Ua" Excessive Number Of Ahus - Daikin ERQ Service Manual

ESIE09-05
UA
3.43 " " Excessive Number of AHUs
UA
Remote
Controller
Display
Applicable
AII AHU models
Models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
∗ The number of AHUs that can be connected to a single outdoor unit system depends on the
type of outdoor unit.
Troubleshooting
Excess of connected AHUs
Defect of outdoor unit PC board (A1P)
Mismatching of the refrigerant type of AHU 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 " " 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 AHU and
outdoor unit
match?
YES
Troubleshooting by Indication on the Remote Controller
YES
NO
NO
NO
: http://splitoff.ru/tehn-doc.html
The outdoor PC board replaced is
wrong, check PC board type.
There are too many AHUs within
the same refrigerant system.
Normal
Matches the refrigerant type of
indoor and outdoor unit.
Replace outdoor unit PC board
(A1P).
(V3169)
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