Trouble Shooting Guide
WARNING: Isolate supply before working on any part of the electrical system.
EN
DE
Probable causes
FR
Electrical fault at:
PL
•
connection lead
•
damaged heating cable
CZ
RU
Protection undersized
NL
Defective protection
SV
NO
Probable causes
FI
Excessive moisture in junction box
Earth fault at:
•
connection
•
damaged heating cable
Leakage current too high:
power cable or heating cable too long
Contactor bouncing
Voltage spikes in power supply network
Defective rcd
Probable causes
Loss of supply current due to over-current
or residual current device operating.
Loss of supply cable continuity
Incorrect setting or operation of system controls
Incorrect contactor sizing or damaged contactor
Probable causes
Incorrect setting or operation of system
controls.
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Problem A : Over-current protection (circuit breaker) trips or blows
Problem B: residual current device trips
Problem C: Ice/snow not melting
Problem D: Ice/snow begins to melt, but system turns off too soon
Correction
Locate and rectify the fault and reset or replace protection.
Re-establish what the current loads are going to be and install new
protection (NB: if protection is replaced, ensure it is compatible
with the supply cable).
Replace
Correction
Dry out and check seal; replace if necessary. Perform an insulation
resistance test.
Locate and rectify the fault and reset or replace rcd.
Correct problem and re-design.
Replace with higher quality contactor
Reset rcd. If condition persists, use clean power supply.
Replace
Correction
Follow procedures outlined in A and B above.
Locate and rectify fault.
Repair system controls or set system controls correctly
Rectify
Correction
Repair system control unit or set system controls correctly.