Specifications

Thermolator TW-1 and TW-2 UGH015/0100
6-6 TROUBLESHOOTING
Alarm
Actual temperature
of water supplied to
the process is below
the programmed
20° F safety limit.
The thermocouple
in the process
return line failed.
The thermocouple
in the process
supply line failed.
Possible cause
Is the cooling valve stuck
open?
Has the heater failed?
Is the thermocouple
loose?
Has the thermocouple
failed?
Is the thermocouple
loose?
Has the thermocouple
failed?
Solution
Disassemble the cooling valve
and check for particles block-
ing the valve seat. Check the
valve seat for excessive wear.
Replace parts as required using
a valve repair kit. See
Repairing Solenoid Valves.
Check for a bad heating
element, or a heater contactor
that failed in the open position.
See Replacing the Heater
Contactor and Replacing
Heater Elements.
Check for a loose thermocou-
ple or loose wire connections
to the thermocouple.
Check the thermocouple and
replace if necessary. See
Checking and Replacing
Thermocouples.
Check for a loose thermocou-
ple or loose wire connections
to the thermocouple.
Check the thermocouple and
replace if necessary. See
Checking and Replacing
Thermocouples.
SAF
Lo
Err
Pbr
SHUT 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.
Err
PbS