APPENDIX B : COMPRESSOR DRIVEN AIRDRYER
20950 Issue 1 April 98 B--21
FAULT ACTIONPOSSIBLE CAUSE
Air flow too low. Regulator not at
2bar.
Set regulator to 2bar and
lock knob.
Needle valve not set
correctly.
Set to airflow of 2.0--2.2
ltrs/min.
Compressor faulty. Check compressor motor,
piston seal and valve
plates.
PRV not set
correctly or leaking.
Check PRV set to 4bar
and not leaking.
PCB LK2 in test
position.
Set PCB LK2 to normal.
Airflow too high. Regulator set above
2bar.
Set regulator to 2bar and
lock knob.
Needle valve not set
correctly.
Set to airflow of 2.0--2.2
ltrs/min.
Inline orifice
blocked.
Check airflow from
humidity sensor tube is
1.0 ltrs/min approx.