Operation and Installation Manual PBTC-300
21-54C3-7D0002/-
01/2022-EHT-441169
Notice:
Technical data subject to change without notice.
No claims for damage arising from alternations, errors or misprints shall be allowed.
Seite 46 / 49
16 Troubleshooting
Problem
Possible cause
Remedy
Trace heater remains
cold
No power supply
Trace heater bus wires or power wir-
ing not properly connected
Temperature setpoint incorrectly set
at the thermostat module
Check the power wiring for continuity to circuit breaker.
Connect the trace heater and power wiring according to the in-
stallation instructions.
Adjust the thermostat module according to the installation in-
structions.
Automatic
circuit
breaker tripped
Automatic circuit breaker defective
Automatic circuit breaker has wrong
tripping characteristics, e. g. “B” in-
stead of “C”
Nominal circuit breaker size is insuffi-
cient
Maximum heating circuit length has
been exceeded
End seal has not been installed
Short circuit
Moisture inside the connection sys-
tem or end seal
Replace the automatic circuit breaker.
Install an automatic circuit breaker with Type-C tripping character-
istics or contact the factory for Type-B tripping characteristics.
Install an automatic circuit breaker with higher capacity. Observe the
maximum amperage of all components of the trace heating circuit!
Split
the
heating
circuit
into
separate
circuits.
Install the end seal according to the installation instructions.
Identify the cause and remedy the fault (e. g. ensure that trace
heater bus wires are not twisted together).
Dry the components. For junction boxes, be sure that the cable
gland is correctly installed and sealing properly.
Ground fault protec-
tion is disengaged
Trace heater damaged
Moisture
in
the
components
Ground fault protection defective
Replace the trace heater at the point where it is damaged.
Dry the components. For junction boxes, be sure that the cable
gland is correctly installed and sealing properly.
Replace the ground fault protection device(s).
Insulation resistance
too low or fluctuating
Trace heater damaged
Moisture
in
the
components
Arcing due to damaged trace heater
insulation
Arcing due to inadequate stripping
distance between heating element
and grounding braid
Shortcircuit between the grounding
braid and the heating element or the
grounding braid and the pipe
Test leads touching the junction box
Replace the trace heater at the point where it is damaged.
Dry the components. For junction boxes, be sure that the cable
gland is correctly installed and sealing properly
Replace the trace heater at the point where it is damaged.
Check the stripping distance between bus wires/heating element
and grounding braid at all power, splice and end seal connec-
tions to ensure adequate separation.
Check for cut or damaged cable or inadequate stripping length.
Relocate test leads and retest.
Note: High pipe temperature may lower the insulation resistance reading relative to earlier readings on a cold pipe.
Summary of Contents for PBTC-300
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