Daikin R407C PLUS, Service Manual

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Troubleshooting (Inverter) Si33-105
202 Troubleshooting R407C PLUS Series Heat Recovery System
5.7 Outdoor Unit: Inverter Over-Ripple Protection
Remote
Controller
Display
P1
Supposed
Causes
!
Open phase
!
Voltage imbalance between phases
!
Defect of main circuit capacitor
!
Defect of inverter unit
!
Defect of K1M
!
Improper main circuit wiring
Troubleshooting
(VF069)
Is
the voltage
imbalance applied to the
inverter in excess of
20 V (Y1)?
H
2
NO
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) KIM contact disposition,
fusion or contact is poor.
(3) Loose or disconnected
noise filter
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.
Open phase
Normalize field cause.
Power supply voltage imbalance
Explanation for users
Fix power supply voltage
imbalance.
YES
YES
NO
Imbalance
in supplied voltage is
in excess of 20 V
(Y1).
H
1
Open phase?
<When voltage monitoring is possible:>
H
1. Measure voltage at the X1M power supply
terminal block.
H
2. Measure voltage at terminals L1, L2 and L3 of
the diode module inside the inverter while the
compressor is running.
H
In accordance with "notification of inspection results" accompanying spare parts.
Give the user a copy of "notification of inspection
results"and leave it up to him to improve the imbalance. Be sure to explain to the user that there
is a "power supply imbalance" for
which DAIKIN is not responsible.
Disposal
YES
NO
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.