Centrox Instruction Manual
55
AirSep Corporation
8.1.1. PRESSURE SWITCH TROUBLESHOOTING
The pressure switch is located at the bottom of the PSA concentrator module
(Figure 4.4).
If the pressure switch does not work properly, review the following probable
causes:
Probable Cause
Solution
Incorrect electrical
connections.
Check leads to switch. Make sure they are
properly connected.
Faulty control circuit.
Check electrical power supply to switch.
Check for open-circuited or grounded wires
and loose connections at terminal block or
switch.
Incorrect adjustment.
Check high and low adjustments for proper
setting. (See Appendix D — Component
Literature.)
If you can not correct the operation of the pressure switch,replace the entire switch.
8.2
SOLENOID VALVE TROUBLESHOOTING
If a solenoid valve does not energize, review the following probable causes:
Probable Cause
Solution
Defective wire to valve.
Repair or replace wire.
Defective coil.
Replace coil.
Defective valve.
Rebuild or replace valve.
Defective circuit board.
Replace circuit board.
If a solenoid valve stays constantly energized then the circuit board is defective.
Replace the circuit board.
To determine if a solenoid valve, main circuit board, or wire is defective, review the
following:
Solenoid Valves
Set a voltmeter to DC, and carefully connect the leads to the two terminal spades
energized, and 0 when de-energized.
