Perform a capacity regulation test to check solenoid sealing and slide movement.
: Maximum startup inlet fluid temperature is 90°F (32°C) , while non-operating limits reach 100°F (38°C) . 2. Maintenance Intervals mcquay hsa screw compressor service manual
Check oil levels before every start. Professional oil analysis and changes are recommended every 4,000 to 8,000 hours or annually. Filter Replacement: Oil Filters: Replace every 2,000 hours. Perform a capacity regulation test to check solenoid
| Symptom | Possible Cause | Manual Reference Section | |--------|----------------|--------------------------| | High oil consumption | Worn gaterotor / oil separator | Section 6.4 | | Low capacity | Slide valve stuck | Section 5.2 | | High discharge temp | Low refrigerant charge / oil cooler issue | Section 4.1 | | Noisy operation | Bearing wear or star wheel damage | Section 7.0 (Teardown) | | Oil foaming | Liquid refrigerant in sump | Section 3.1 (Superheat adjustment) | Maintenance Intervals Check oil levels before every start
: For chillers, condenser water pipes should be cleaned at least once a year using specialized pipe cleaning guns or agents to prevent scale formation, which can increase condensing pressure. Troubleshooting Common Issues Potential Cause & Action Inability to Load/Unload