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Thermistor Check Mode
Thermistor Check mode
• After the tank is filled and both isolation and hot water valve are off the water temperature in the hot water tank is
monitored by 2 thermistors.
• The control checks the readings of the two thermistors in the hot water tank.
• If the 2 thermistors are valid the UI will display the ‘Hot Water’ screen and goes to the Standby Mode.
• If either of the 2 thermistors are not valid it will display ‘HOT WATER CANCELLED’ screen on the UI for 3 sec. set an error
code then go the HOME screen.
• After temperature is selected the control then monitors both thermistors looking for them to be within 10˚ F within the
first 30 seconds of heating.
• For the remainder of the heating time the control continues to monitor the temp ensuring the difference remains less
than 10˚ F.
Red Knob LED on
Red Knob LED off
The 2 thermistors
values are valid
Red Knob LED off
The 2 thermistors
values are invalid
Red Knob LED off
After 3 seconds
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