Specifications

YORK INTERNATIONAL 51
FORM 160.48-O1
TABLE 2 - OPERATING ANALYSIS CHART - CONTINUED
RESULTS POSSIBLE CAUSE REMEDY
6. SYMPTOM: UNUSUALLY HIGH OIL PRESSURE DEVELOPS WHEN OIL PUMP RUNS
Unusually high oil pressure is displayed High oil pressure. Transducer defective. Replace low or high oil pressure transducer.
when the oil pressure display key is Relief valve is misadjsuted. Adjust external relief valve.
pressed when the oil pump is running.
7. SYMPTOM: OIL PUMP VIBRATES OR IS NOISY
Oil pump vibrates or is extremely noisy Misalignment of pump or piping. Correct condition or replace faulty part.
with some oil pressure when pressing Mounting bolts loose.
“Oil Pressure” display key. Bent shaft.
Worn pump parts.
NOTE: When oil pump is run without an Oil not reaching pump suction inlet in Check oil supply and oil piping.
oil supply it will vibrate and sufficient quantity.
become extremely noisy.
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 RETURN SYSTEM CEASES TO RETURN AN OIL/REFRIGERANT SAMPLE
Oil refrigerant return not functioning. Filter-drier in oil return system dirty. Replace oil filter-drier with new.
Jet or office 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 Faulty oil pressure transducer. Replace oil pressure transducer.
Pressure” display key when oil pump runs. Faulty writing/connectors.
11. SYMPTOM: REDUCED OIL PUMP CAPACITY
Oil pump pumping capacity low. Excessive end clearance in pump. Inspect and replace worn parts.
Other worn pump parts.
Partially blocked oil supply inlet. Check oil inlet for blockage.
12. SYMPTOM: IMPROPER PURGE UNIT OPERATION
Purge unit not purging and air is 1. Faulty float switch assembly. Check these components and replace
present in the unit. 2. Faulty three-way oil solenoid valve. where necessary.
3. Faulty exhaust solenoid valve.
4. Faulty pressure transducer.
Purge unit purging air and refrigerant 1. Faulty exhaust solenoid valve. Restore refrigerant liquid cooling supply.
2. Faulty pressure transducer.
3. Lack of cooling.