Check Operation Not Executed - Daikin RXYQ-TA Series Service Manual

Troubleshooting by Error Code

3.57 Check Operation not Executed

U3
Error Code
Applicable
All outdoor unit models
Models
Method of Error
Check operation is executed or not executed
Detection
Error Decision Error is decided when the unit starts operation without check operation.
Conditions
Supposed
Check operation is not executed.
Causes
Troubleshooting
265
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
The contents of individual
failures vary with sub code.
Ensure the sub code, and
then go to the following:
U3-03
U3-04
U3-05
U3-06
U3-07
U3-08
SiUS341615E
Conduct the test operation.
(The test operation has not
been conducted.)
Check for the refrigerant
piping, and then conduct
the test operation.
Conduct the test operation
(due to the premature end
of the test operation).
Conduct the test operation
(due to the premature end
of the test operation).
Check for transmission
between indoor and
outdoor units, and then
conduct the test operation.
Check for transmission
between indoor and
outdoor units, and then
conduct the test operation.
Service Diagnosis