40
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:
Power output is zero or incorrect
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
C symptom:
Power output appears correct but pipe temperature is below design
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