Mitsubishi Electric PU-P71VHA Service Manual page 20

8-3. INDOOR – OUTDOOR CONNECTING CABLE
The cable shall not be lighter than design 245 IEC or 227 IEC.
The cable length may vary depending on the condition of installation, humidity or materials, etc.
Cross section Wire size
of cable
Round
Flat
Flat
Round
1 : In case that cable with stripe of yellow and green is available.
2 : In the flat cables are connected as this picture, they can be used up to 80m.
S1 S2 S3
3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm
4 : In case of regular polarity connection (S1-S2-S3).
5 : Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or materials, etc.
Outdoor power supply
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
w The Max. cable length may vary depending on the condition of installation, humidity or materials, etc.
Indoor/Outdoor separate
power supply
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
w The optional indoor power supply terminal kit is necessary
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate
connections).
Intermediate connections can lead to communication errors if water enters the cables and causes
insufficient insulation to ground or a poor electrical contact at the intermediate connection point.
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering
the cables.)
Number
2
(mm )
of wires
2.5 3
2.5 3
1.5 4
2.5 4
(3C Flat cable 2)
Max. 45m
3 o 1.5 (polar)
1 o Min. 1.5
Polarity
Clockwise : S1-S2-S3
Not applicable
(Because center wire has no cover finish)
From left to right : S1-Open-S2-S3
Clockwise : S1-S2-S3-Open
Connect S1 and S3 to the opposite angle
2 .
Wire No. o Size (E)
Max. 50m
3 o 2.5 (polar)
1 o Min. 2.5
Wire No. o Size (E)
Max. 120m
2 o Min. 0.3
—
20
Max. 80m
3 o 2.5 (polar) and S3 separated
1 o Min. 2.5
L(m) 5
(50)
1
Not
applicable
2
(45)
3
60
4