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What can cause Error 7 on the Altistart 48?

Issue: 
Display shows an Err7  

Product Line:
ATS48, Altistart 48

Environment:
All

Cause:
Communication time out between the remote display and control board

Resolution:
- Unplug the remote display and cable.  Plug both back in to see if the fault clears. 

- Remove the Control board and check the connections from the Control to the Power board. 

- If available, try another remote display to see if the problem lies with the remote, or the control board. 

- Replace the control board (VX4G481)
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