Low Delivery Pressure, High Interstage Pressure | Quinny 65040-AB

	Section IX - Troubleshooting


Probable Causes:	Corrective Action:


Thermal Overload Relays Tripping:

LOOSE SIGNAL WIRE FROM OVERLOAD(S)	CHECK SIGNAL WIRE CONNECTIONS.
INCORRECT THERMAL OVERLOAD RELAY	CHECK MOTOR NAMEPLATE AND COMPARE TO OVERLOAD RELAY
SETTING	SETTING SPECIFICATIONS.
LOOSE MOTOR OR STARTER WIRING	CHECK ALL CONNECTIONS FOR TIGHTNESS.
LOW VOLTAGE	CHECK VOLTAGE AND AMPERAGES WHILE OPERATING THE UNIT
	AT FULL LOAD AND FULL PRESSURE. MAXIMUM TOLERANCE
	+10%.
FAULTY MOTOR	CHECK MOTOR STARTER WIRING BEFORE REMOVING MOTOR.
	REMOVE MOTOR AND HAVE TESTED AT AUTHORIZED MOTOR
	MANUFACTURER REPAIR CENTER.


Low Delivery Pressure:

PLUGGED AIR INTAKE FILTER	REPLACE AIR FILTER ELEMENT.
EXCESSIVE DEMAND - EXCEEDS SUPPLY	ADD ADDITIONAL COMPRESSORS AS NEEDED.
EXCESSIVE LEAKS IN SERVICE LINES	LOCATE AND ELIMINATE AIR LEAKS IN SERVICE LINES.
FAULTY LINE PRESSURE TRANSDUCER	CONTACT AN AUTHORIZED QUINCY SERVICE TECHNICIAN.


High Interstage Pressure:

BLOWDOWN VALVE NOT RELIEVING	CHECK CONTROL SOLENOID AND BLOWDOWN VALVE.
PRESSURE
AIR PRESSURE SWITCH NOT SET	READJUST THE AIR PRESSURE SWITCH SO THAT THE UNLOAD
CORRECTLY (OPERATING IN BACK-UP	PRESSURE DOES NOT EXCEED THE MAXIMUM RECOMMENDED
MODE)	OPERATING PRESSURE.

Quincy Compressor® - QSD™	77

Image 79

Quinny 65040-AB manual Low Delivery Pressure, High Interstage Pressure

Contents

QSD Series Page Table of Contents Section V Maintenance or Service Preparation Standard Warranty Dimensional Data air-cooled Dimensional Data water-cooled Section I General Safety Precautions Spare Parts Ordering Information Safety Alert Symbols Section II Description Compression Cycle and Air Flow General Description Water-cooled Cooling SystemLubricating Fluid System Moisture Separator Capacity Control System Electrical System Shutdown Conditions Back-up Control High Discharge Air Temperature Lights IndicatorsSafety Sensors Main Power on Light Section II Description Location Section III InstallationMoving the Unit to the Installation Site Receiving Piping Connections Piping Fit-up Manual Shutoff Valve Guards Electrical Water Quality Water Flow Fan Rotation Fluid Level Stopping the Compressor Normal Operation Section IV Operating ProceduresPrior to Starting Starting the Compressor Pressure Readings Temperature Readings Water-cooledStopping the Compressor Emergency Section V Preparing for Maintenance or Service This page Intentionally Left Blank Fluid Specifications SafetySection VI Servicing Fluid Life Air Filter Input Shaft Seal Preparation for New Seal Installation Airend Sealing System Seal Installation Adjusting Pressure Switch Section VII Service AdjustmentsPressure Switch Pressure Switch Back-up Operating Mode This page Intentionally Left Blank Do not switch modes with power on the compressor Section Viii Power$ync II OperationIntroduction to Power$ync Back-up Mode Operation Continuous Run Multiple Machine Operational ModeAuto Dual Time Delay Single Machine Operational Modes Network Load Delay Time Pressure Settings Connecting Cable to the Power$ync II Circuit Board Network Installation Rocker Switch Settings Network Setup Network Voltage Tests on Power$ync II SystemsUP/DOWN DEADBAND, F1 EDIT, Enter Return Start-up Power-up Displays Section Viii Power$ync II Operation U19 Memory Failure Contact Your Service Representative Compressor in Back-up Mode U19 Data Checksum Error Press F2 to Update Deadband Data Error Press F1 to ClearU19 Data not Initialized Press F2 to Initialize Filter Needs Servicing Please Replace AS Soon AS Possible Compressor is Starting Start-up DisplaysOperational Displays Additional Sensors Compressor is Unloaded Compressor is Unloaded Minutes Left to ShutdownProgrammed Shutdown Press F2 Compressor Settings and Maintenance DisplaysMode and Pressure Displays Compressor Mode of Operation Auto Dual Timed Stop Press F1 Press F1 to change the load and unload pressures Read Pressure Settings pages 34-35 before Please Wait Network Configuration in Progress Machine ID SetupMachine ID for this Compressor Press Enter to Accept Value UP/DOWN Machine ID, Enter Return Before setting or changing a sequence, readSequence Network Data UP/DOWN POSITION, F1 EDIT, Enter Return DAY Monday SEQ Abcd Network Configuration MenuDAY Monday SEQ To clear a particular sequence from the memory, press F1 Intake Filter Hours Filter Service HourmetersReset Service Hourmeters Compressor Hourmeter Menu Compressor Hourmeters Fluid Hours Reset to Press Enter to Return Press F1 to Reset Fluid Filter Hours Press Enter to ReturnFluid Filter Hours Reset to Press Enter to Return Press F1 to Reset Fluid Hours Press Enter to Return Time and Date Menu Current Time on this Control Compressor Maintenance Menu Compressor Control TestTime Menu To View Current Time To SET Time and Date Fluid Press HorsepowerCompressor Control Test Menu Unload Valve Test Press F1 Unload Press Network Diagnostic Unit Configuration DateModem Baud Rate Setup Compressor Diagnostic Menu View Shutdown LOG Section Viii Power$ync II Operation ETOL00 FTOL00 Network Connection Data Confidence Modem INITIALIZATION** Init Indicator is lit, the indicator will remain litF1 to EDIT/ENTER to Accept Value Compressor has Shut Down Emergency Stop Button WAS Pressed Sequence Data Error Press F1 to Clear Schedule Data Error Compressor has Shut Down Take Corrective Action Back-up Mode until all faults have been corrected Inlet Temp Fluid Pressure STG 1 OUT Temp STG 2 in Temp Emergency Stop Pressed Shutdown Log Messages Motor Overload STG 2 Discharge RTD Failure Control log has no entries at that point Probable Causes Corrective Action Failure to Start Section IX Troubleshooting Unscheduled Shutdown Section IX Troubleshooting Probable Causes Corrective Action Unscheduled Shutdown Frequent Fluid Filter Clogging Frequent Air Cleaner CloggingHigh Discharge Air Temperature Probable Causes Corrective Action Low Air Delivery Compressor does not Unload when there is no Air Demand Too Rapid Cycling Between Load and Unload Excessive Fluid in Gearbox Vent Bowl Pressure Relief Valve ExhaustingExcessive Fluid in Buffing Air Vent Bowls Water in Buffing Air Vent Bowls High Interstage Pressure Low Delivery Pressure Microprocessor Will Not Display Messages Erroneous Displays Interval Action Section X- Maintenance Schedule Daily Operating Record Quincy Compressor QSD Quincy Compressor QSD