035-19569-101 (0109)
8-2
GB
Fault Possible Cause Remedy
5. SYMPTOM: Unusually High Oil Pressure develops when Oil Pump Runs
Unusually high oil pressure is
displayed when the oil pressure
display key is pressed when the oil
pump is running.
High oil pressure. Transducer
defective.
Replace low or high oil pressure
transducer.
6. SYMPTOM: Oil Pump Vibrates or is Noisy
Oil pump vibrates or is extremely
noisy with some oil pressure when
pressing OIL PRESSURE display
key.
Note: When oil pump is run
without an oil supply it will
vibrate and become extremely
noisy.
Oil not reaching pump suction inlet
in suffi cient quantity.
Check oil supply and oil piping.
Worn or failed oil pump. Repair/Replace oil pump.
7. SYMPTOM: Reduced Oil Pump Capacity
Oil pump pumping capacity. Excessive end clearance on pump.
Other worn pump parts.
Inspect and replace worn parts.
Partially blocked oil supply inlet. Check oil inlet for blockage.
8. SYMPTOM: Oil Pressure Gradually Decreases (Noted by Observation of Daily Log Sheets)
When oil pump VSD frequency
increases to 55 + hz to maintain
target oil pressure.
Oil fi lter is dirty. Change oil fi lter.
9. SYMPTOM: Oil Pressure System Ceases to return an Oil/Refrigerant Sample
Oil refrigerant return not
functioning.
Filter-drier in oil return system dirty. Replace old fi lter-drier with new.
Jet or orifi ce of oil return jet
clogged.
Remove jet, inspect for dirt.
Remove dirt using solvent and
replace.
10. SYMPTOM: Oil Pump Fails to deliver Oil Pressure
No oil pressure registers when
pressing OIL PRESSURE display
key when oil pump runs
Faulty oil pressure transducer.
Faulty wiring/connectors.
Replace oil pressure transducer.
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