Daikin RXYQ5-48MAY1 Service Manual page 246

Si39-407
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the
outdoor units multi
connection transmission
wiring normal?
YES
Is the
indoor / outdoor unit
transmission wiring
normal?
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
NO
YES
NO
YES
Check
YES
and see if the following items
are normal.
Outdoor unit outside control adaptor
•Is there continuity?
•Does the cool/heat unified address match?
Outdoor unit (unified master unit)
•Is there continuity?
•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.
Fix the indior / outdoor unit
transmission wiring.
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 the outdoor unit
outside control adaptor.
replacement
Replace the outdoor unit PC
board (A1P).
(V2824)
235