Thermon TraceNet TCM 18 - Manual (Page 24)

INVALID HI
TEMP ALRM This warning message appears when the values that
have been programmed into the high temperature
alarm and trip settings are in conflict with maintain tem-
perature and control band. Refer to Appendix A for de-
tails on the limitations on what high temperature alarm
and trip values can be programmed into the TCM18 for
a heat tracing circuit.
INVALID LO
TEMP ALRM This warning message appears when the values that
have been programmed into the alarm settings for low
temperature are in conflict with the maintain temper-
ature. Refer to Appendix A for details on the limita-
tions on what low temperature alarm values can be pro-
grammed into the TCM18 for a heat tracing circuit.
In addition to the individual heat tracing circuit ALARM or TRIP message on the
display screen, the “ALARM”, and /or the “TRIP” LED(s) will also begin to flash on
the TCM18 front panel as shown in Figure 10. These LED indicators will activate if
there are any alarm or trip events recorded on the TCM18 control module. These
LEDS will not stop flashing until all conditions have been acknowledged. Once all
are acknowledged, the appropriate LED will cease to flash but will remain energized
until the condition has actually cleared. These LEDS are also an indication that the
three output relays (on the rear of the TCM18 control module) that have been wired
to the DCS or other smart monitoring device or to alarm indicating lights or horn are
activated.
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