Engineering manual - SAB 193-233-283 S A-frame (including ATEX)
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008831 en 2022.02
Compressor block
Symptom
Probable cause
Solution
Excessive noise
and vibration
Main oil injection valve may be
closed.
Open valve.
Main oil injection valve may be
open too far.
Adjust.
Bearing damage or excessive wear. Replace bearings.
Slide valve/slide stop out of calibra-
tion (over or under compression).
Calibrate.
Coupling loose on shaft.
Tighten coupling. Replace if
damaged.
Refrigerant flood back (Liquid
slugging).
Correct system problem.
Capacity slide valve
and/or slide stop
will not move.
Cannot unload/load
or both
Oil pressure is not sufficient.
Check oil pressure.
Solenoid coils may be burned out.
Replace.
Incorrect setting of valves in the hy-
draulic system.
Check according to hydraulic sys-
tem description.
Malfunction of 4-way control valve
of slide components.
Check according to description of
main components.
Table 55: Compressor block