Quincy Compressor QSI Series, Instruction Manual

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Section IX - Troubleshooting
Probable Causes: Corrective Action:
114
Quincy Compressor-QSI
®
High Receiver Pressure:
Air pressure switch not set correctly
Inlet valve not closing at lower air demand
Blowdown valve not relieving receiver pres -
sure
Clean air filter element or replace with new
element.
Check service lines for leaks with soap suds.
Repair as necessary.
Check for build up or gumming of shaft.
Check fluid filter for plugging.
Reevaluate air demand. Install additional
compressors as needed.
Check service lines for leaks with soap suds.
Repair as necessary.
Correct in accordance with the instructions
in “Inlet valve not opening or closing in rela -
tion to air demand” section of troubleshoot -
ing guide.
Replace air filter element.
Adjust differential pilot valve to achieve
desired modulation range.
Adjust air pressure switch to achieve desired
cut-in and cut-out pressure.
Check and replace as necessary.
High Discharge Air Temperature and/or High Fluid Injection Temperature:
Not enough cooling water flowing through
cooler (water-cooled models only)
Inadequate circulation of cooling air at the
cooler (air-cooled models only)
Low fluid level in reservoir
Cabinet panels removed
Cooler plugged
Fluid filter plugged