Daikin VRV III RXYQ5-54PY1 Service Manual page 296

Si34-601A
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is there any
broken wire or erroneous
wire connection in the
communication wiring of
multi outdoor unit
system?
YES
C/H SELECT is set to "IND".
NO
Cool / heat selection is
unified.
YES
C/H SELECT
is set to
"MASTER."
NO
C/H SELECT
is set to
"SLAVE."
NO
Troubleshooting by Indication on the Remote Controller
NO
YES
NO
YES
Check
YES
and see if the following items
are normal.
External control adaptor for outdoor unit
•Is this PC board energized?
•Does the cool/heat unified address match?
Outdoor unit (unified master unit)
•Is this energized?
•Does the cool/heat unified address match?
YES
Does a
malfunction occur when
the cool / heat selector is
set to "IND?"
YES
Fix the outdoor units multi
connection transmission
wiring and reset power.
Replace the outdoor unit PC
Board (A1P).
Set C/H SELECT to "IND."
The cool / heat unified
address for outdoor units in
outdoor - outdoor unit
transmission is duplicated.
Set the address correctly.
NO
Fix the problem.
NO
Replace external control
adaptor for outdoor unit
Replace the outdoor unit PC
board (A1P).
(V2824)
285