected:
Check 12-position switch for normal operation. (See Technical Data)
If light is detected:
Check for 24VAC across heat output and “D” on 12 Pole terminal.
If voltage is not present:
Replace Circuit board.
If voltage is present:
Check over temperature thermostat for proper operation.
Check door switch for normal operation.
Defective Centrifugal Switch
Confirm that when motor is running that there is continuity through
Centrifugal switch.
Defective Hi Limit Thermostat
Check Hi Limit Thermostat for continuity.
Defective Solenoid Valve
Confirm that Valve is getting voltage.
Check Valve for normal operation.
Plugged Main Burner Orifice
Clean orifice.
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 ...