TC110 Series
Water Temperature Control Units 882.03888.00
•
09/19/2018
41
Problem
Possible cause
Solution
Temperature fluctuations/rapid
cycling from hot to cold.
Undersized connectors/water lines.
Increase size of connectors/ water
lines.
Long connecting lines between unit
and mold.
Move the unit closer to the mold
and shorten connecting lines.
Serpentine flow through mold.
Connect lines for parallel flow
instead of series flow.
Blocked water line in mold.
Check mold for metal chips or lime
buildup. Clean mold.
Quick disconnect fitting with check
valve.
Remove and replace fitting or
valve.
Lime buildup in unit piping.
Clean or replace.
Faulty TCU.
Check unit by connecting ¾” line
directly from To Process to From
Process line. Run unit to determine
if TCU controls set point
temperature.
Unit overheats or does not cool.
Drain is plugged or excessive back
pressure is in drain line.
Clear drain line or eliminate back
pressure condition.
Faulty solenoid valve.
Test solenoid valve by pressing
VENT
button and listen for valve
operation. Replace if faulty.
Controller Cool output relay open.
Replace output relay.
Solenoid valve is not operating, but
COOL
LED is on.
Set process temperature to
minimum and check for magnetism
on solenoid coil top.
Solenoid coil circuit is open.
Check coil resistance. If M
range,
replace solenoid coil.
Insufficient pressure differential
between cooling
WATER IN
and
OUT
lines.
Find a means to get less back
pressure in the
WATER OUT
line.
Cooling valve is undersized.
Replace cooling valve with a larger
valve.
Relief valve leaks.
Foreign material under valve seat.
Manually open valve to clear seat
of material.
High system pressure.
Reduce
WATER IN
or
MAKEUP
water
pressure.
Unit runs continuously cooling or
heating, and cannot attain set
point.
Unit under-sized for application.
Call sales representative.
