Daikin SkyAir RZR-TA Series Service Manual page 217

SiUS281811EA
Error code
U4 - 01 Indoor-outdoor transmission error
Refrigerant type error
UA - 13
Not applicable for self-cleaning decoration panel
UA - 15 [when the self-cleaning decoration panel
is mounted]
UA - 17 Incorrect electric heater capacity setting
Part 6 Service Diagnosis
Description of error
Troubleshooting
Description of diagnosis
Refer to the U4 flowchart.
The type of refrigerant used for the indoor unit is different from
that used for the outdoor unit.
An outdoor unit is not applicable for the self-cleaning decoration
panel is connected.
Refer to page 287.
Troubleshooting by Error Codes
211