Chigo CMV-50V9A-S, Service Manual

Page: 23 / 50

Indoor unit fuse is off.
The indoor unit fuse
The condition that the lamp panel
can’t display
。
3.
（
1
）
when the indoor null line is off
，
the system displays F1 code
。
（
2
）
when indoor communication wire is off
，
the system also displays F1 code
。
The inserted slice to null line
The indoor unit null line is off
。