Troubleshooting; Tr Ou B Les H Oo T In G - Conair Thermolator TW-S User Manual

6-28 I Tr o u b l e sh o o ti n g
Tr o ubl esh ooti ng
Symptom
Unable to cool properly.
Heater failure.
Pressure relief valve leaks.
(Continued)
Possible Cause
Cooling water supply is not suf-
ficient.
Drain (cooling water return line)
is not sufficient.
Cooling valve is inoperative.
Plugged heat exchanger (only
on models with heat exchanger
option).
High backpressure in the cooling
water system
Unit not filled with water.
Faulty heater.
Plugged heater tube / flow restric-
tion.
The combined pressure of the
incoming cooling water pres-
sure and the unit pump pressure
exceeds the pressure rating of the
pressure relief valve.
Pressure relief valve stuck in
open position.
IMPORTANT: Always refer to the wiring
diagrams that came with your Thermolator
to locate specific electrical components.
Illustrations in the User Guide are intended to
be representative only.
Solution
Check to make sure the cool-
ing water supply is of sufficient
temperature, volume and pressure
for the unit.
Check the drain (cooling water
return line) to ensure there is no
restriction preventing water flow
to the drain (cooling water return
line).
Check the drain (cooling water
return line) and see if you can feel
or hear a change in the flow as the
cooling valve open and closes. If
you cannot hear or feel the flow
it is likely the valve has failed.
Replace valve if necessary.
Clean or replace heat exchanger.
Reduce backpressure.
Fill unit with water.
Replace heater.
Clear obstruction.
Install a pressure-reducing valve
on the incoming cooling water
line. Review the start-up proce-
dure for cooling water pressure
requirements at various operating
temperatures.
Replace valve.