Daikin RXYQ96PYDN Service Manual page 436

SiUS34-801A_b
*1, *2; See the chart and footnote on P422
*3, *4; See the chart and footnote on P423
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
A
YES
The high
pressure sensor
NO
is connected to X32A of
outdoor unit PC
board (A1P).
YES
The
relationship
between the
*1 VH and high
pressure is normal
(see *2) when voltage is NO
measured between X32A
pins (1) and (3) of
outdoor unit
PC board
(A1P)
(see *1).
YES
The low
pressure sensor is
NO
connected to X31A (blue)
of outdoor unit PC
board (A1P).
YES
The
relationship
between the
*3 VH and low
pressure is normal
(see *4) when voltage NO
is measured between X31A
pins (2) and
(3) of outdoor
unit PC board
(A1P)
(see *3).
YES
Troubleshooting by Indication on the Remote Controller
Connect the high pressure
sensor and turn on again.
Replace the high pressure
sensor.
Connect low pressure sensor
property and restart system.
Replace the low pressure
sensor.
Replace the outdoor unit PC
Board (A1P).
(V2822)
421