Chore-Tronics® 2 Control Control Operation Overview
MT1843B
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you would a normal alarm, erases the alarm message and returns the alarm
Relay to the non alarm state. Also, an ALARM TEST notification will be
listed in the alarm history.Any current alarm condition(s) will be shown
below the current system status in the "Alarm Overview" (Screen 8, Alarm
Conditions tab).
Warning
There also is an alarm message status called WARNING. This does not
change the state of the alarm Relay, but alerts you that something isn’t right.
It needs to be NOTICED in the same way as a “hard” alarm in order to turn
off the flashing lights, etc. An example is a failed Sensor.
Alarm History
In the "Alarm History" screen is a listing of the most recent 20 alarms. The
date and time of each alarm is shown. The amount of time elapsed (hh:mm)
from the time the alarm occurs until the alarm is noticed and recovers is also
show.
Alarm Messages
Sensor Failure #
If a Sensor that is assigned (used) for any purpose gets below 0 °F or above
120 °F for 1 minute, a silent alarm (WARNING) will be given. The
temperature of the backup Sensor defined in the "Setup" screen will be used
while the failed Sensor situation exists. If there are multiple, concurrent
Sensor failures such that it is impossible for the Control to determine a
temperature or temperature average that is needed, a loud alarm will be
given (the alarm Relay changes to the alarm state). At the same time, the
Relay(s) using the failed Sensors turn off. If Mode Sensors are involved, the
current mode will not change as long as the alarm condition exists. When an
average of Sensors is involved, all of those Sensors, plus the backup Sensor
for each Sensor used in that average, would have to fail in order to result in
a hard alarm.
Min / Max Rel Sensor #
The Minimum and Maximum Relative Temperature Alarm limits refer to the
set temperature. A +10.0 maximum relative alarm means that one or more of
the Sensors that are a part of the current mode’s Control Sensor get to be
greater than 10 degrees higher than the set temperature. The alarm message
indicates which of the Sensors is outside the limits. Between the parentheses
to the right of the Min and Max Relative Alarm limits are the resulting actual
temperature limits. They are simply the addition or subtraction of the limit to
or from the current set temperature. A "min" and a "max temp alarm" setting
can be entered for all three modes of ventilation.
No Sensor Available
When a temperature sensor and its assigned Backup Sensor fail then a "No
Sensor Available" loud alarm will be given. This alarm will not recover by
itself and must be cleared by the user.
Pressure Alarm Min / Max
The Static Pressure Alarm limits are only considered by the software when
a Fan or Fans is running or would be running if the toggle switch(s) were in
the automatic position.
For the Static Pressure Alarm to occur, the static pressure has to be outside
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