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5
• Non-polarized control wiring between
outdoor and indoor units
• Wiring diagnosis system
Use the switches on the micro
processor PCB of the outdoor unit.
• Detects wiring to the indoor unit a4
which should not be in system A.
• b4 is missing in system B.
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Outdoor unit
Wiring
Piping
A
system
B
system
Allowable pipe length:
175 m equivalent length
Outdoor unit
From 1st branching to the
farthest indoor unit: 65 m
Height difference between
indoor units: 30 m
Height difference between
indoor and outdoor unit: 50 m
1st branching
section
8F
7F
1F
2F