Slant/Fin EM-10 Service Manual - Manual (Page 34)

34 EM-40-SM Service Manual
Error Messages (2 of 2)
OUTDOOR SENSOR OPEN CIRCUIT
The control is no longer able to read the outdoor sensor due to an open circuit. In this case
the control assumes an outdoor temperature of 32°F (0°C) and continues operation.
Test the outdoor sensor and related wiring. The error message will clear once the error
condition is corrected and a button is pressed.
DHW TANK SENSOR SHORT CIRCUIT
The control is no longer able to read the DHW tank sensor due to a short circuit. In this
case, the control will not operate the boiler.
Test the DHW tank sensor and related wiring. The error message will clear once the error
condition is corrected and a button is pressed.
DHW TANK SENSOR OPEN CIRCUIT
The control is no longer able to read the DHW tank sensor due to an open circuit. In this
case, the control will not operate the boiler.
Test the DHW tank sensor and related wiring. The error message will clear once the error
condition is corrected and a button is pressed.
RELOAD FACTORY DEFAULTS
To reload FACTORY DEFAULT SETTINGS, press and hold the outside
buttons (Item and Down) while powering the control up. This will reload
the FACTORY DEFAULTS.