Daikin VRVII Manual page 168

Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
1. Set the high pressure
gauge.
2. Connect the checker
for VRV.
Are the
characteristics
of the high
pressure sensor
normal? (Make a
comparison between the
voltage
characteristics and
the gauge
pressure.)
YES
If the
PCB
pressure
detection
normal? (Make a
comparison between
the checker pressure
data and the voltage
characteristics.)
YES
Reset the operation, and
then restart the outdoor
unit.
A
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
NO
NO
Replace the high
pressure sensor.
Replace the
outdoor unit sub
PCB.
163