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AEC/Appllcation Engineering
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7
Troubleshooting
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Temperature fluctuations/
Undersized connectors/lines.
Increase size of connectors/
rapid cycling from hot to cold.
lines.
Long connecting lines
Move the unit closer to the
mold and shorten connecting
between unit and mold.
lines.
Serpentine flow through
Connect lines for parallel flow
mold.
instead of series flow.
Blocked line in mold.
Check mold for metal chips
or deposits. Clean mold.
Quick disconnect fitting with
Do not use quick disconnect
check valve.
with check valve.
Carbon build-up in unit piping
Clean or replace affected
or fittings.
piping. Replace fluid.
RETURN valve closed.
Open RETURN valve.
Check unit by connecting line
directly from DELIVERY to
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Faulty temperature control.
RETURN to determine if TCU
controls the set point fluid
temperature.
Unit does not heat
Loss of fluid in process.
Check all lines/
properly/cannot
connections/fittings.
achieve set point.
BLOW-OFF valve open.
Close BLOW-OFF valve.
On units with cooling heat
exchangers, switch to
Faulty/dirty solenoid valve.
Manual Cool several times
Usually detected when there
to flush valve. If the leak
is a steady stream or trickle
continues, disconnect the
out of the drain line
power to the unit, tum off the
water supply, and clean or
replace the solenoid.
Degraded fluid .
Drain and replace fluid.
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TOH True Temp™ Series Hot Oil Temperature Control Units
Page 57
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