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Page 36 6017 Series Hot Oil Large Temperature Control Units
FROM PROCESS Indicator
The FROM PROCESS indicator is on when the PROCESS LED
screen on the controller displays the temperature of the incoming
fluid.
UT Indicator
The UT indicator is on when the PROCESS LED screen on the
controller displays the difference in temperature between outgoing
Delivery fluid and incoming Return fluid.
FLOW Indicator
The FLOW indicator is on when the PROCESS LED screen on the
controller displays the flow of fluid in liters per minute; this
function requires the optional flow sensor.
Alarm Indicators
FLUID PRESSURE Indicator
The FLUID PRESSURE indicator goes on when fluid pressure is
low. The TCU shuts down and resumes operation only when a
proper level of fluid pressure is restored.
SAFETY THERMO Indicator
The SAFETY THERMO indicator is on when an over-temperature
condition occurs. The heater outputs are then disabled, the pump
continues to operate, and the COOL solenoid energizes. This is a
fatal fault condition, requiring that main power be disconnected
to reset the M2B controller.
HI/LO ALARM Indicator
The HI/LO ALARM indicator is on when an individually-set alarm
condition occurs. The HI deviation is +200ºF (about +93ºC) above
the set point. The
LO deviation is -100ºF (about -37ºC) below the
set point. Alarms reset automatically.
PROBE FAIL Indicator
The PROBE FAIL indicator is on when a temperature sensing
probe fails. A delivery probe failure displays
DEL on the screen,
and a return probe failure displays
RET on the screen. The alarm
resets after the failed probe is replaced.