| Document type | Service Information Letter |
|---|---|
| Document number | SI0591 |
| Equipment | YK Centrifugal Chiller |
| Brand | YORK |
| File size | 0.6 MB |
Fault codes in this document
YK High Temp Heat Pump
| Code / display | Meaning | Cause | Action | Page |
|---|---|---|---|---|
| Oil Sump Pressure is Too High | Trip. | Discovered on YK High Heat Pump units with auxiliary condensers (U compressors): unit would trip on Oil Sump Pressure is Too High when the leaving evaporator water temperature was greater than 86°F (30°C). | Changes were made in software version Y.OPT.01.10A.308 to the Oil Sump Condenser and Compressor Vent Line Control; a JCI Service programmable setpoint, Compressor Vent LCHLT Threshold (71.6°F – 89.6°F; default 80.6°F), has been added to the Oil Sump Condenser Screen. Software only upgrade kit: YK 331-03601-602, YZ/YZD 331-03601-603. | 2 |
| failed to start with start inhibit | Unit failed to start; start inhibit active. | Discovered on YK High Heat Pump units with auxiliary condensers (U compressors): unit failed to start with start inhibit when the entering evaporator water temperature was greater than 104°F (40°C). | Changes were made in software version Y.OPT.01.10A.308 to the Oil Sump Condenser and Compressor Vent Line Control; a JCI Service programmable setpoint, Compressor Vent LCHLT Threshold (71.6°F – 89.6°F; default 80.6°F), has been added to the Oil Sump Condenser Screen. Software only upgrade kit: YK 331-03601-602, YZ/YZD 331-03601-603. | 2 |
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Manufacturer document, published here as reference material for equipment we supply. The original lives at docs.johnsoncontrols.com. The rights holder may ask us to take it down — we will.