Daikin RXQ12AHR Service Manual page 188

Troubleshooting with Remote Controller
Error code
U1 - 16 Open phase for power supply (Master)
U1 - 17 Open phase for power supply (Slave 1)
U1 - 18 Open phase for power supply (Slave 2)
U1 - 19 Hz error for power supply (Master)
U1 - 20 Hz error for power supply (Slave 1)
U1 - 21 Hz error for power supply (Slave 2)
U2 - 01 Shortage of inverter power supply voltage (Master)
U2 - 08 Shortage of inverter power supply voltage (Slave 1)
U2 - 11 Shortage of inverter power supply voltage (Slave 2)
U2 - 22 Shortage of inverter 2 power supply voltage (Master)
U2 - 25 Shortage of inverter 2 power supply voltage (Slave 1)
U2 - 28 Shortage of inverter 2 power supply voltage (Slave 2)
Initial installation alarm / Test operation failed due to
U3 - 02
indoor unit error
U3 - 03 Test operation not conducted
U3 - 04 Abnormal end of test operation
Premature end of test operation during initial
U3 - 05
transmission error – check indoor unit error U4 / U9
Premature end of test operation during normal
U3 - 06
transmission error
Premature end of test operation due to transmission
U3 - 07
error
Premature end of test operation due to transmission
U3 - 08
error of all units
System refrigerant auto charge operation not yet
U3 - 10
executed
Transmission error between indoor unit and outdoor
U4 - 01
unit
Transmission error between indoor unit and system:
U4 - 03
check indoor unit error
Error when external control adaptor for outdoor unit is
U7 - 01
installed
Alarm when external control adaptor for outdoor unit is
U7 - 02
installed
U7 - 03 Transmission error between master and slave 1 units
U7 - 04 Transmission error between master and slave 2 units
U7 - 05 Multi system error
U7 - 06 Error in address settings of slave 1 and 2
Connection of four or more outdoor units in the same
U7 - 07
system
Error in indoor unit connection capacity for test
U7 - 11
operation
Other indoor units and outdoor unit abnormality
U9 - 01
TSS plus unit field settings error, CT
UA - 00
address duplication warning
UA - 03 Connection of excessive indoor units
UA - 17 Connection of excess indoor units
UA - 18 Connection of incorrect models of indoor units
UA - 20 Improper combination of outdoor units
UA - 21 Wrong connection
UA - 31 Multi system combination error
UF - 01 Wrong wiring check error
UF - 05 Defective stop valve for test operation
UH - 01 Wiring error
182
Description of error
Troubleshooting
Refer to the U1 flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the U2 flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the U3 flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the U4 flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the U7 flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the U9 flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the UA flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the UF flowchart and make a diagnosis based
on the Error code shown to the left.
Refer to the UH flowchart.
SiAF341904E
Diagnosis
Part 6 Service Diagnosis