Daikin R71FUV1 Service Manual page 181

Si20-701_B
Troubleshooting
Caution
Check the installation
conditions
Is
the stop valve
open?
Is
the
connector (∗1)
for the low pressure
sensor correctly
connected to the
outdoor unit
PCB?
Measure the voltage (DC)
between the pins (2) and
(3) of the connector (∗2).
Is
the
converted
pressure based on
the measured voltage
normal?
(∗3).
CHECK 5
Is low pressure
abnormally
low?
CHECK 5
174
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
NO
YES
NO
YES
NO
YES
YES
NO
Refer to P.466.
Troubleshooting by Remote Controller
Open the stop
valve.
Connect
correctly.
Replace the low
pressure sensor.
Correct the error.
Replace the
outdoor unit PCB
(A1P).