Daikin RXYQ96PYDN Service Manual page 443

Troubleshooting by Indication on the Remote Controller
Troubleshooting
428
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Diagnosis Flow 2
Check 3 Check 4
Switch cooling/heating in
a lump.
YES
Setting of
cooling/heating switch
for the external control adaptor
for outdoor unit is "Master
in a lump".
NO
Setting of
cooling/heating switch
for the external control adaptor
for outdoor unit is "Slave
in a lump".
YES
Check if
the normal condition
monitor LED for the outdoor
unit main PC board
blinks.
YES
Check
if the normal
condition monitor LED for
the external control adaptor
for outdoor unit
blinks.
YES
Set
the cooling/heating
switch of the external control
adaptor for outdoor unit to "individual".
Then check if the failure
occurs again.
YES
NO
YES
NO
Check if the
NO
outdoor unit is powered on.
YES
Check
if the power supply
NO
wire for the external control adaptor
for outdoor unit is connected
to 5V supply
line.
YES
NO
SiUS34-801A_b
Set the cooling/heating switch of
the external control adaptor for
outdoor unit to "individual".
The integrated addresses for
cooling/heating within the
outdoor/outdoor transmission are
duplicated. Set the address
again.
Replace the main PC board of
the outdoor unit.
NO
Supply power to the outdoor
unit.
Replace the main PC board of
the outdoor unit.
NO
Connect the power supply wire
for the external control adaptor
for outdoor unit to 5V supply line.
Replace the PC board of the
external control adaptor for
outdoor unit.
Replace the main PC board of
the outdoor unit.
Troubleshooting