Daikin VRV II RXYQ5MATL, Service Manual

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Si39-504 Troubleshooting by Indication on the Remote Controller
Troubleshooting 227
3.48
“
UA
”
Improper Combination of Indoor and Outdoor Units,
Indoor Units and Remote Controller
Remote
Controller
Display
UA
Applicable
Models All models of indoor unit
RXYQ5MA~48MA
Remote controller
Method of
Malfunction
Detection 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
Decision
Conditions The malfunction decision is made as soon as either of the abnormalities aforementioned is
detected.
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.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
(V2827)
The total
of indoor units
displaying "UA" and
indoor units connected to the
same refrigerant system is
within connectable
number of
unit
∗
Normal
NO
NO
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.
YES
Is the outdoor
PC board replaced
to spare parts PC
board ?
YES
The setting after replacing spare
PC board has not been set yet.
Please set as per page .
NO
YES
Does a malfunction occur?
Replace outdoor unit PC board
(A1P).
Matches the refrigerant type of
indoor and outdoor unit.
NO
YES
Does the
refrigerant type of indoor
and outdoor unit
match?
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