Panasonic 2WAY Multi Technical & Service Manual page 174

For units other than W MULTI
Wire connecting the systems
• When the wiring route is divided into segments by the terminal block of each unit, it is advisable to check
the wiring connection on a segment by segment basis, starting with the segment between the outdoor unit
and indoor unit 1, then the segment between the indoor units 1 and 2, and so on. This allows you to fi nd the
location of the connection failure between units.
For W MULTI units
Outdoor
Unit
For units other than W MULTI
Indoor
Outdoor
Unit 1
Unit
• If the device contains control wire branched from indoor/outdoor control wire, there may be failure in the
indoor/outdoor control wire before branches.
For W MULTI units
Outdoor
Unit
Ground faults or short circuits can also occur in the wiring before branches.
For units other than W MULTI
Outdoor
Unit
Ground faults or short circuits can also occur in the indoor/outdoor control wiring before
branches.
Indoor
Outdoor
Unit
Unit
Indoor
Outdoor
Unit
Unit
Indoor
Outdoor
Unit
Unit
First, check the wire between the outdoor unit with the smallest address and indoor
unit 1.
Then, check the wires between 2, 3, and so on in order.
Outdoor
Unit
Indoor
Unit
Indoor Indoor
Unit 2
Unit 3
Outdoor
Unit
Indoor
Unit
Indoor Indoor
Unit Unit
V–55
Indoor Indoor
Unit Unit
Indoor Indoor
Unit Unit
Indoor Indoor
Unit Unit
Indoor Indoor Indoor
Unit Unit Unit
First, check the indoor / outdoor control wire between the outdoor
unit and indoor unit 1.
Then, check the indoor / outdoor control wire between 2, 3, and so
on in order.
Indoor Indoor
Unit Unit
Indoor
Unit
Branch indoor/outdoor control wire
Wire connecting the systems
Indoor
Unit
Branch wire