Managing the alarms 107
MANAGING THE ALARMS
10 Water
temperature is
not suitable for
Heating/
Cooling
Applicable only for Dual-Pipe FCU
Heating/Cooling Systems.
1. Based on the Pipe Sensor transition
mode:
a. If Hybrid Control is set to Off:
For heating, if the Pipe Sensor reading
is below the Pipe Sensor Threshold for
Heating, or for cooling, if the Pipe
Sensor reading is above the Pipe
Sensor Threshold for Cooling.
b. If Hybrid Control is set to On:
For either heating or cooling, even
though the Pipe Sensor reading might
be below or above the corresponding
Threshold, if it's within 5°F (Temp
Offset, configurable) of the space
temperature, no alarm is triggered.
However, if it remains below or above
the respective Threshold for 4 hours
(Timeout Timer, configurable), an alarm
is triggered.
2. Based on Network Input Changeover
Mode: If 'ni_pipetempmode' is opposite
to the current heating or cooling mode
or is set to 'no use'.
3. Based on Changeover Switch Mode:
If the switch is set to heating while the
current mode is cooling, or if the switch
is set to cooling while the current mode
is heating.
The heating/cooling valve will be
closed, and the fan will run based on
the fan speed configuration. While
the alarm exists, use a purge
interval of 0.5 to perform a pipe
purge.
High
11 Room
temperature
changing trend
is reversed with
system mode
1. If heating is enabled, but there's a
drop of ≥1°F within 30 minutes, an
alarm will be triggered.
2. If cooling is enabled, but there's an
increase of ≥1°F within 30 minutes, an
alarm will be triggered.
Depend on the alarm configuration:
1. If the toggle button is turned off,
only the alarm will be reported.
2. If the toggle button is turned on,
both heating and cooling will be
deactivated.
High
S.N0 Alarm Trigger Scenario Action Level
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