86
PKG-SVX027D-EN
Table 25. General unit alarming (continued)
Diagnostic: Software High Duct Static Alarm (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
HVAC Critical Alarm. Unit will shut down and be
prevented from running until
this sensor is in a normal
state.
The Duct Static Pressure
sensor is reading above the
Duct Static Pressure Safety
Lockout Setpoint.
• VAV Boxes are closed
down.
• Restriction in ductwork.
Manual Reset Required once
the issue is resolved. User
must toggle the Alarm Reset
value.
Diagnostic: Condenser Water Flow Loss (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
HVAC Critical Alarm. The Compressors will be
shut down and prevented
from running until the
condition is resolved.
The Condenser Water Flow
Switch input is open
indicating a no water flow
condition.
• Pumps not running.
• Valves are closed.
• Strainer is plugged.
Manual Reset Required once
the issue is resolved. User
must toggle the Alarm Reset
value.
Diagnostic: Condenser Water Low Temperature Lockout (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
HVAC Critical Alarm. Unit will shut down and be
prevented from running until
this sensor is in a normal
state.
The Condenser Water
entering or leaving
temperature is below 35
degrees for 10 minutes.
• Cold Outdoor
temperatures at cooling
tower.
• Cold incoming air into
the unit.
Manual Reset Required once
the issue is resolved. User
must toggle the Alarm Reset
value.
Note: These alarms are generated by sensors on the unit not related to the Fans or Compressors and will shut down the unit.
Table 26. General unit warning
Diagnostic: Dirty Air Filter (In Alarm)
Notification Class Action Reason
Typical Causes Reset Required
HVAC Service Required. No action taken other than to
notify end user of condition.
The Filter differential
pressure is greater than the
Dirty Air Filter DP Setpoint.
• Filters are dirty.
• Fan speed is too great.
• Failed Pressure sensor.
Manual Reset Required once
the issue is resolved. User
must toggle the Filter Alarm
Reset value.
Diagnostic: Dirty Condenser Tee Filter (In Alarm)
Diagnostics
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