Finish Thompson BE-15/15C - Manual (Page 26)

26
PROBLEM: CIRCUIT BREAKER AT POWER MAIN KEEPS TRIPPING.
Possible Cause 1: Wiring short to ground.
Check all wires for continuity to ground.
Disconnect electrical power to the BE unit before performing
continuity tests on the circuitry of the BE unit.
Systematically, check every wire connection for continuity to ground. The majority of the wires are
terminated in the circuit box inside the unit. Also check the wires on the On/off switch and all TAS’s. The
only wires in the entire electrical circuitry of the BE unit that should be grounded are wires #21 and
#22 from the Level Control Board. Any other problems or electrical shorts to ground must be eliminated,
or damage to electrical components will reoccur.
Possible Cause 2: Heater Band is defective.
Determine whether there is a fault within the Heater Band.
Disconnect electrical power to the BE unit before performing tests
on the Heater Band.
Locate wires #6 and #7 from the Heater Band’s Contactor and measure the resistance between them. There
should be 19
 of resistance through the Heater Band. Also check each wire (#6 and #7) for continuity to
ground. There should not be any continuity to ground.
If there is not 19
, or is continuity to ground, the Heater band is defective and must be replaced.
This can be verified by checking the wires attached to the Heater Band for possible shorts. The Terminals for
the Heater Band are located on the rear bottom of the Process Tank under the insulation. Refer to the
“Service Procedures: Heater Band Replacement” section of this manual for further details.
CAUTION:
CAUTION: