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Service Manual STG5/7 intelligent STW5/7 intelligent form 9123999 rev. 05/2010
TROUBLESHOOTING
Symptom
Possible causes
no power to warmer controls.
Main breaker open.
1.
Switch malfunction.
2.
Wiring loose.
3.
Main fuse or breaker blows.
Wiring incorrectly.
1.
Heating element or blower shorted.
2.
Wiring shorted.
3.
Blower motor does not run.
Capacitor malfunction.
1.
Wiring loose.
2.
Motor inoperative.
3.
Lamps do not operate.
Lamp malfunction.
1.
Switch malfunction.
2.
Wiring loose.
3.
Warmer does not reach desired temperature.
Incorrect line voltage.
1.
Heater(s) inoperative.
2.
Thermometer malfunction.
3.
Thermostat malfunction.
4.
Blower motor inoperative (turning direction?)
5.
Dirty fanguard or fanblade.
6.
no indication on thermometer display.
Battery empty.
1.
Thermometer malfunction.
2.
Products dry out too fast.
no water in tray.
1.
TROUBLEShOOTING ThE STW5/7 WARMER