Daikin RXYQ96PYDN Service Manual page 453

Troubleshooting by Indication on the Remote Controller
Troubleshooting
438
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Diagnosis Flow 7
Check 3 Check 4
Is the wiring between
the BS units correct?
YES
Diagnosis Flow 8
Check 3 Check 4
Is the connection
wiring between the indoor
unit and the BS unit
correct?
YES
Diagnosis Flow 9
Check 3 Check 4
Is the BS
unit connected by heat
pump equipment?
YES
Diagnosis Flow 10
Check 3 Check 4
Is the wiring
multi-connected?
YES
Aren't
heat pump and heat
recovery equipment
mixed?
YES
NO
NO
NO
NO
NO
SiUS34-801A_b
Correct the connection wiring.
Replace the BS unit PC board
concerned.
Correct the connection wiring.
Replace the indoor unit or BS unit
PC board.
Replace PC board.
Remove the BS unit.
Replace PC board.
Replace PC board.
Correct the connection wiring.
Troubleshooting