Conair Thermolator TW-1 User Manual page 76

TW C
ONTROL
A
LARMS
Alarm
PAL
The cooling water
pressure is less than
25 psi.
Note: The unit will
re-start automatically
after a two-second
delay if the water
pressure returns to at
least 25 psi.
OL
The pump motor
overload has
tripped. The con-
tact is open.
WARNING:
Only qualified electri-
cal service personnel
should examine and
correct problems that
require opening the
unit's electrical
enclosure or checking
electrical current to
diagnose the cause of
a problem.
6-8
T
ROUBLESHOOTING
The Thermolator has detected a problem that could lead to equip-
ment damage or personal injury if it is not corrected.
u The controller displays a red alarm LED and/or an error code
indicating the cause of the problem.
Cause
Low
The water supply pres-
Water
sure is below 25 psi.
Pressure
The pressure switch
failed.
The cooling valve failed.
The incorrect voltage is
supplied to the pump
motor.
The required water flow
is greater than the
pump's capacity.
The motor overload is
faulty or set incorrectly.
The pump is not working
properly.
Thermolator TW Series
Solution
Verify that the water supply is
on and delivering water at a
pressure of at least 25 psi.
Check for closed valve or faulty
pump in the supply circuit.
Watch gauges while turning
cooling water on and off. If
pressure vents automatically,
check vent or cooling valve.
Check the thermocouple and
replace if necessary. See
Repairing Solenoid Valves or
Motorized Cooling Valves,
Section 6.
Supply voltage should match
the rating on the pump name
plate. If voltage is correct,
check wiring connections.
r Review pump sizing for the
application.
r Decrease the process water
flow.
Disconnect the power and open
the electrical enclosure. Verify
that the overload is set to trip at
the proper amperage, which
should not exceed the FLA.
Manually trip and reset the
overload. If the problem contin-
ues, replace the overload. See
Resetting and Replacing
Overloads, Section 6.
Replace the pump if supply
voltage, wiring and overload
settings are correct, but the
pump continues to draw exces-
sive current.
UGH025-0504