LG RCWFH Series Instruction Manual page 137

Problem in lubrication system
Decision
Status
criteria
(Oil dis-
charge
pressure –
Oil pressure is
oil tank
low
pressure)
< 1.3
2
kg/cm
74°C or
Oil temp. is high more dur-
in oil tank ing opera-
tion
Rapid change of
-
oil pressure
Oil tank temp. is Below
low 30°C
Oil in oil tank in-
creased when it -
is stopped
Cause
1. Oil filter clogged
2. Insufficient oil
3. Pressure transducer defect
4. Oil pump defect
1. Oil is not sufficiently supplied to bear-
ing
2. Oil heater setting value defect
3. Refrigerant is not sufficiently supplied
to oil cooler
4. Excessive oil amount
5. Bearing abrasion
1. Oil manometer defect
2. Oil pump cavitation
3. Insufficient oil
1. Oil heater fuse disconnected
2. Oil heater disconnected
3. Black out for long time, power unit
stopped
1. Oil temperature is too low and oil is
dissolved by solvent.
Table 65. Cause and action for problem in lubrication system
Remedy
1. Oil filter cleaning or replacement
2. Recharge oil
3. Change transducer
4. Check if oil supply valves are closed
5. Check if oil temp. is low
1. Adjust oil pressure, and check oil filter,
oil system.
2. Adjust set value
3. Check condensed refrigerant amount
and filter drier.
4. Remove oil to make it adequate
amount
5. Need disassembly and repair
1. Change manometer
2. Apply power to oil heater
3. Recharge oil
1. Replace fuse
2. Replace oil heater
3. Wait until oil tank temperature meets
the specified temperature. And if it
does not rise, contact LG service per-
sonnel.
1. Check whether oil heater is discon-
nected.
2. Make sure the oil heater is on when
the chiller unit shut down for long-
term.
137