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.
Summary of Contents for VRV X RXQ6-48ANR Series
Page 1: ...Service Manual Cooling Only 50 60 Hz RXQ6 48A N R Series SiME341909EA...
Page 289: ...SiME341909EA Wiring Diagrams Part 7 Appendix 283 RXQ10 12ARYFK 2D124184...
Page 290: ...Wiring Diagrams SiME341909EA 284 Part 7 Appendix RXQ14 16ARYFK 2D124183...
Page 295: ...SiME341909EA Wiring Diagrams Part 7 Appendix 289 FXMQ40 50 63 80 100ARV1 3D127112 04 59...