4
4
5
5
6
6
7
5
5
4
4
• Remove the upper and
lower retaining screws
on the cover and remove it
carefully.
• Check the wall brackets
and tighten if necessary.
• Oil moving parts with
WD40, especially the
sliding brackets
• Check all electrical
connections to the control
box
.
⑦
• Put the unit cover back
again and tighten the
retaining screws.
• Reconnect mains.
④
⑤
en
.
⑥
15