Ec Motor Testing - Data Aire DAPA-2.5 Installation, Operation & Maintenance Manual

EC motors have an under-voltage protection. If the power supply voltage falls below 150 VAC/3Ø (for
230-volt motors) 290 VAC/3Ø (for 460 motors) for a minimum of five (5) seconds, the motor will
automatically switch off and an alarm condition (NO AIRFLOW) will be energized and displayed. If the
power supply voltage returns to the correct values, the motor will automatically restart.

EC Motor Testing

To test the plenum fan modules in manual mode, wire a 9-volt battery across the plug fan control signal
(see schematic for wiring details).
Be certain to disconnect both terminals (+ and -) from the analog output. This will enable the fan control
signal at approximately 90%. The fans will spin at near full speed if the contactors are enabled.
NOTICE: The unit controller (Expanded dap4) has a time delay before the
"No Airflow" alarm is energized. It is adjustable from 5 to 180 seconds (in 5
second increments). On site where a voltage problem is known to exist, the
delay can be adjusted to eliminate "nuisance" alarms until the problem is
corrected.
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