Tw Control Alarms - Conair Thermolator TW-1 User Manual

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 or an error code indi-
cating the cause of the problem.
u If the optional alarm package is installed, the Fault button will
illuminate and the audible alarm will activate.
Alarm
tAH
The actual tempera-
ture of water supplied
to the process
exceeds the 260°F
safety limit.
WARNING:
Only qualified
electrical 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.
dTA
The Thermolator will
not maintain the
setpoint temperature,
or takes too long to
reach the setpoint
temperature range.
The actual tempera-
ture of water supplied
to the process is
outside the setpoint
deviation alarm band.
UGH025-0504
Possible cause
Water stopped flowing
through the unit or
between the supply outlet
and return inlet.
The heater contactor
failed.
The optional electro-
mechanical high tempera-
ture safety switch been
installed on this unit.
The actual temperature
of the process fluid is
more than 10°F higher
than the setpoint temper-
ature.
The actual temperature
of the process fluid is
more than 10°F lower
than the setpoint temper-
ature.
Thermolator TW Series
TW C
A
LARMS
Solution
r Verify that the unit is run-
ning and that the pump is
working.
r Check for closed or defec-
tive cooling or vent valves
and plugged lines. See
Repairing Solenoid Valves,
Section 6.
Replace the contactor if
defective. See Replacing
the Heater Contactor, Section
6.
Verify the switch setting. A
too-low setting will cause nui-
sance trips. Check the switch
and replace if defective. See
Checking and Replacing
Switches, Section 6.
Follow the troubleshooting
procedures in the table for a
See High Setpoint Deviation,
Section 6 .
Follow the troubleshooting
procedures in the table for a
See Low Setpoint Deviation,
Section 6.
T
ROUBLESHOOTING
ONTROL
6-5