Daikin VRVIII-S, Service Manual

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SiENBE34-703 Troubleshooting by Indication on the remote control
Troubleshooting 175
3.44 “
UA
” Excessive Number of Indoor Units
remote control
Display
UA
Applicable
Models AII indoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes ! 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.
Troubleshooting
∗
The number of indoor units that can be connected to a single outdoor unit system depends on
the type of outdoor unit.
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V3169)
Caution
The total
of indoor units
displaying "UA" and
indoor units connected to
the same refrigerant system is
within connectable number
of unit*
Normal
There are too many indoor units
within the same refrigerant
system.
Push and hold the RESET
button on the outdoor unit
PC board for 5 seconds.
Is the outdoor PC
board replaced to
spare parts PC
board?
The refrigerant classification has
not been set yet.
Does a malfunction occur?
Replace outdoor unit PC board
(A1P).
Matches the refrigerant type of
indoor and outdoor unit.
Does the
refrigerant type of
indoor and outdoor
unit match?
YES
YES
YES
YES
NO
NO
NO
NO