AEC TDH-6 Series Operation And Installation Manual page 43

Large hot oil temperature control units
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Auto Mode Indicator Light
Fault Indicator Lights
Pump Overload Indicator Light
Low Pressure Indicator Light
Safety Thermo Indicator Light
TDH-6 Series Hot Oil Large Temperature Control Units
The
Auto
mode indicator light indicates that the Auto mode is
active and the controller is monitoring the system and controlling
the process.
If the
light is off and the
Auto
illuminated, the controller is disabled and the cooling solenoid is
open, permitting maximum cooling.
If the
Auto
and
Cool Solenoid
in standby.
The
Pump Overload
overloaded. This is an alarm condition, so the audible alarm
activates to notify you of the pump overload fault, and the unit
shuts down.
Always correct the alarm condition before returning to normal
operation!
The
Low Pressure
indicator light illuminates when the unit has
low heat transfer fluid pressure. This is an alarm condition, so the
audible alarm activates to notify you of the low pressure fault, and
disables controller outputs, permitting the pump to continue to
circulate fluid to avoid damage. If low pressure continues past five
minutes elapsed time, the pump shuts off.
Always correct the alarm condition before returning to normal
operation!
The
Safety Thermo
overheating. This is an alarm condition, so the audible alarm
activates to notify you of the safety thermo fault, and disables
controller outputs, permitting the pump to continue to circulate
fluid to avoid damage.
Cool Solenoid
indicator lights are off, the unit is
indicator light illuminates when the pump is
indicator light illuminates when the unit is
indicator light is
Page 43

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