Daikin VRV EMERION RXYQ-AATJA Service Manual page 251

SiUS342303E
Error code
UA - 17 Connection of excessive indoor units
UA - 18 Connection of wrong models of indoor units
UA - 20 Improper combination of outdoor units
UA - 21 Connection error
UA - 31 Multi-unit combination error
UF - 01 Wrong wiring check error
UF - 05 Defective stop valve for test operation
Wiring error
UH - 01
3.2.3 Low-Temperature Hydrobox
Regarding the sub error codes and detailed troubleshooting by error codes related to the
low-temperature hydrobox (HXY-TA), refer to the service manual SiUS392016EA.
Part 6 Service Diagnosis
Error Description
Troubleshooting
Refer to the UA flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the UF flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Refer to the UH flowchart and make a diagnosis of the
relevant unit based on the Error code shown to the left.
Troubleshooting by Error Code
Diagnosis
244