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Circuit Fault Alarm
The following summarizes some of the possible causes and solutions for heat tracing
circuit fault alarms.
Cause
Possible Solutions
Upon initial installation start-up, improper
wiring of the relay or low current in heater.
Confirm correct wiring and presence
of the heater. Where normal
operating amperage is in range of 0
to 250mA, disabling the Self-Test
function or adding multiple loops
through the current sensing toroid
may be required.
During daily operations; possibly indicates
relay contact failure.
If relay has failed, replace.
Breaker off. Turn
on
breaker after conferring with
operations manager.
High Current Readings/Alarms
The following summarizes some of the possible causes and solutions for heat tracing
high current readings or alarms.
Cause
Possible Solutions
Self-regulating heater or power limiting
heater current may exceed set value during
normal operation or start-up operations.
Increase high current alarm set point
(if approved by project engineer).
For startup operation current alarm
nuisances, it may also be desirable to
increase the delay time (before a
current reading is done after turn on)
set in the controller.
Self-regulating or power limiting heater may
be operating at cooler than design pipe
temperatures due to processing conditions
and thus heaters may be drawing higher
current values.
Increase high current alarm set point
(if approved by project engineer).
