13-9-653 Page 24
Message Action needed
HI SYSTEM PRESS Pressure in excess of the programmed high pressure limit has been
detected. The most likely cause is other, higher pressure compressors
on the same air system; separate these from this compressor unit. Other
possible causes are loose connections to the transducer, electrical noise
and transients, or improper setting of the high pressure limit.
HIGH AMP SENSOR The controller is sensing current to the main motor when it is turned off.
Check that the main starter is operating properly. Check for proper
installation of the current transformer and current transducer.
HIGH DISCH TEMP This indicates that the controller has detected temperature in excess of
the programmed high temperature limit at the airend discharge. The
most common cause for this is inadequate package cooling. Ensure
proper air flow for air cooled units, or adequate cooling water for water
cooled units. Check for proper oil level, and fill as required. Monitor the
temperature carefully during restarts after servicing.
HIGH DISCH TEMR This indicates that the controller has detected a rapid temperature rise in
the airend discharge. This normally would indicate a loss of coolant
injection into the airend. Check oil level, and fill if required. Completely
check all oil piping, the filter, and flow controls for blockage or freezing.
This may also be caused by a loose connection at connector 7 of the
controller. Monitor the temperature carefully during restarts after
servicing.
HIGH RESVR PRESS Pressure in excess of the programmed high pressure limit has been
detected. This shutdown will occur if a loss of pneumatic controls
occurs. Check the inlet valve, all control piping, solenoid valves, and all
other control devices to find the cause for the inlet valve not closing.
Other possible causes are loose connections to the transducer, electrical
noise and transients, or improper setting of the high pressure limit.
HIGH RESRVR TEMP This indicates that the controller has detected temperature in excess of
the programmed high temperature limit at the air / oil separator. The
most common cause for this is inadequate package cooling. Ensure
proper air flow for air cooled units, or adequate cooling water for water
cooled units. Check separator element, replace non-standard separators
with recommended separator. Monitor the temperature carefully during
restarts after servicing.
HIGH RESRVR TEMR This indicates that the controller has detected a rapid temperature rise in
the air / oil separator. Use only recommended separators; replace non-
standard separators. This may also be caused by a loose connection at
connector 7 of the controller. Monitor the temperature carefully during
restarts after servicing.
HIGH VIBRATION 120 volts has been removed from terminal 7 of the terminal strip. This is
normally shipped jumpered directly to terminal 9, but the jumper may be
removed to add a field installed shutdown switch. Reset the external
switch.
LOW SUMP PRESS The controller has attempted to start and load the compressor, but
pressure is not building up in the oil reservoir. This may indicate either a
failure of the motor to turn the compressor, or a failure of the inlet valve
to open. If the latter, check also the wiring and piping to solenoid valves
IVO and IVC; these are both turned on to load up the compressor.
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