Thermon TraceNet TCM 18 Manual do Utilizador descarregar pdf (Página 73)

Circuit Fault Alarm

The following summarizes some of the possible causes and solutions for heat trac-

ing circuit fault alarms.

Cause Possible Solutions

Upon initial installation start-up, improper

wiring of the relay or low current in heater.

Conﬁrm correct wiring and presence of

the heater. Where normal operating am-

perage is in range of 0 to 250mA, dis-

abling the Self-Test function or adding

multiple loops through the current sensing

toroid may be required.

During daily operations; possibly indicates

relay contact failure.

If relay has failed, replace.

Breaker off. Turn on breaker after conferring with op-

erations manager.

High Current Readings/Alarms

The following summarizes some of the possible causes and solutions for heat trac-

ing high current readings or alarms.

Cause Possible Solutions

Self regulating heater or power limiting

heater current may exceed set value dur-

ing normal operation or start-up opera-

tions.

Increase high current alarm set point

(if approved by project engineer). For

startup operation current alarm nui-

sances, it may also be desirable to in-

crease the delay time (before a current

reading is done after turn on) set in the

controller.

69 PN 50316_0514

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Thermon TraceNet TCM 18 Manual do Utilizador Página 73