Excessive Number Of Indoor Units - Daikin E-Series Service Manual

Troubleshooting for Outdoor Unit
7.33

Excessive Number of Indoor Units

UA
Remote
Controller
Display
Applicable AII indoor unit models
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
396
Excess of connected indoor units
Defect of outdoor unit PCB (A1P)
Mismatching of the refrigerant type of indoor and outdoor unit.
Setting of outdoor PCB was not conducted after replacing to spare parts PCB.
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
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 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
SiAU18-715
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).
(Q0582)
Troubleshooting