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Section VIII - Power$ync II
™
Operation
Quincy Compressor
®
- QSD™ 69
FLUID FILTER CLOGGED
The control monitors the fluid filter element
condition by reading the differential pressure
across the element. Should a high differential be
detected, this message will be logged. This will
not shut down the compressor.
FLUID PRESSURE TOO LOW
The control will log shutdowns that occurred
because of fluid pressure dropping below 10 psi.,
or the set trip point (typically 15 psi).
STG 1 PRESSURE TOO HIGH
This message will be logged if the control sees that
the interstage pressure has risen above the trip
point.
STG 2 PRESS DIFF HIGH
The control will log shutdowns that occurred
because of a high differential pressure across the
stage two airend. This can occur if the interstage
pressure is low (10 psi or less) and the discharge
of Stage two is normal (80 psi or more). Under
these circumstances, high temperatures may be
produced in the airend.
FLASH CHECKSUM ERROR
This message will be posted it the periodic check
of the flash memory sees a change from the stored
value. There is a possibility that the main program
may have an error internally.
STAGE _ MUFFLER PLUGGED
The control will log this warning message when it
detects that the unloaded pressure in the discharge
of stage one or stage two is above 5 psig. This
generally indicates that there may be a problem
with the blowdown mufflers, creating high back
pressure.
EMPTY OR NOT USED
The control log has no entries at that point.
INVALID CODE OR UNKNOWN
This indication means that the controller has found
an entry in the log that does not match any
available in it’s table. This may occur after a
software upgrade, or if U19 has faulty entries.