Daikin VRV X RXQ6-48ANR Series Service Manual page 236

Troubleshooting by Error Code
Troubleshooting
Note(s)
∗1. Make measurement of voltage at the power supply terminal block (X1M).
∗2. Make measurement of voltage at the L1, L2 and L3 terminals of diode module located on the
inverter PCB during the compressor is in operation.
230
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check in Monitor Mode
For the models equipped with 2
compressors, check the
compressor M1C or M2C
applicable to the error code P1
while in monitor mode of the
outdoor unit.
Is supply
voltage imbalance
over approximately
12 V? (∗1)
NO
Is the
imbalance of voltage
applied to the inverter over
approximately 12 V?
(∗2)
NO
Even though the power
supply voltage is normal, the
error recurs.
∗ Use the document "Notice of Inspection Results" attached to spare part.
Explanation to users
Hand the "Notice of Inspection Results" to user to ask
him/her to rectify the imbalance.
YES
Open phase?
NO
YES
<If voltage can be monitored>
Use equipment capable of constantly
recording power supply voltages (e.g.
Memory HiCorder) to record power
supply voltages between phases
(R-S, S-T, and R-T) for a period of
consecutive 1 week.
Power supply voltage imbalance Even
though power supply voltage remains
balanced when making measurement,
it often becomes imbalanced during
night-time (from 6:00 PM to 10:00 PM).
Take countermeasures.
Be sure to explain user that "power supply
voltage imbalance" will occur and Daikin
accepts no responsibility for the imbalance.
SiME341909EA
YES
Correct the open phase of
power supply.
Rectify the power supply
voltage imbalance.
Take countermeasures (listed
below).
Defective noise filter, inverter
PCB or defective wiring
Turn OFF the power supply,
and then check and repair
wirings in the main circuit and
defective components.
(1) Defective connection or
wiring disconnection
between the power supply
and the inverter
(2) Adhesion/meltdown of
contact of, or defective
connection of K1M
(3) Wiring disconnection or
defective connection of
noise filter
Replace the inverter PCB.
RXQ6-12AR: A3P
RXQ14/16AR: A3P, A6P
Part 6 Service Diagnosis