Heat Cool Mode Status: Heat; Modbus Addressing Tool And Modbus; Addresses; Modbus Device Addressing - Trane IntelliPak 3 with Symbio 800 Installation, Operation And Maintenance Manual

Heat Cool Mode Status: Heat

When the unit is in Heat mode and a leak is detected or
sensor fails (see the figure below), the same diagnostics
will trigger.
The VAV Box Relay will be energized for Full Airflow and
supply fan will stay at the heat mode operating speed
which will be at or above minimum speed. Compressor
Operation is disabled, heating operation stays enabled &
outdoor air dampers are at minimum ventilation (all normal
operation for Heat mode).
VFD bypass is not a requirement for leak detection. This
only explains what action will or will not be taken if a leak is
Figure 46. Heat Cool Mode Status: Heat
Note: Refrigerant leak detection and mitigation actions are defined by UL requirements. Therefore, Supply Fan minimum speed
is recommended to remain as defined by factory defaults.
Note: Refrigerant leak detection and mitigation actions are
defined by UL requirements. Therefore, Supply Fan
minimum speed is recommended to remain as
defined by factory defaults.
Modbus Addressing Tool and
Modbus Addresses

Modbus Device Addressing

Modbus Device Addressing allows the user to set and clear
the address of Modbus devices via the user interface.
To set the Modbus Device Address:
1. Press the Device Communications button.
Figure 47. Settings — Device Communications
RT-SVX080A-EN
detected. If the unit has Supply Fan VFD Bypass Installed
and enabled, the supply fan will go to maximum speed. If
the Supply Fan VFD Bypass is installed but disabled AND
the VFD has failed, the supply fan will not start.
The unit will stay in this state until the leak is cleared, or the
failed sensor has been replaced.
Once the leak is cleared, the unit will continue to mitigate
for five minutes. During this five minute mitigation, the
concentration or sensor failure diagnostics will clear but the
mitigation diagnostic will remain. When the five minute time
expires, mitigation will terminate, and the unit will transition
back to normal control.
2. Press the Modbus Device Addressing button.
Figure 48. Device Communications — Modbus Device
Addressing
3. Press the Set Address button. If the Modbus address
is set, a pop-up indicates the Modbus address was set
successfully. If the Modbus address was not set, a pop
up alerts the user of the failure condition.
To clear the Modbus device address:
Press the Clear Address button. If the Modbus address is
cleared, a pop-up will indicate the Modbus address was
cleared successfully. If the Modbus address could not be
cleared, a pop-up will alert the user of the failure condition.
To rebuild the list of Modbus devices:
Press the Rebuild button.
Sequence of Operation
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