Daikin R71FUV1 Service Manual page 267

Si20-701_B
Troubleshooting
Caution
The low
pressure sensor is
connected to the
outdoor unit
PCB.
The
relationship
between the
(∗1) VH and low
pressure is normal (∗2)
when voltage is
measured between
pins (2) and (3)
of outdoor
unit PCB
(∗1).
∗1: Voltage measurement point
Outdoor unit PCB
Micro-computer
A/D input
∗2: Refer to pressure sensor, pressure/voltage
characteristics table on P.471.
260
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
NO
YES
YES
NO
GND
∗2 Measure voltage here.
Troubleshooting by Remote Controller
+5V
(4)
(3)
(2)
(1)
Connect low
pressure sensor
properly and
restart system.
Replace the
outdoor unit
PCB.
Replace the low
pressure sensor.
Red
Black
White