9.9 Warm suction side of H.P. safety Leaking safety valve Repair/Replace
9.10 Oil consumption too high. Automatic oil return valve from oil Repair or replace/clear
separatoris defective/chocked.
Worn piston rings. Fit new piston rings.
Oil return valve(s) in cylinder jackets Replace
defective.
9.11 Leakage of shaft seal Worn out 'O' rings Replace
Scratch marks on sealing faces Lap the faces up to 2 light bands or
replace sealing faces.
Dirty oil. Change oil, also clean seal assembly
and seal chamber.
Excessive axial thrust. Adjust axial thrust.
Scratch marks on shaft seal areas of Lap shaft on seal area.
crank shaft.
Losing of spring effect Replace springs.
Oil flow inadequate to shaft seal cooling Check oil pump and its piping for block-
ing the oil passage. Adjust recommended
oil pressure on pressure regulator.
9.12 Malfunctioning of loading/unloading a. Solenoid valve not functional well due to:
operation of compressors. 1. Chattering of valve coil, Check continuity of coil and wiring to
solenoid valve.
2. Valve top and bottom seat Repair or place valves seat part.
damaged or blocked.
3. Plunger neoprene seat swelled Replace or cut excessive swelled
excessively portion of neoprene seat.
b. No sufficient actuating pressure to Check oil control lines for blockage and
unloader assembly. repair/replace. Also check hydraulic
time delay system and set right.
c. Capacity control piston 'O' ring and Replace 'O' ring and piston rings.
piston ring worn out.
d. Blockage of control lines. Repair/clean or replace.
9.TROUBLE SHOOTING CHART (CONTD.):
Fault
Cause
Remedy
31
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