Daikin REYQ-TA Series, Service Manual

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SiUS371614E Troubleshooting by Error Code
Service Diagnosis 264
3.61 Improper Combination of Indoor Unit and Outdoor Unit,
Indoor Unit and Remote Controller
Error Code
UA
Applicable
Models
All indoor unit models
All outdoor unit models
Method of Error
Detection
A difference occurs in data by the type of refrigerant between indoor and outdoor units.
The number of indoor units connected is out of the allowable range.
Error Decision
Conditions
The error decision is made as soon as either of the abnormalities aforementioned is detected.
Supposed
Causes
„
Excess of connected indoor units
„
Defective outdoor unit PCB
„
Mismatch of the refrigerant type of indoor and outdoor unit.
„
Setting of outdoor unit PCB was not carried out after replacing to spare PCB.
Troubleshooting
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.
(Improper combination of outdoor
units)
Go to Diagnosis Flowchart-4.
(Wrong connection)
Go to Diagnosis Flowchart-5.
(Multi system combination error)
UA-17
Error code Sub code
Error code Sub code
Error code Sub code
Error code Sub code
Error code Sub code
UA-18
UA-20
UA-21
UA-31