FORM 160.75-O1 (211)
JOHNSON CONTROLS
26
SECTION 5 - TROUBLESHOOTING
RESULTS POSSIBLE REMEDY
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.
When oil pump is run without
an oil supply it will vibrate
and become extremely noisy.
Oil not reaching pump suction inlet in
sufcient quantity.
Check oil level.
Worn or failed oil pump. Repair/Replace oil pump.
7. SYMPTOM: REDUCED OIL PUMP CAPACITY
Oil pump pumping capacity.
Excessive end clearance 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 in-
creases to 55 + hz to maintain target oil
pressure.
Oil lter is dirty. Change oil 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 lter-drier with new.
Jet or orice 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.
TABLE 1 - OPERATION ANALYSIS CHART (CONT'D)
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