I have a Repco treamill coming up with error code L5 or LS unsure why?

Kylie requested 3 quotes from Appliance Repairmen in Christies Beach

Not sure of the model number, but when you go to increase speed it comes up with a code L5 or LS the treamill belt will not move at all.

Electrical repair -
the screen does not work.

Tredmill Repair
Tredmill is speeding up without pressing anything, and sometimes showing an...

Treadmill repair
Everything on the treadmill works but it trips the breaker when you go to...

Treadmill repair
Keeps switching on the safety switch when I turn it on