Troubleshooting: HUB

Having issues with the HUB and need to find the cause? Suspecting someone to have damaged the cable or that there's an issue with power supply? This article will help you troubleshoot and verify if you successfully made the HUB work again.

Troubleshooting

1. This guide will start the troubleshooting down in the heating central and move towards the HUB but you can ofcourse start at the HUB and work your way down to the heating central aswell. Taking a look at the HUB and cables on the facade first is a quick way to determine if something is wrong.
2. Finding Kiona's junction box.
   • It is usually located in the heating central, near the heating controller.
   • It could also have been placed outside, next to the HUB.
   • Inside the box you find a circuit board(See picture below) and a transformer. Kiona's transformer is either 24V(For newer models like 912/913/2.0) or an older plug in model of 18V(For 901/902/902x).
     
3. Time to check the power supply to different components.
   • First confirm you have 230V AC to the transformer by measuring at (1).
     
     

     NOTE!

     Dealing with 230V must be carried out by a qualified electrician.

   • Confirm you have +24V DC or +18V DC (Depending on type of transformer)
     by measuring at (2). If broken we need to replace it, contact Kiona support.
   • Confirm you have +24V DC or +18V DC (Depending on type of transformer)
     by measuring at (3). If not, feel free to bypass the circuit board through a connector.
   • If all looks OK, move on to the next chapter and reboot the HUB.
     

Rebooting

1. You can disconnect the HUB from the power supply by unplugging the grey 2-pin connector from the circuit board.
   
2. Wait one minute, then put the 2-pin connector back in place.
    
   

   NOTE!

   The LED on the circuit board only indicates that the circuit board itself has power.

3. To verify you have power on the HUB. Allow the HUB to get online by waiting 2 minutes, then send the SMS "STAT" to the HUB's GSM number(Found on label or on it's circuit board).
   
   
   
   In the response you can see this information:
   • Reboot – Timestamp for last reboot
   • RTC – Timestamp for latest contact with Kiona servers
   • Teq – Temperature being sent to heating controller from HUB
   • Req – Resistance for current Teq and set signal type.

Further Troubleshooting

1. If you have power through the circuit board but the HUB will not start even after reboot it’s time to measure at the HUB.
   • Confirm there’s no issue with the cables by measuring in the junction box on the façade where the grey cable from the HUB connects.
   • You should measure +24V DC or +18V DC (Depending on type of transformer)
     
2. If there is power where the HUB's grey cable connects and there’s no red or green LED light (See photo's above), open the HUB casing.
   • Confirm the connector at the end of the grey cable inside the casing is attached to the circuit board properly.
   • Sometimes the cable clamp is twisted so tightly that it disconnects the connector or some of the wires, and as a result the HUB does not get power.

3. If everything is OK in terms of electricity and the reboot did not help, the HUB is broken and should be replaced. At this point, contact Kiona support, and we will guide you from there.