Fault

A fault is sent on the bus in the event of a fault (e.g., communication configuration, etc.).

Priority of alarms

If several faults occur at the same time, the fault with highest priority is used.

The table below shows faults and priority.

Priority

Fault

Thermostat

Fault information on BACnet

Display

Value object fault

-

No fault

---

No fault

1

Internal sensor error

Er1

Built-in sensor

3

Communication error, i.e. no communication after two heartbeats

*

Communication

3

External fault input X1

*

Input X1

2

External / remote sensor error

Er3

Sensor X1 defective

3

External fault input D1

*

Input D1

* If all faults occur at the same time on HMI, the priority is X1 > D1 > No communication. Users can check the details via diagnostic parameter d00 or app Quick Config (diagnostic menu).