Daikin VRV III RXYQ5-54PY1, Руководство по обслуживанию, Страница: 282 / 398

Si34-601A Troubleshooting by Indication on the Remote Controller
Troubleshooting 271
3.37
“
P1
”
Outdoor Unit: Inverter Over-Ripple Protection
Remote
Controller
Display
P1
Applicable
Models RXYQ5P~54P
Method of
Malfunction
Detection Imbalance in supply voltage is detected in PC board.
Imbalance in the power supply voltage causes increased ripple of voltage of the main circuit
capacitor in the inverter. Consequently, the increased ripple is detected.
Malfunction
Decision
Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
★
Malfunction is not decided while the unit operation is continued.
"P1" will be displayed by pressing the inspection button.
When the amplitude of the ripple exceeding a certain value is detected for consecutive 4
minutes.
Supposed
Causes
„
Open phase
„
Voltage imbalance between phases
„
Defect of main circuit capacitor
„
Defect of inverter PC board
„
Defect of K2 relay in inverter PC board
„
Improper main circuit wiring
Troubleshooting
(V2816)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is
the voltage
imbalance applied to the
inverter in excess of
14 V (Y1)?
∗
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) K2 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
No abnormalities are
observed in the power
supply, but the imbalance
in voltage recurs.
Explanation for users
Fix power supply voltage
imbalance.
Replace the inverter PC board.
YES
YES
NO
Imbalance
in supplied voltage is
in excess of 14 V
(Y1).
∗
1
Open phase?
<When voltage monitoring is possible:>
∗
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.
∗
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.
measure
YES
NO