Daikin R42NUY2S - Page 264

Troubleshooting by Remote Controller Si20-701_B
257
Troubleshooting
Note:
∗1: Voltage measurement point
The high
pressure sensor
is connected to X32A
of outdoor unit
PCB.
NO
YES
YES
NO
Is the
relationship
between high
pressure and VH
normal?
(∗2)
Connect the high
pressure sensor
and turn ON
again.
Measure the voltage (VH)
between the pins # (1)
and (3) of the above
connector (∗1).
Caution
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
YES
Replace the
outdoor unit
PCB.
Replace the high
pressure sensor.
Outdoor unit PCB
High pressure sensor
Micro-computer
A/D input
GND
+5V
Connector Red
Red
Black
White
(4)
(3)
(2)
(1)
∗2 Measure DC voltage here.