Daikin VRV S RXQ4/5ARV1 - Page 325

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 319
RXMQ6-12AR
Ensure the sub code or
the lamp display of
monitor mode, and then
go to the following:
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Go to Diagnosis Flowchart-1.
(Connection of excess indoor
units)
Go to Diagnosis Flowchart-2.
(Connection of incorrect models
of indoor units)
Go to Diagnosis Flowchart-3.
(Wrong connection)
UA-17
Error code Sub code
Error code Sub code
Error code Sub code
UA-18
UA-21
NO
YES
The number of
indoor units connected
to the same system is
less than 64.
Replace the outdoor unit main
PCB (A1P).
NO
YES
Check if
the refrigerant
type of the outdoor
unit corresponds to that
of the indoor unit.
Excess indoor units are
connected.
Check for the connection to
connect the proper number of
indoor units.
Replace the outdoor unit main
PCB (A1P).
Match the refrigerant types of the
outdoor unit and the indoor unit.
Diagnosis Flowchart-1
UA-17
Error code Sub code
Diagnosis Flowchart-2
Error code Sub code
UA-18
Replace the outdoor unit main
PCB (A1P).
Diagnosis Flowchart-3
Error code Sub code
UA-21