TC110 Series
Water Temperature Control Units 882.03888.00
•
09/19/2018
42
Problem
Possible cause
Solution
Unit does not heat/cannot achieve
set point.
Defective heater contactor.
Visually inspect coil and contacts;
repair/replace defective
contactors.
Defective immersion heater.
Check resistance on all three (3)
legs of the heater with an ohm
meter. If not all equal, contact
factory for replacement heater.
Controller heat output open.
Check the heater output with an
ohm meter to ground. It should
read in the mega-ohm range.
Infinite or zero readings indicate a
defective output.
Heater contactor is not energizing,
but
HEAT
LED is on.
Set process temperature to
maximum and check for control
voltage at heater contactor.
Immersion heater elements dirty.
Remove heater and clean
elements.
Immersion heater element is
burned out.
Check heater tank for
scorched/discolored paint. Check
resistance on all three (3) legs of
the heater with an ohm meter.
Replace heater as required.
Check for balanced amp draws, and
supply voltage. If not present
replace immersion heater.
OUT1
indicator is on, but no voltage
on heater contact.
Replace relay board on controller.
Cooling valve is leaking.
Dismantle valve and clean out.
Solenoid valve is not operating, but
COOL
LED is on.
Set process temperature to
minimum and check for magnetism
on top of solenoid coil.
Magnetism on coil.
Clean coil.
Faulty/dirty solenoid valve.
Press
VENT
button several times to
flush the valve.
