Ua" Improper Combination Of Indoor And Outdoor Units; Indoor Units And Remote Controller - Daikin VRV II RXYQ5MATL Service Manual

Si39-504
3.48 " UA "
Improper Combination of Indoor and Outdoor Units,

Indoor Units and Remote Controller

UA
Remote
Controller
Display
Applicable All models of indoor unit
RXYQ5MA~48MA
Models
Remote controller
Method of A difference occurs in data by the type of refrigerant between indoor and outdoor units.
The number of indoor units is outside of the allowable range.
Malfunction
Detection
Malfunction The malfunction decision is made as soon as either of the abnormalities aforementioned is
Decision detected.
Conditions
Supposed
Causes
Troubleshooting
∗ The number of indoor units that can be connected to a single outdoor unit system depends on
Troubleshooting
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 PC board was not conducted after replacing to spare parts PC board.
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the outdoor
PC board replaced
to spare parts PC
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 type of outdoor unit.
Troubleshooting by Indication on the Remote Controller
YES
NO
NO
NO
The setting after replacing spare
PC board has not been set yet.
Please set as per page 126 .
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)
227