Mea SMAC 90-H, Owner'S/Operator'S Manual

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Document No
7215-D0006-02 11
intermittent operation, i.e.
safety valve blows off
Minimum pressure valve jams
Check minimum pressure valve for
smooth movement; if necessary,
ensure smooth movement or
replace
Compressor system
continually discharges, low
delivery quantity
Solenoid valve defective Replace solenoid valve
Break in electric supply
line to solenoid valve
Eliminate break
No or insufficient feed
quantity
Intake filter soiled Replace filter insert
Oil shortage Check oil level, top up if necessary
Intake control valve jams
or is incorrectly positioned
Check control valve and control
valve flap, clean bearing and
guides, check stroke, replace if
necessary
Leaks in system Check seal
Control valve does not
open
Compressor system leaky
Check system and seal off if
necessary
Solenoid valve/electrical
system, bypass valve, piston
gasket, and minimum pressure
valve not functioning
Check and replace parts
Control valve does not
control (two-point/step-less)
Pressure switch in system
is set incorrectly
Check setting, adjust and replace if
necessary
Oil escapes during stop
Sealing surfaces in control valve
damaged, spring in control valve
broken
Check and replace parts
Compressor system does
not discharge (discharge
time 100 - 200
seconds, depending on
separator size)
Solenoid valve/electrical
system not functioning
Check and replace parts
Control valve constantly
discharges
Solenoid valve/electrical
system not functioning
Check and replace parts
Oil escapes during
discharging
(oil foam in
air-oil separating element)
Oil type incorrect Change oil
Oil foam forms during stop
Check and replace discharge delay
valve, with a different nozzle
diameter if necessary
Oil level too high Drain off oil
Abnormal noise during
operation
Insufficient lubrication,
loose parts, damage to
drive, transmission,
bearings, or shaft, etc.
Check, if necessary, replace parts
or have them replaced