Daikin VRV EMERION RXYQ-AATJA Service Manual page 365

SiUS342303E
Note(s)
1. Refer to page 361.
Part 6 Service Diagnosis
Diagnosis Flowchart-1
UA-17
Error code Sub code
The
number of indoor units
YES
connected to the same system
is less than 64.
NO
Diagnosis Flowchart-2
UA-18
Error code Sub code
Check if
the refrigerant
YES
type of the outdoor unit
corresponds to that of
the indoor unit.
NO
Diagnosis Flowchart-3
UA-20
Error code Sub code
NO
Multi connection?
YES
Was the
NO
outdoor unit main PCB
replaced with a spare
PCB?
YES
Was
NO
proper setting of spare
PCB made?
YES
Troubleshooting by Error Code
Is the
NO
model of indoor unit
Replace the outdoor unit main
FXTQ-TA?
PCB (A1P).
YES
Incorrect
electric heater
YES
capacity setting
Replace the outdoor unit main
troubleshooting ( 1)
PCB (A1P).
checked?
NO
Refer to Incorrect electric heater
capacity setting troubleshooting.
( 1)
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.
Replace the outdoor unit main
PCB (A1P).
NO
A different model
Replace the outdoor unit main
of outdoor unit is
PCB (A1P).
connected.
YES
Check for the model of outdoor
unit.
Make setting again, and then
reset the power supply.
Replace the spare PCB.
358