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24 Direct-Fired Indoor and Outdoor Units • MUA-SVP01A-EN
Functions
Unit Resets
This section should assist the user in resetting alarms and cycle counters which
have been displayed on the BACview.
ALARM. To reset an alarm scroll through the menu tree, locate the Unit Resets
branch and select Alarm. Press the Enter key. The word OFF should flash. Now
press the INC key and the word ON should flash on the display. Press the Enter
key again and ON should stop flashing. Repeat this process so the word OFF is
displayed and not flashing. The alarm has now been cleared and the Alarm RS
function has been rearmed.
CALIBRATE. The Calibrate function forces the controller to recalibrate the return
air flow station. The recalibration will occur immediately if the fan is running or at
the next fan start. To recalibrate scroll through the menu tree, locate the Unit
Resets branch and select Calibrate. Press the Enter key. The word OFF should
flash. Now press the INC key and the word ON should flash on the display. Press
the Enter key again and ON should stop flashing. Repeat this process so the word
OFF is displayed and not flashing. The calibration has now been initiated and the
Calibration function has been rearmed.
FAN COUNT. Fan Count records each fan start. To reset a fan count scroll through
the menu tree, locate the Unit Resets branch and select Fan Count. Press the
Enter key. The word OFF should flash. Now press the INC key and the word ON
should flash on the display. Press the Enter key again and ON should stop
flashing. Repeat this process so the word OFF is displayed and not flashing. The
fan count has now been cleared and the Fan Count function has been rearmed.
HEATING COUNT. Heating Count records each burner start. To reset a heating
count scroll through the menu tree, locate the Unit Resets branch and select
Heating Count. Press the Enter key. The word OFF should flash. Now press the
INC key and the word ON should flash on the display. Press the Enter key again
and ON should stop flashing. Repeat this process so the word OFF is displayed
and not flashing. The heating count has now been cleared and the Heating Count
function has been rearmed.
COOLING COUNT. Cooling Count records each cooling start. To reset a cooling
count scroll through the menu tree, locate the Unit Resets branch and select
Cooling Count. Press the Enter key. The word OFF should flash. Now press the
INC key and the word ON should flash on the display. Press the Enter key again
and ON should stop flashing. Repeat this process so the word OFF is displayed
and not flashing. The cooling count has now been cleared and the Cooling Count
function has been rearmed.
Multiplexed Inputs
DDC controllers are designed with a finite number of inputs and outputs.
Multiplexing expands the functionality of the controller by allowing multiple
devices to effectively share the same input. This is usually accomplished by
connecting resistors, either in a series or parallel configuration, to an analog