Service manual

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(V2806)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
The
relationship
between the ∗1
VH and high
pressure is normal (see
∗2) when voltage is
measured between X46A
pins (1) and (3) of
outdoor unit PC
board (A1P)
(see ∗1).
Replace the high pressure sensor.
Connect the high pressure sensor
and turn on again.
NO
NO
Replace outdoor unit PC board
A1P.
YES
YES
The high pressure
sensor is connected to
X46A of outdoor unit
PC board (A1P).
Outside unit PC board A2P
+5V
X46A
Red
Black
White
GND
*2 Measure DC voltage here.
Low pressure sensor
Microcomputer
A/D input
4
3
2
1
(V2807)