2202G1JE-DA-M-N_2010.01.
6
Troubleshooting
Reciprocating Compressor M Series
6.1
Troubleshooting
Table
6-6
8. Excessive oil consumption
Features
Causes
Results
Countermeasures
Crankcase tends to
be frosted.
Forming of refrigerant occurs
due to liquid back. Especially
during vacuum operation
Cannot be
operated
Adjust operation.
Pressure equalizer hole of the
crankcase is blocked (opened too
much during vacuum operation).
Or, suction strainer is clogged.
Inspect and clean, or clean the
strainer
Wear on the piston ring
Replace the piston ring
There is no other
error.
Attachment of the piston ring is
inappropriate
Oil hammer
occurs.
Reattach properly
Head cover is
overheated.
Refrigerant oil is burnt out due to
abnormal high pressure.
Carbon is
accumulated.
Lower the discharge pressure
Value on the
ammeter increased
(current
consumption; in
the case when the
refrigerating load
is normal).
Cylinder sleeve is damaged, is
about to be burnt, or score due to
wear on the ring.
Sleeve and
piston are
burnt.
Inspect and adjust or replace
Excessive oil
pressure
Oil pressure is excessive (in the
case when the refrigerant oil
viscosity is normal).
Oil hammer
Adjust
Oil pressure is low. Refrigerant oil viscosity is low
and light.
(Air bubble is mixed in, or rise of
oil temperature.)
Sliding section
is burnt.
Adjust and replace the refrigerant
oil.
Crankcase is
overheated.
Overheat operation (due to high
discharge pressure)
Refrigerant oil
viscosity is low.
Carbon has
adhered.
Replace with the new refrigerant oil
of wich viscosity is normal (lower
the discharge pressure).