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Section IX - Troubleshooting
Probable Causes:
Corrective Action:
74 Quincy Compressor
®
- QSD™
High Discharge Air Temperature (continued):
THE FAN SHOULD PUSH AIR THROUGH THE COOLERS. IF
INCORRECT
, REVERSE FAN MOTOR STARTER LEADS L
1
AND L
2
.
CLEAN COOLER. LOCATE AND CORRECT CAUSE OF
CONTAMINATION
.
CLEAN OR REPLACE AS NECESSARY.
CHECK AND REPLACE 4-WAY SOLENOID VALVE AS NECESSARY.
CHECK AND REPLACE AS NECESSARY.
CHECK AND REPLACE AS NECESSARY.
CHECK AND REPLACE AS NECESSARY. BOTH MUFFLERS SHOULD
BE
EXHAUSTING AIR DURING UNLOADED OPERATION.
CONTACT AN AUTHORIZED QUINCY SERVICE TECHNICIAN.
CONTACT AN AUTHORIZED QUINCY SERVICE TECHNICIAN.
ADJUST TO PROPER SETTING (BACK-UP MODE ONLY).
REPLACE SENSORS.
REPAIR OR REPLACE AS NECESSARY.
CHECK ALL CONTROL LINE FITTINGS AND TUBINGS.
CHECK LINES BEFORE MPC VALVE.
REPAIR OR REPLACE AS NECESSARY.
REPAIR OR REPLACE AS NECESSARY.
INCORRECT FAN ROTATION
BLOCKED WATER FLOW OR AIR FLOW
CLOGGED AIR FILTER
FAULTY SOLENOID VALVE
FAULTY GAUGES
FAULTY INDICATOR
BLOWDOWN VALVE FAILURE
AIREND FAILURE
RTD READING INCORRECTLY
Compressor does not Unload when there is no Air Demand:
INCORRECT AIR PRESSURE SENSORS
SETTING
FAULTY AIR PRESSURE SENSORS
FAULTY SOLENOID VALVE
LEAKS IN CONTROL LINES
LEAKS IN SERVICE LINES
FAULTY LIFT VALVE(S)
FAULTY BLOWDOWN VALVE(S)