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46
TROUBLESHOOTING GCCO-C CONT’D
NO FAN-Manual Mode
PROBABLE CAUSE
CORRECTIVE ACTION
Defective 120/24 VAC
transformer
Check for 24 VAC on “C” and “D” of the terminal block.
If 24 VAC is not measured:
Turn off and:
Check secondary coil for 1
Ω
.
Check primary coil for 18.9
Ω
.
Replace transformer.
If 24 VAC is measured:
Turn off and:
Check back-up relay for normal operation
.
Back-up relay not energizing
Check for 24 VAC on relay coil.
If 240 VAC is measured:
Turn unit off and:
Check back-up relay coil for 80
Ω
.
Replace if defective.
If 240 VAC is not measured:
Check back-up switch (SPDT) for normal operation.
Replace if defective.
Motor contactor not
energized
Check for 24 VAC at contactor or relay coil.
If 24 VAC is not measured:
Turn oven off and:
Check door switch for normal operation.
Check door switch for continuity.
Replace or adjust door switch.
If 24 VAC is measured:
Turn unit off and:
Check contactor coil for continuity.
Replace if defective.
No voltage across contactor
points
Check 120 VAC across “
C
” terminals of contactor.
If 120 VAC is not measured:
Check connection to main contactor (heat contactor).
If 208/240 VAC is measured:
Check across “
NO
” contacts. Should have 120 VAC.
Replace if defective.
Defective motor
Check for 120 VAC at motor.
If 120 VAC is measured,
Turn oven off:
Check motor winding’s for continuity.
Replace if defective.
If120 VAC is not measured:
Check wiring between motor and contactor.
Note: Motor should now be operating
.
Summary of Contents for GCCO-T
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...