Page 195 - Womens Pavilion

“Oil-Less” Scroll Medical Air
3.0 System Operation
High Air Temperature Alarm - This will not shut
down the compressor in question but instead is
a warning that a shutdown is likely to occur. The
condition should be checked immediately (see
“High temperature alarm” in the Troubleshooting
Section 4.0) to avoid a compressor shutdown.
Control Circuit Alarm - This will not shut down
the compressor in question but instead is a
notifi cation that there is a loss of communication
between printed circuit boards within the control
panel. See Appendix D on Control System for
troubleshooting.
Figure 3.9 Main Screen - Alarms
Dew Point Alarm - This alarm will activate if the
dew point exceeds the alarm setting. To silence the
alarm, press the horn silence button. If the situation
does not correct itself through normal dryer use,
see Appendix B, section B.7 Troubleshooting for
possible causes and solutions. The alarm remains
latched until the alarm condition is reset by the
operator.
CO Level Alarm - This alarm will activate if the
CO level exceeds the 10 ppm set point. To silence
the alarm, press the horn silence button. See
Appendix C, section C.10 Troubleshooting for
possible causes and solutions. The alarm remains
latched until the alarm condition is reset by the
operator.
4107 9000 69.06 3-8
Lag Unit Running Alarm - This alarm will activate
if the last available compressor unit comes on.
(See Section 3.4 for normal operation) To silence
the alarm, press the horn silence button. In the
event the lag alarm is persistent, check to see if any
leaks or valves are open downstream or reduce the
system load.
Ambient Temperature Alarm - This alarm will
activate when the temperature in the room
exceeds the set point. The audible alarm will not
sound but a touchscreen will show an active alarm
and record it in the event log. The alarm remains
latched until the alarm condition is reset by the
operator.
Dryer Tower Switching Failure Alarm (Optional)
For units with this feature, there is one pressure
switch that senses pressure inside each dryer
tower for a total of two pressure switches for each
dryer. If the pressure in both towers of the same
dryer fall below 50 psig, the “Dryer # Switch” on
the alarm screen will change from Green to Red
and the remote dryer fault contacts (one for each
dryer) will change condition (refer to the wiring
diagram that came with the unit for terminal
numbers). A short time delay (1.5 seconds) is
started when both pressure switches fall below 50
psig to eliminate false alarms during normal tower
switching. To eliminate alarms during periods
when the dryer is turned “off ” for maintenance
or other reasons, the dryer tower switching failure
alarm is bypassed for that dryer.
Low Dryer Outlet Pressure Alarm (Optional)
For units with this feature, there is an adjustable
pressure switch located upstream of the dryer
check valve that will alarm if the pressure in that
line drops below the 75 psig factory setpoint. In
the event of an alarm, the “Dryer # Pressure” on
the alarm screen will change from Green to Red
and a remote set of contacts will change condition
(refer to the wiring diagram that came with the
unit for terminal numbers).