Daikin REYQ-AATJA, Service Manual, Page: 241 / 495

SiUS372201EA Field Setting from Outdoor Unit
Part 5 Field Settings and Test Operation 234
To activate wrong wiring automatic detection, change [2-20] to 2.
To stop the wrong wiring automatic detection, push RETURN (BS3) . If this function was
not aborted by pushing RETURN (BS3) , the unit will stop its operation after 30-90
minutes. The operation time will depend on the number of connected indoor units.
If wrong wiring is detected after operation, the outdoor unit and corresponding indoor
unit display the error code
UF-01 while the other indoor units display the error code U9 .
oH is displayed if no wrong wiring is detected. (Press the RETURN (BS3) button to
finish.)
If operation stops and the outdoor unit displays UF-18 , operation has been canceled to
prevent failure of the compressor due to wrong wiring. The indoor unit with wrong wiring
identified before the cancellation displays the error code
UF while the other indoor units
display the error code U9 . Check and correct the wiring and then restart operation.
This function can be used when the outdoor temperature is between –5°C and 43°C
(23°F and 109°F) and the indoor temperature is between 20°C and 27°C (68°F and
81°F).
If the indoor temperature is outside the above range, either cooling or heating is
automatically started to bring the indoor temperature to the suitable temperature.
If the outdoor temperature is outside the above range or the indoor temperature is
outside the above range even after cooling or heating, the error code
E-2 or E-3 is
displayed, and the function cannot be used.
If E-4 appears during operation, there may be wrong wiring between indoor units that
are largely different in capacity from each other or the additional refrigerant amount may
be insufficient. Check the wiring of indoor units and confirm that the additional
refrigerant amount has been calculated correctly.
This function can be used after test operation.
Error code during using this function and troubleshooting:
Error code Cause Troubleshooting
E-2
Indoor temperature is out of operating range. Conduct cooling or heating operation to keep
the indoor temperature within the operating
range.
E-3
Outdoor temperature is out of operating
range.
This function cannot be used.
E-4
The high pressure does not rise above a
predetermined value or the low pressure does
not fall below a predetermined value.
Check the wiring of indoor units and confirm
the additional refrigerant amount.
E-5
The number of connected indoor units is one,
or an error is occurring in one of the indoor
units.
Take measures for the indoor unit in which the
abnormality is occurring.
UF-01
Detected wrong wiring after this function. Check the wiring of indoor units where UF
error occurring.
UF-18
Detected wrong wiring with cancelled this
function. (Due to compressor protection)
Check the wiring of indoor units where UF
error occurring.