Carrier WSHP Open v3 Integration Manual page 25

Filter Status Alarm – The control provides the ability to generate a dirty filter alarm after the number of fan run
hours exceeds a configurable filter alarm timer limit. The control monitors the fan output and if the fan is
operating at any speed, it accumulates run time. If the fan run time hours exceed the configurable limit, an alarm
is generated. To reset the alarm timer after the alarm has been generated, a Reset Filter Alarm input is provided.
You can disable the filter alarm by setting the Filter Alarm Timer Delay to 0 (factory default).
Indoor Air Quality Alarm – The control provides the ability to generate a high CO level alarm during occupied
2
periods whenever the CO sensor value exceeds the adjustable limit. Whenever a transition from unoccupied to
2
occupied occurs, or the occupied alarm limit is changed to a value that causes an alarm condition to occur, the
control will automatically calculate an alarm delay (equivalent to the configured delay time in minutes/ppm, times
the error that occurred, + 15 minutes). This prevents nuisance alarms from occurring when occupancy changes or
the setpoint is changed. You can disable the IAQ alarm by setting Occupied High IAQ Alarm Limit to 0.
Relative Humidity Alarm – The control provides the ability to generate an alarm whenever the space relative
humidity exceeds the alarm setpoint. Separate occupied and unoccupied high humidity alarm setpoints are
provided. The control provides a 5-minute alarm delay during unoccupied periods. During occupied periods, the
controller uses the occupied high RH alarm limit. Whenever an occupancy transition from unoccupied to occupied
occurs, or the occupied high alarm limit is lowered, causing an alarm condition to occur, the control automatically
calculates an alarm delay (equivalent to the configured delay time in minutes/% RH, times the humidity error
condition that occurred, + 15 minutes). This prevents nuisance alarms whenever an occupancy change occurs
and allows time for the unit to correct an alarming humidity condition.
Condenser Water Linkage Failure Alarm (if Condenser Water Linkage was active) – The control generates a
Condenser Water Linkage failure alarm if Linkage fails after once being active. The Linkage status is monitored
and if it fails to be updated from the Loop controller, then a Condenser Water Linkage alarm is generated. There
is a 6-minute alarm delay to prevent false alarms.
NOTE You can reset this alarm only by re-establishing Linkage and correcting the condition that caused the
Linkage failure, or by momentarily setting the Shutdown point to Active.
Airside Linkage Failure Alarm (if Airside Linkage was active) – The control generates an Airside Linkage failure
alarm if Linkage fails after once being active. The Linkage status is monitored and if it fails to be updated from the
master zone controller, then an Airside Linkage alarm is generated. There is a 6-minute alarm delay to prevent
false alarms.
NOTE You can reset this alarm only by re-establishing Linkage and correcting the condition that caused the
Linkage failure, or by momentarily setting the Shutdown point to Active.
OAT Sensor Alarm (if Network OA Temperature was active) – The control generates an OAT Sensor failure alarm if
the value of OAT fails to be updated through the network after once being active. The update status is monitored
and if it fails to be updated, then an OAT sensor alarm is generated. There is an alarm delay (approximately 1
hour) to prevent false alarms, while minimizing the required update rate for OAT.
NOTE You can reset this alarm by momentarily setting the Shutdown point to Active.
SPT Sensor Alarm (if SPT sensor was active)– The control generates an SPT sensor failure alarm if the SPT sensor
fails to communicate with the control for 5 minutes or greater. The update status is monitored and if it fails to be
updated, then an SPT sensor alarm is generated.
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