UGH025-0504
Thermolator TW Series
T
ROUBLESHOOTING
6-9
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
Water stopped flowing
through the unit or
between the supply and
return.
The optional electro-
mechanical safety switch
is improperly set or
defective.
The heater contactor has
failed.
Water stopped flowing
through the unit or
between the supply and
return.
The heater contactor
failed.
Solution
r
Verify that the unit is running
and that the pump is work-
ing.
r
Check for closed or defective
cooling or vent valves and
plugged lines.
See Repairing
Solenoid Valves, Section 6.
Check the switch setting. A set-
ting that is too low will cause
nuisance trips. Check the switch
and replace if defective.
See
Checking and Replacing
Switches, Section 6.
Replace the contactor if
defective.
See Replacing the
Heater Contactor, Section 6.
r
Verify that the unit is running
and that the pump is work-
ing.
r
Check for closed or defective
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.
High Temp. Safety
TW-1, TW-2
C
ONTROL
S
HUT
D
OWN
A
LARMS
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.
SAF
Hi
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: ......