WarmlyYours TempZone Floor Heating Cable (Twin) - Manual (Page 27)

8.2.2 Electrical Fault Finding
If the system is not functioning properly, turn off the system and have a licensed, certified electrician perform the
following:
• Complete all steps of the installation process.
• Verify that all wiring connections, including grounding of the system, are correct.
• Check the sensor wire for proper ohm reading.
• Ensure all wires have been connected, including grounding of the system, in accordance with the wiring diagrams.
• Verify that the breaker supplying power to the WarmlyYours thermostat is a non-GFCI circuit breaker (Note: If using a
thermostat not provided by WarmlyYours, a GFCI-circuit breaker may be required).
• Make sure multiple cables have been wired in parallel and not in series.
• Confirm that the thermostat is receiving the correct voltage and outputting the same voltage when
calling for heat.
• Using a well-calibrated, digital ohmmeter or PowerMan™ with good batteries, check the ohm resistance level of each
heating cable. Refer to sections 5.2.10 and 5.3 for instructions about how to attach the ohmmeter or PowerMan™
and how to use the PowerMan™. Verify that these values are within -5%/+10% at 20ºC (68ºF) of the resistance
value listed on the product label. If the measured values exceed the acceptable range, refer to the “Quick Reference
Troubleshooting Guide” in section 8.1. If the measured value is not within range of the original reading, the cable may
have been damaged in some way during installation.
If all of the above items have been completed and the system is still not operating correctly, then determine if there is a
break or a short under the floor.
8.2.3 Checking for Breaks or Shorts
To check for a break, measure the ohm resistance of each cable. When taking an ohm reading, ensure that you do the
following:
• Do not touch either of the probe ends with any part of your body. If the probe end is in contact with the body, the meter
will measure the internal resistance of your body, not the cable.
• Set ohmmeter to the proper scale (0 to 200 Ω for heating cable or 0 to 20,000 Ω for the sensor wire).
The ohm resistance readings should be within -5/+10% at 20ºC (68ºF) of the nominal resistance indicated by the factory
on the UL label. Refer to the “Quick Reference Troubleshooting Guide” in section 8.1. to determine what the ohm readings
indicate.
Troubleshooting SECTION 8
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