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HU comm error, Shutdown the system Notification (9)
HU comm error, Shutdown the system Notification (9)

Why am I getting the error notification and what should I do?

Hadas Movshovitz avatar
Written by Hadas Movshovitz
Updated over a week ago

When will I get the notification?

This notification appears when the pHi-Tech system detects a disconnection in the communication cable between the Primary Control Unit and the Hand Unit.

Types of Notifications

Control Unit

The Control Unit will display a message.
Click on the On/Off key to shut down the system.
Look at "What should be done" at the bottom of this article to fix the communication problem.

Mobile App

What should be done?

  1. Verify there's a proper tight connection on both sides of the cable by turning the nuts tightly with a plier.

   2. If that doesn't help, remove the communication cable from the Hand Unit by
       turning the cable nut counterclockwise and gently pulling it out. Repeat this
       process for the other side of the communication cable which is connected to the
       Primary Control Unit.

       Connect it back tightly- Insert the male side to the Control Unit and turn the nut
       clockwise to tighten it.
       Connect the female side to the Hand Unit and turn the nut clockwise to tighten it.

    3. Clean the inlet and outlet holes with Ethanol. See instructions here

4. If that doesn't help, repeat stage 2 with a new communication cable.

This is how the notification appears in different languages:


  • Und. de mao. Erro, Reinicie o sistema

  • Ошибка соединения ручного блока Выкл.системы

  • UM Com Err Apague Sistema

  • El ünitesi bağlantı hatası, Sistemi kapatınız.


  • Kézi egys. Komm HibaRendszer leállítása

  • HU комуник. грешка, Изключете системата

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