Finish Thompson BE-15/15C - Manual (Page 19)

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1. Improper maintenance. If the Process Tank is not drained after every run and the Residues are slow
to drain, most likely there is a Residue build-up. Proper maintenance is the key to preventing a build-
up in the Process Tank.
2. Large concentrations of solids in the waste coolant or in the Residue during a Residue Run.
3. Oil or transmission fluid is present in the waste coolant. When this is the case, the residue is less
likely to be flushed away with the “Flush” procedure during maintenance.
Possible Cause 5: TAS2 is too sensitive.
Check whether the temperature of the Process Tank. The most accurate method of measuring the piping
temperature is to remove TAS2 from its mount and insert a temperature probe in its place.
 If TAS2 has opened the Process Tank’s temperature is less than 385, then TAS2 is too sensitive.
Replace TAS2.
 If TAS2 has opened and the temperatures are higher than allowable, re-check Possible Cause 4.
Possible Cause 6: Intermittent ground on Process Tank.
Verify that there is more than 3 1/2 gallons of liquid in the Process Tank and check the red LED on the
Level Control Board (located in the lower right corner of the BE’s circuit box).
 If the LED is not lit, check the Process Tank’s ground wire connection. This wire is attached to the
Process Tank with a screw (behind the small access panel in the tank’s insulation). This connection
can become corroded and not allow the Level Control to function. Remove the screw, file the metal
clean, and re-attach the wire with a new screw and new crimp connector.
If the screw is too corroded to remove, drill and tap a new hole for the ground into the same metal
slab, next to the old screw.
Do not drill a hole into or through the Process Tank.
Drill into the welded metal slab only. Maximum drill depth is 1/4”.
 If the LED on the Level Control Board is lit, the unit should turn on (if the Distillate Piping is cool).
An intermittent connection can be difficult to detect. Watch for flickering of the LED, or attempt to
check the LED as soon as the unit shuts off (prematurely).
CAUTION: