PAGE 17
MAINTENANCE
CHECK THE NON-RETURN
VALVE (EVERY 6 MONTHS)
If the reservoir pressure
decreases for no apparent
reason, it is possible that the
non-return valve is leaking.
To check:
1. Make sure that the reservoir
is not under pressure and the
compressor is switched OFF.
2. Examine the non-return
valve, and replace the gasket
and valve if necessary.
