Daikin RXSQ24TAVJU Service Manual page 168

Troubleshooting by Error Code
Error code
U4 - 01 Indoor-outdoor transmission error
UA - 13 Refrigerant type error
UA - 15 Not applicable for self-cleaning decoration
panel [when the self-cleaning decoration panel
is mounted]
UA - 17 Incorrect electric heater capacity setting
UH - 05 Climate Talk Communication system
combination error (before initial setting for
communication completes)
UH - 06 Climate Talk Communication system
combination error (after initial setting for
communication completes)
155
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 234.
Refer to page 242.
Refer to page 243.
SiUS331708EA
Service Diagnosis