Viconics VTR7300 BACnet Integration Manual Manuel d'utilisateur télécharger pdf (Page 31)

Troubleshooting Section

Error / Trouble

Condition

Possible Cause

Solution

Thermostat does not

come online

Two or more controllers have the same

MAC address.

Modify each duplicate address to a

unique number.

The MS/TP network has too many

devices.

Do not exceed the maximum number of

devices and maximum length allowed

by the EIA-485 specifications.

Too many devices were installed

without any repeaters.

Repeaters need to be installed as

specified in this document.

The MS/TP cable runs are broken

Locate the break and correct wiring

MS/TP connections at the module are

reversed

Respect polarity of the wires on a

MS/TP network.

The thermostat does not have power

Apply power to the thermostat

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Viconics VTR7300 BACnet Integration Manual Manuel d'utilisateur Page 31