P1" Inverter Over-Ripple Protection - Daikin SkyAir RZQ200 · 250C7Y1B Service Manual

Diagnosis by Remote Controller

4.33 "P1" Inverter Over-Ripple Protection

P1
Remote
Controller
Display
Applicable RZQ
Models
Method of Imbalance in supply voltage is detected in PC board.
Imbalance in the power supply voltage causes increased ripple of voltage of the main circuit
Malfunction
capacitor in the inverter. Consequently, the increased ripple is detected.
Detection
Malfunction When the resistance value of thermistor becomes a value equivalent to open or short circuited
status.
Decision
★
Conditions
When the amplitude of the ripple exceeding a certain value is detected for consecutive 4
minutes.
Supposed
Causes
Troubleshooting
154
Malfunction is not decided while the unit operation is continued.
"P1" will be displayed by pressing the inspection button.
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
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 14 V
(Y1). ∗1
NO
Is
the voltage
imbalance applied to the
inverter in excess of
14 V (Y1)?
∗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.
No abnormalities are
Power supply voltage imbalance
observed in the power
supply, but the imbalance
in voltage recurs.
∗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.
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
SiBE26-701
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 (A3P)
(2) K2 contact disposition,
fusion or contact is poor.
(3) Loose or disconnected
noise filter
Replace the inverter PC board (A3P).
Be sure to explain to the user that
there is a "power supply imbalance"
for which DAIKIN is not responsible.
Troubleshooting
(V2816)