York Millennium YK M3 M3 G4 THRU YK S6 S4 J2 User Manual
Page 48
48
YORK INTERNATIONAL
TABLE 2 – OPERATING ANALYSIS CHART (Continued)
RESULTS
POSSIBLE CAUSE
REMEDY
6. SYMPTOM: USUALLY HIGH OIL PRESSURE DEVELOPS WHEN OIL PUMP RUNS
Unusually high oil pressure is displayed
High oil pressure. Trans-
Replace low or high oil pressure
when the oil pressure display key is
ducer defective. Relief
transducer. Adjust external relief
pressed when the oil pump is running.
valve is misadjusted.
valve.
7. SYMPTOM: OIL PUMP VIBRATES OR IS NOISY
Oil pump vibrates or is extremely noisy
Misalignment of pump or
Correct condition or replace faulty
with some oil pressure when pressing
Mounting bolts loose.
part.
OIL PRESSURE display key.
Bent shaft.
Worn pump parts.
NOTE:
When oil pump is run without
Oil not reaching pump
Check oil supply and oil piping.
an oil supply it will vibrate and
suction inlet in sufficient
become extremely noisy.
quantity.
8. SYMPTOM: OIL PRESSURE GRADUALLY DECREASES (Noted by Observation of Daily Log Sheets)
Oil pressure (noted when pressing OIL
Oil filter is dirty.
Change oil filter.
PRESSURE display key) drops to 70%
of oil pressure when compressor was
Extreme bearing wear.
Inspect compressor.
originally started.
9. SYMPTOM: OIL PRESSURE SYSTEM CEASES TO RETURN AN OIL/REFRIGERANT SAMPLE
Oil refrigerant return not functioning.
Filter-drier in oil return
Replace old filter-drier with new.
system dirty.
Jet or orifice of oil return
Remove jet, inspect for dirt. Remove
jet clogged.
dirt using solvent and replace.
10. SYMPTOM: OIL PUMP FAILS TO DELIVER OIL PRESSURE
No oil pressure registers when pressing
Faulty oil pressure
Replace oil pressure transducer.
OIL PRESSURE display key when oil
transducer
pump runs.
Faulty wiring/connectors.
11. SYMPTOM: REDUCED OIL PUMP CAPACITY
Oil pump pumping capacity.
Excessive end clearance
Inspect and replace worn parts.
pump.
Other worn pump parts.
Partially blocked oil supply
Check oil inlet for blockage.
inlet.