Daikin RXYQ96PYDN Service Manual page 422

SiUS34-801A_b
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is an
imbalance in
supply voltages in
excess of 14V for 460V
units or 6V for
230V units?
(See *1)
NO
Is an
imbalance in
voltages applied to
the inverter in excess of
14V for 460V units or 6V
for 230V units?
(See *2)
NO
<When voltage monitoring is possible:>
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
No abnormalities are
Even if the power supply voltage is not
observed in the power
unbalanced when measuring it, there are
supply, but the imbalance
many cases where it gets unbalanced during
in voltage recurs.
nighttime (around 6:00PM to 10:00PM).
∗In accordance with "notification of inspection results" accompanying spare parts.
Explanation for users
Give the user a copy of "notification of inspection results" and leave
it up to him to improve the imbalance.
Troubleshooting by Indication on the Remote Controller
YES
Open phase?
NO
YES
∗1. Measure voltage at the X1M power supply
terminal block.
∗2. Measure voltage at connector X10A (RED,
WHITE and BLACK wire pins) of the diode
module inside the inverter while the compressor
is running.
measure
YES
Open phase
Normalize field cause.
Fix power supply voltage
imbalance.
Part or wiring defect
After turning the power supply
OFF, check and repair the
main circuit wiring or parts.
(1) Loose or disconnected
wiring between power
supply and inverter
(2) K2 contact disposition,
fusion or contact is poor.
(3) Loose or disconnected
noise filter
Replace the inverter PC board.
Be sure to explain to the user that
there is a "power supply imbalance"
for which DAIKIN is not responsible.
(V2816)
407