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

15
PROBLEM: PREMATURE SHUTDOWN.
Possible Cause 1: Electrical power outage.
If power to the unit is interrupted (even for a second), the unit will shut off. The cycle can be restarted by
pressing the On/off Switch ON (the unit may have to cool before it will restart).
Possible Cause 2: Distillate Piping has overheated from improper cooling.
Disconnect electrical power to the BE unit before performing tests
on any of the Temperature Actuated Switches.
Check TAS4 (units J91 or newer). This is a “normally closed” switch threaded into the piping between the
Condenser and Divert Solenoid Valve. It is a 1/2” diameter white ceramic sensor with a brass hex base and
two wires (#10 and #25) connected to it (it may be covered with a black plastic sheath). This switch opens if
the Distillate Piping reaches 150
 to 180F.
 If TAS4 is closed, then proceed to Possible Cause 4.
 If TAS4 is open (while unit is still hot), then check for problems in the cooling system. Proceed to
the section for your model (refer to the “Model Determination” section of this manual if unsure).
Cooling system problems with a BE-15 Water-cooled:
1. No, low, or improper water flow. The BE-15 requires a minimum cooling water flow rate of 1/2
gallons per minute. Water temp cannot exceed 80
F. Verify that water is turned on to this flow rate.
Warmer climates will require a higher flow rate, usually about 1 gallon per minute.
Also check for scale or mineral deposits at the water inlet and outlet connections on the left side of the BE
unit and at the Condenser’s water connections. Use a commercially available cleansing solution to
remove any deposits. If the build-up is severe, the Condenser may require replacement.
2. Water Control System is faulty. Verify the water supply to the unit. A Water Solenoid Valve
controls water flow through the Condenser.
 For units E91 or older, water should flow as soon as the unit is turned on. If it does not, disassemble
and clean the Water Solenoid Valve, or simply replace the valve.
 For units F91 or newer, the Water Solenoid Valve is controlled by TAS1. When the tank reaches
180
F, the sensor closes, energizing a coil to open the Water Solenoid Valve and allow the water to
flow. This usually takes about one hour. TAS1 is located on the top of the Process Tank (it is a 1/2”
diameter white ceramic sensor with a brass hex base and two wires #13 and #15 or #13 and #19
connected to it) is a “normally open” switch.
Place a jumper wire across TAS1. If the Process Tank is over 180
, and the water begins to flow, replace
TAS1. If water still does not flow, attempt to disassemble and clean the Water Solenoid Valve, or
simply replace the valve.
CAUTION: