Daikin R71FUV1 Service Manual page 335

Si20-701_B
A
<When voltage monitoring is possible:>
No abnormalities are
observed in the power
supply, but the
imbalance in voltage
recurs.
Explanation for users ∗In accordance with "notification of inspection
Give the user a copy of "notification of
inspection results" and leave it up to
him to improve the imbalance.
328
Troubleshooting by Remote Controller
Using a device capable of
constant recording of
power supply voltage
record power supply
voltage between 3 phases
(L1 ~ L2, L2 ~ L3, L3~L1)
for about one continuous
week.
Power supply voltage
imbalance
results" accompanying spare parts.
∗1. Measure voltage at
the X1M power
supply terminal
block.
∗2. Measure voltage at
terminals RED,
BLACK and WHITE
wires of the diode
module inside the
inverter while the
compressor is
running.
measure
Replace the
inverter PCB.
Be sure to explain to the user
that there is a "power supply
imbalance" for which DAIKIN
is not responsible.