Sterlco Midsize - Manual (Page 33)

Portable Hot Oil Temperature Control Units Page 33
Vent Solenoid Indicator Light
The Vent Solenoid indicator illuminates when the venting solenoid energizes during
venting sequences.
Mode Indicator Lights
Select the unit operating mode by using the selection switch.
Power On Mode Indicator Light
The Power On mode indicator light illuminates to indicate that the control circuit is
energized in the unit.
Auto Mode Indicator Light
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 Auto light is off and the Cool Solenoid indicator light is illuminated, the controller is
disabled and the cooling solenoid is open, permitting maximum cooling.
If the Auto and Cool Solenoid indicator lights are off, the unit is in standby.
Fault Indicator Lights
Pump Overload Indicator Light
The Pump Overload indicator light illuminates when the pump is 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!
Low Pressure Indicator Light
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!
Safety Thermo Indicator Light
The Safety Thermo indicator light illuminates when the unit is 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.
Always correct this alarm condition before returning to normal operation!
High Level Indicator Light (Optional)
The High Level indicator light illuminates when the heat transfer fluid level in the reservoir
tank is too high. Carefully remove just enough fluid so this indicator light shuts off.