Thermolator TW Series
UGH025-0504
6-12
T
ROUBLESHOOTING
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
The cooling valve is stuck
open.
The heater failed.
The thermocouple is
loose.
The thermocouple failed.
The thermocouple is
loose.
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,
Section 6.
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, Section 6.
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, Section 6.
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, Section 6.
SAF
Lo
Err
Pbr
The Thermolator has detected a problem that could lead to equip-
ment damage or personal injury if it is not corrected.
u
The Alarm LED lights and the STOP/RUN LED flashes red.
u
The Thermolator automatically shuts down.
u
The control displays a red LED or alarm code indicating the
source of the problem.
Err
PbS
TW-1, TW-2
C
ONTROL
S
HUT
D
OWN
A
LARMS
Summary of Contents for Thermolator TW
Page 68: ...Thermolator TW Series UGH025 0504 5 16 MAINTENANCE...
Page 102: ...Thermolator TW Series UGH025 0504 6 34 TROUBLESHOOTING...
Page 105: ...UGH025 0504 Thermolator TW Series APPENDIX B 1 PUMP CURVES...
Page 106: ......
Page 108: ......
Page 114: ...TW 1 CIRCUIT BOARD UGH025 0504 PD 2...
Page 115: ...UGH025 0504 TW 2 CIRCUIT BOARD PD 3...
Page 116: ......