Daikin VRV S RXQ4/5ARV1, Service Manual, Page: 335 / 377

SiAF332111E Troubleshooting by Error Code
Part 6 Service Diagnosis 329
Reference
5.71 Poor Centralized Controller Combination
Applicable
Models
Centralized controller
intelligent Touch Controller
Schedule timer
Error Code
MA
Method of Error
Detection
DIII-NET communication data is used to detect the error.
Error Decision
Conditions
There are other centralized controllers but the schedule timer is set for individual use.
There are multiple main centralized controllers.
There is a remote control adaptor.
Supposed
Causes
 Poor centralized controller combination
 Multiple main centralized controllers
 Defective centralized controller PCB
Troubleshooting
CHECK 13 Refer to page 354.
NO
NO
YES
Not available for combined use with
remote control adaptor. Dismount
the remote control adaptor, and
then reset the power supply of all
the centralized controllers.
Not available for combined
use of schedule timer and
BACnet
®
interface. Dismount
either, and then reset all the
centralized controllers.
Not available for combined
use of schedule timer and
L
ON
W
ORKS
®
interface . Dismount
either, and then reset all the
centralized controllers.
Dismount the Independent/Combined
use connector of the schedule timer,
and then reset all the centralized
controllers.
Integrate one unit for the
centralized controller
connected with the
connector, and then reset all
the centralized controllers.
Disconnect the setting connector of the
main centralized controller and connect it
to a different centralized controller, and
then reset the power supply of all the
centralized controllers. If after this the
error is resolved, the centralized controller
connected with the setting connector is
faulty. Replace the controller.
YES YES
Does the
schedule timer
connect?
NO
NO
NO
Does the
BACnet ® interface
connect?
YES
NO
YES
NO
Does the parallel
interface connect?
YES
YES
Centralized controller: Normal
Main centralized
connector setting table
CHECK 13
Not available for combined
use of schedule timer and
parallel interface. Dismount
either, and then reset all the
centralized controllers.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
The remote
control adaptor (KRP2A series)
is connected.
Does the
Independent/Combined
use connector (CN1/X1A) of the
schedule timer connect?
Are
there two or
more centralized
controllers connected with
setting connectors
(CN1/X1A)?
Possibly caused by external
factors (such as interference)
related to other equipment.
NO
YES
Reset the
power supply of all the
centralized controllers.
MA error recurs?
Does the
L
ON
W
ORKS
®
interface
connect?