62 | P a g e
711 to 716 Description Zone Return temperature sensor fault.
Cause: The return sensor on the specified zone is faulty. The individual zones faults are identified as 711 for zone 1,
712 for zone 2, and so on up to zone 6, 716.
1. Check the continuity of the sensor and replace the sensor if necessary.
2. Check the condition of the connections and wiring from the sensor concerned to the PCB. Use a multimeter
to confirm continuity through the cables. Replace cables as required.
3. If the cables and the sensor are ok, replace zone manager.
722 Description Zone 2 overheating.
Cause: The Zone Manager ST2 overheat thermostat has tripped. **Note** if 2 zone managers have been used
together, the fault may be in either zone manager and is not individually defined.
1. Check the link and its connection to the "ST2" terminal block on the module.
2. Check the maximum heating temperature setting for Zone 2 or 4 via parameter 5.2.5 or 15.2.5.
3. Check the connection of the safety thermostat to the "ST2" terminal block on the module.
4. Check the wiring harness and connectors if a safety thermostat is in use. Replace as required.
5. Check for continuity over the thermostat and replace as required.
6. If the above is all ok, replace the zone manager.
723 Description Zone 3 overheating.
Cause: The Zone Manager ST3 overheat thermostat has overheated. **Note** if 2 zone managers have been used
together, the fault may be in either zone manager and is not individually defined.
1. Check the link and its connection to the "ST3" terminal block on the module.
2. Check the maximum heating temperature setting for Zone 3 or 6 via parameter 6.2.5 or 16.2.5.
3. Check the connection of the safety thermostat to the "ST3" terminal block on the module.
4. Check the wiring harness and connectors if a safety thermostat is in use. Replace as required.
5. Check for continuity over the thermostat and replace as required.
6. If the above is all ok, replace the zone manager.
To Next Page
Loading...
Need help?
General
