Daikin RXYQ72 Serivce Manual page 180

SiUS39-601
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Imbalance
in supplied voltage is
in excess of 10 V
(TJU). ∗1
NO
Is
the voltage
imbalance applied to the
inverter in excess of
10 V (TJU)?
∗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
∗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 terminals L1, L2 and L3 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) K1M contact disposition,
fusion or contact is poor.
(3) Loose or disconnected
noise filter
Be sure to explain to the user that
there is a "power supply imbalance"
for which DAIKIN is not responsible.
(V2816)
169