York MaxE YK, Operating And Maintenance, Page: 24 / 36

YORK INTERNATIONAL
FORM 160.73-O2 (605)
24
TABLE 1 – OPERATION ANALYSIS CHART (CONTINUED)
RESULTS POSSIBLE CAUSE REMEDY
5. SYMPTOM: UNUSUALLY 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. transducer.
pressed when the oil pump is running.
6. SYMPTOM: OIL PUMP VIBRATES OR IS NOISY
Oil pump vibrates or is extremely noisy Oil not reaching pump Check oil level.
with some oil pressure when pressing suction inlet in suffi cient
OIL PRESSURE display key. quan ti ty.
When oil pump is run
without an oil supply it
Worn or failed oil pump. Repair/Replace oil pump.
will vibrate and
become extremely noisy.
7. 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.
8. SYMPTOM: OIL PRESSURE GRADUALLY DECREASES
(Noted by Observation of Daily Log Sheets)
When oil pump VSD frequency increases Oil fi lter is dirty. Change oil fi lter.
to 55 + hz to maintain target oil pressure.
9. SYMPTOM: OIL PRESSURE SYSTEM CEASES TO RETURN AN OIL/REFRIGERANT SAMPLE
Oil refrigerant return not functioning. Filter-drier in oil return Replace old fi lter-drier with new.
system dirty.
Jet or orifi ce 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.
Troubleshooting