Ua" Excessive Number Of Indoor Units - Daikin R410As Service Manual

Troubleshooting by Indication on the Remote Controller
2.47 " UA "
Excessive Number of Indoor Units
UA
Remote
Controller
Display
Applicable All models of indoor unit
Models RXYQ5~48M
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
!
Supposed
!
Causes
!
!
Troubleshooting
∗
212
Excess of connected indoor units
Defect of outdoor unit PC board (A1P)
Mismatching of the refrigerant type of indoor and outdoor unit.
Setting of outdoor P.C. board was not conducted after replacing to spare parts P.C. board.
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the outdoor
P.C. board replaced
to spare parts P.C.
board ?
NO
The total
of indoor units
displaying "UA" and
indoor units connected to the
same refrigerant system is
within connectable
number of
unit∗
YES
Push and hold the RESET
button on the outdoor unit
PC board for 5 seconds.
Does a malfunction occur?
YES
Does the
refrigerant type of indoor
and outdoor unit
match?
YES
The number of indoor units that can be connected to a single outdoor unit system depends on
the type of outdoor unit.
YES
NO
NO
NO
Si39-302
The refrigerant classification has
not been set yet. Please set as per
page 117.
There are too many indoor units
within the same refrigerant
system.
Normal
Matches the refrigerant type of
indoor and outdoor unit.
Replace outdoor unit PC board
(A1P).
(V2827)
Troubleshooting