JOHNSON CONTROLS
24
FORM 160.76-O1
ISSUE DATE: 6/15/2015
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
sufficient 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
increases to 55 + hz to maintain target
oil pressure.
Oil filter is dirty.
Change oil filter.
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 filter-drier with new.
Jet or orifice 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)
