MGF Silent compressors operating
instruction manual
12
FAULT FINDING
PROBLEM PROBABLE
CAUSE
REMEDY
Compressor does not
start, or stops and does
not start again.
Bad connections.
Blown fuse.
Overload cut-out switch has
tripped.
Check all electrical connections.
Clean and tighten as necessary.
Compressor does not
start.
Air receiver charged
Open drain valve to expel air.
Compressor should start again
when pressure reduces to
approx 95 psi.
Compressor does not
reach set pressure and
overheats easily.
Inlet air filter is blocked.
NOTE: It is also possible that
more air is being required than
compressor is capable of
delivering.
Open the compressor and
replace oil filler/air filter plug.
Air leaking from pressure
switch valve when
compressor is not
running.
Faulty non-return valve.
First drain all air completely
from receiver. Clean or replace
the non-return valve.
Air pressure from
regulator does not
adjust.
Diaphragm inside regulator
body is broken.
Replace regulator.
Compressor operating,
but no air from outlet.
Inlet air filter blocked.
Pressure regulator closed.
Drain valve open.
Bleed pipe (from pressure
switch to non-return valve)
broken or disconnected.
Replace oil filler/air filter plug.
Turn regulator clockwise to set
required pressure.
Close drain valve.
Reconnect or replace bleed
pipe.