Manual 2100-694B
Page
51 of 62
8612-064 Dust (Particulate) Sensor Control Board
8612-064 Control Board Output Signal Not Responsive
1. With a voltmeter, verify 24VAC present across
24VAC pin terminals.
A. If 24VAC is not present, trace back wires to
source.
2. Inspect and re-seat the dust sensor communication
cable.
A. Carefully remove the dust sensor
communication cable from the dust sensor
connector on the dust sensor alarm board and
the dust sensor.
B. Inspect communication cable for the following:
i. Wires pulled out of the connectors.
ii. Scars in insulation exposing bare wire.
C. If communication cable is damaged:
i. Replace communication cable.
D. If communication cable is not damaged:
i. Carefully reconnect the dust sensor
communication cable to the dust sensor
connector on the dust sensor alarm board
and the dust sensor.
FIGURE 64
8612-061 Dust Sensor Alarm Board