AEC TDH-6 Series Operation And Installation Manual page 36

FROM PROCESS Indicator
T Indicator
FLOW Indicator
Alarm Indicators
FLUID PRESSURE Indicator
SAFETY THERMO Indicator
HI/LO ALARM Indicator
PROBE FAIL Indicator
Page 36
The FROM PROCESS
screen on the controller displays the temperature of the incoming
fluid.
T
The indicator is on when the
controller displays the difference in temperature between outgoing
Delivery fluid and incoming Return fluid.
The indicator is on when the
FLOW
controller displays the flow of fluid in liters per minute; this
function requires the optional flow sensor.
The
FLUID PRESSURE
low. The TCU shuts down and resumes operation only when a
proper level of fluid pressure is restored.
The SAFETY THERMO
condition occurs. The heater outputs are then disabled, the pump
continues to operate, and the
fatal fault condition, requiring that main power be disconnected
to reset the standard controller.
The HI/LO ALARM indicator is on when an individually-set alarm
condition occurs. The
the set point. The LO
set point. Alarms reset automatically.
The PROBE FAIL indicator is on when a temperature sensing
probe fails. A delivery probe failure displays
and a return probe failure displays
resets after the failed probe is replaced.
TDH-6 Series Hot Oil Large Temperature Control Units
indicator is on when the
PROCESS
PROCESS
indicator goes on when fluid pressure is
indicator is on when an over-temperature
solenoid energizes. This is a
COOL
HI deviation is +200ºF (about +93ºC) above
deviation is -100ºF (about -37ºC) below the
RET
on the screen. The alarm
PROCESS LED
LED screen on the
LED screen on the
DEL
on the screen,