Circuit Board - AirSep visionaire Service Manual

5. Disconnect the wire connectors labeled AC Power and PowerSw from circuit
6. With adjusting compressor enclosure (alternating pulling out top and bottom),
7. Locate cooling fan at the back of the compressor enclosure. Review of both the
8. Remove fan and foam strip from the fan recess area and disconnect wires at
Cabinet Fan Installation
To install the cabinet fan, follow the steps below:
1. Locate arrow on fan indicating airflow direction. The arrow for airflow must be
2. Install wire connections onto new fan. Depending on the replacement fan version
3. Replace foam strip around housing of new fan. Opening of foam should be
4. Position both foam strip and cabinet fan into fan recess area located at the back of
5. Return compressor compartment to the original position, being careful not to
6. After removing tape from the top of each sieve bed, reconnect and tighten fittings.
7. Reconnect and secure tubing to equalization valve using tie-wraps.
8. Reconnect wire connectors to main circuit board labeled AC Power and
9. Reattach small tubing to the in-line adaptor leading to the sensor located on the
10. Leak test tubing connections and assure fan is rotating properly.

4.7 Circuit Board

The solid-state printed circuit board controls the timing operation of the five solenoid valves, the
alarm system functions, and regulates the voltage to ensure efficient and optimal performance.
board. (If equipped with an O2 oxygen monitor, also disconnect wire connectors
labeled O2 LED and Sensor).
gently remove the compressor enclosure from the center section of unit by sliding
it out through the front.
cooling fan and its wire connection positions should be made prior to fan removal
to allow easier and proper installation of new fan.
proper locations.
It is very important to install the cabinet fan correctly. Reference
to arrow indicating airflow direction must be made. Improper
installation of cabinet fan may result in unit to overheat and
shutdown.
pointing towards the compressor when properly installed.
being installed, wire connections on fan should be positioned either in the top left
or lower right positions when properly installed.
positioned at the upper right corner of fan when installed, and wires from fan
connections routed through same opening of foam at this location.
the compressor enclosure. When properly installed, both foam strip and fan must
be flush with the edge of fan recess area.
pinch any tubing or wires between compressor enclosure and center section of
unit.
(Small tubing from the bottom sieve beds and the unit's power cord should be
located inside and underneath the tubing connected to sieve beds.
PowerSw. (If equipped with an O2 oxygen monitor, also reconnect wire
connections labeled O2 LED and Sensor).
circuit board, secure with tie wrap.
16
MN138-1 Rev J