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C
symptom:
probable Causes
1
Wet or missing insulation with proper weather-proofing
2
Insufficient heating cable on valves, maintain
temperature at flanges, supports, pumps, and other
heat sinks
3
Temperature controller set incorrectly
4
Improper thermal design used
5
Temperature sensor in wrong location
6
Low fluid temperature entering pipe
D
symptom:
probable Causes
1
No input voltage
2
Temperature controller wired in the normally open
(N.O.) position
3
Limiter has tripped
4
Broken or damaged heating element, hot-cold joint,
end cap, or broken tail
5
Wrong cable used
6
Improper voltage used
Locate faults by the following steps:
1 Visually inspect the power connections, splices and
2 Look for signs of damage at:
end seals for correct installation
a) Valves, pumps, flanges and supports
b) Areas where repairs or maintenance work has been carried
out recently
40
Power output appears correct but pipe temperature
Power output is zero or incorrect
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