Troubleshooting Guide Chart - GBC Ultima 65 Service Manual

5.7 TROUBLESHOOTING GUIDE CHART

SYMPTOM
No power.
Power, no heat.
Not hot enough, or
too hot.
Power, heat, will
not run.
Runs one speed
or reverse only.
Unit does not
go to ready.
5.0 TROUBLESHOOTING
PROBABLE MALFUNCTION
No outlet power.
Power cord disconnected.
Blown fuse.
Tripped circuit breaker.
Tripped TCO.
Power switch.
Bad connections.
Bad Main PCB (PCB1).
Bad connections.
Infrared heaters bad.
Triac failed.
Heat sensor failed.
Bad Main PCB (PCB1).
Main PCB (PCB1) not
calibrated.
Triac failed.
Heat sensor failed.
Bad connections.
Blown motor fuse.
Interlock switches not engaged.
Bad motor.
Bad Transformer.
Bad Main PCB (PCB1).
Bad Main PCB (PCB1).
Bad Control Panel PCB (PCB2).
Main PCB (PCB1) not calibrated.
Bad Control Panel PCB (PCB2).
Heat sensor failed.
CORRECTIVE ACTION
Check outlet for correct voltage.
Connect power cord.
Check continuity, replace if needed.
Reset circuit breaker.
Reset or replace TCO.
Replace switch.
Inspect for loose connections.
Replace board.
Inspect for loose connections.
Check for 16 Ohms, if not replace
heaters.
Test triac, replace if needed.
Test continuity, replace if needed.
Replace board.
Calibrate Main PCB (PCB1) using
current calibration procedures.
Test triac, replace if needed.
Test continuity, replace if needed.
Inspect for loose connections.
Check continuity, replace if needed.
Ensure tray and shield switches are
engaged.
Check continuity, replace if needed.
Check for 3-32 VDC, replace if
needed.
Test output, replace if needed.
Replace Main (PCB1).
Replace Control Panel (PCB2).
Calibrate Main PCB (PCB1) using
current calibration procedures.
Replace Control Panel (PCB2).
Test continuity, replace if needed.
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