Ua" Excessive Number Of Indoor Units - Daikin VRVIII-S Service Manual

SiENBE34-703
3.44 "UA " Excessive Number of Indoor Units
UA
remote control
Display
Applicable
AII indoor unit models
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
! Excess of connected indoor units
Causes ! 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.
Troubleshooting
∗ The number of indoor units that can be connected to a single outdoor unit system depends on
Troubleshooting
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 control
YES
NO
NO
NO
The refrigerant classification has
not been set yet.
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).
(V3169)
175