Daikin R71FUV1 Service Manual page 161

Si20-701_B
Troubleshooting
Caution
Check for the points shown below.
(1) Is the stop valve open?
(2) Is the high pressure switch connector properly
connected to the main outdoor unit PCB?
(3) Does the high pressure switch have continuity?
Are the 3
points above
OK?
YES
· Mount a pressure gauge on the high pressure
service port.
· Connect the Service Checker.
· Reset the operation using the remote controller,
and then restart the operation.
Does the
stop due to "E3"
recur?
NO
Are
the
characteristics of
the high pressure
sensor normal?
(∗1)
YES
Is the
pressure
detected with the
PCB normal?
(∗2)
YES
A
154
Troubleshooting by Remote Controller
Be sure to turn off the power switch before
connecting or disconnecting connectors, or parts
may be damaged.
NO
YES
Is the
high pressure
switch operating value
normal (i.e.,
4.0MPa)?
NO
NO
NO
YES
Rectify defective
points, if any.
Replace the high
pressure switch.
Replace the high
pressure sensor.
Replace the
outdoor unit main
PCB.