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 applies.
The table below shows faults and priority.
Priority | Fault | Thermostat | Fault information on Modbus |
---|---|---|---|
Display | Value object fault | ||
- | No fault | --- | No fault |
1 |
Internal sensor error |
Er1 |
Built-in sensor |
2 |
External / remote sensor error (RDF4..BN) |
Er3 |
Sensor X1 defective |
3 | Communication error, i.e. no communication after two heartbeats | * | Communication |
3 | External fault input X1 (RDF4..BN) | * | Input X1 |
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 the Quick Config app (diagnostic menu).