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Troubleshooting Guide
Raychem-IM-H58067-IceStopRoofGutterDeIcing-EN 18/01
Symptom
Corrective Action
A. Circuit breaker trips.
Circuit breaker undersized.
Circuit length too long.
Start-up temperature below
design temperature.
Resize the circuit breakers and feed wiring per
Roof and
Gutter De-Icing: IceStop System Design Guide
(H56070).
Defective circuit breaker.
Replace circuit breaker.
Connections or splices may be
shorting out. Physical damage
to the heating cable.
To confirm that heating cable is damaged, test the insulation
resistance according to the procedures described in “Test
Methods.”
Locate and repair incorrect connections or splices.
Locates and remove damaged sections of heating cable.
To locate shorting problems, follow these steps:
1. Visually inspect the power connection, splices, and end
seals for proper installation.
2. Check for visual indications of damage to the cable, espe-
cially in any area where there may have been maintenance
work.
3. Look for damage at entrances to downspouts, around
eaves, and at transitions from roof and gutter.
4. If at this point you have not located the problem, you will
need to begin isolating sections of the heating cable to find
the general area of damage. (For example, cut the circuit
in half and, using a megohmmeter, test both halves to find
the damaged section.) Then remove the damaged section
of heating cable.
Bus wires in contact with each
other.
Cut off the end seal. Re-cut the cable end and install a new
end seal.
Excessive moisture in connec-
tion boxes or splices.
Dry out and reseal connections and splices. Test with a meg-
ohmmeter per installation instructions.
Nick or cut in heating cable or
power feed wire with moisture
present.
Locate and replace damaged power feed wire.
Using 5 mA ground-fault
interruptor instead of 30 mA
ground-fault protection device.
Replace circuit breaker with 30 mA ground-fault protection
device. See GFEPD Selection Guide (H55476) for information
on different breakers.