Install Instructions

19
Troubleshooting
Problem Possible Cause Solution
Mat/cable resistance
measurement is outside
the range printed on
the nameplate label.
An analog ohmmeter
(using a moving needle)
was used to take the
reading.
Obtain a digital ohmmeter (multi-meter) able to read 0 to 20,000
ohms (Ω) and re-measure the resistance.
If measurement shows
an open or short circuit,
the heating cable has
been damaged.
Record resistances between all power lead wires and contact the
manufacturer.
If measurement is just
a little low or high,
air temperature has
affected the resistance.
Place the mat/cable in a room 65-75 °F and re-measure after an
hour.
The resistance
measurement could be
from more than one
mat/cable.
Disconnect all cables/mats from each other and from controls
and re-measure.
The ohmmeter
(multimeter) is set to the
wrong scale.
If the ohmmeter (multi-meter) has multiple ranges (e.g. 200Ω,
2kΩ, 20kΩ, 200kΩ, 20MΩ) set the range to 200Ω and re-measure.
Snow/ice is not melting. Mat/cable has been
damaged.
Measure mat/cable resistances between all power lead wires
as shown in Phase 3 of this manual. If there is an open or
short-circuit damage, record these resistances and contact the
manufacturer.
GFCI has tripped. Try resetting the GFCI on the circuit breaker ONCE. If it trips
again, do not continue to try resetting it. Check for loose wire
connections in the breaker panel, junction boxes, controls,
etc. Measure mat/cable resistances between all power lead
wires as shown in Phase 3 of this manual. If there is an open or
short-circuit damage, record these resistances and contact the
manufacturer.
Incorrect voltage
applied.
Briefly energize the system and use a multi-meter to measure
the voltage between power lead wires of the mat/cable. Check
voltage ratings for each control and cable to make sure they
match. If possible, use an “amp clamp” meter to measure the
current into each mat/cable.
Mats/cables are
connected in series.
Multiple mats/cables must be connected in “parallel”.
System operates
continuously.
Incorrect wiring. Control
was “bypassed”.
Check wire connections. See wire instructions with control and
in this manual.
Faulty control. Relay is
not opening properly.
Check instructions with the control.
If not qualified to perform electrical installations, it is strongly recommended that a qualified, licensed
electrician be hired to install the heating cables and related electrical components. If problems with the system
arise, please consult the troubleshooting guide below. Any troubleshooting work should be done with the
power removed from the circuit, unless otherwise indicated. Call the factory for further assistance.