Specifications

UGH015/0100 Thermolator TW-1 and TW-2
TROUBLESHOOTING 6-5
Alarm
The actual tempera-
ture of water
supplied to the
process exceeds the
260° F safety switch
limit.
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.
The actual tempera-
ture of water
supplied to the
process exceeds the
programmed 260° F
safety limit.
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.
Possible cause
Has water stopped flow-
ing through the unit or
between the supply outlet
and return inlet?
Is the optional electro-
mechanical safety switch
improperly set or
defective?
Has the heater contactor
failed?
Has water stopped flow-
ing through the unit or
between the supply outlet
and return inlet?
Has the heater contactor
failed?
Solution
❒ Verify that the unit is run-
ning and that the pump is
working.
❒ Check for closed or defec-
tive cooling or vent valves
and plugged lines. See
Repairing Solenoid Valves.
Check the switch setting. A
too-low setting will cause
nuisance trips. Check the
switch and replace if defective.
See Checking and Replacing
Switches.
Replace the contactor if
defective. See Replacing
the Heater Contactor.
❒ Verify that the unit is run-
ning and that the pump is
working.
❒ Check for closed or defec-
tive cooling or vent valves
and plugged lines. See
Repairing Solenoid Valves.
Replace the contactor if
defective. See Replacing
the Heater Contactor.
High Temp. Safety
S
HUT DOWN
ALARMS
The Thermolator has detected a problem that could lead to equip-
ment damage or personal injury if it is not corrected.
◆ The Alarm LED lights and the STOP/RUN LED flashes red.
◆ The Thermolator automatically shuts down.
◆ The control displays a red LED or alarm code indicating the
source of the problem.
SAF
Hi