Daikin VRV X RXQ6-48ANR Series, Руководство по обслуживанию

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Troubleshooting by Error Code SiME341909EA
236 Part 6 Service Diagnosis
5.50 Open Phase
Applicable
Models
All outdoor unit models
Error Code
U1
Method of Error
Detection
The phase of each phase is detected by phase detection circuit and open phase is judged.
Error Decision
Conditions
When any phase is open phase.
Supposed
Causes
 Abnormal supply voltage
 Open phase
 Defective outdoor unit main PCB
Troubleshooting
Power
supply harness
(3-phase, 4 wires) is
properly connected to
the terminal
block.
The fuse of the noise
filter PCB is blown out.
Power supply
voltage falls within
380 V to 415 V between
L1-L2, L2-L3
and L3-L1.
The connectors
between the terminal
block, noise filter PCB and
inverter PCB are properly
connected.
Connect the harness properly.
Replace the inverter PCB. (
#
1)
#
1
RXQ6-12AR: A3P
RXQ14/16AR: A3P, A6P
Replace the noise filter PCB (
#
2) and
the inverter PCB (
#
1).
#
2
RXQ6-12AR: A2P
RXQ14/16AR: A2P, A5P
NO
NO
YES
YES
Check the power supply for
abnormalities.
NO
YES
Connect the connectors properly.
NO
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.