Daikin VRV III REYQ8PY1 Service Manual page 323

Troubleshooting by Indication on the Remote Controller
Troubleshooting
312
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the detailed malfunction
status in the monitor mode.
(Refer to P226~227 for how to
check.)
In Check 4,
LED lamp indicates
NO
as follows:
YES
Check if
indoor unit PC board
or outdoor unit PC board has YES
been replaced. Or check if indoor/
outdoor, outdoor/ outdoor
connecting wires are
normal.
NO
Check
if all the indoor
NO
remote controllers within the
same refrigerant circuit
U4
display " ".
YES
Reset the power supply here.
Check
if the normal condition
NO
monitor for the microcomputer
(HAP) on the outdoor unit
PC board blinks.
YES
Check if
the LED in preparation
NO
mode (H2P) on the outdoor
unit PC board
blink.
YES
Lights do not
YES
go out for 12 minutes
or more.
NO
Check if
the indoor/ outdoor,
NO
outdoor/ outdoor connecting
wires are normal.
YES
Check if
the operation is normal
NO
with 1 circuit after outdoor/outdoor
connecting wires are
removed.
YES
Check if the
YES
indoor/ outdoor, outdoor/
outdoor connecting wires
are normal.
NO
Check if the
NO
voltage between RS
terminals on the outdoor unit
PC board is 200V.
YES
The fuse on
YES
the outdoor unit PC
board is blown.
NO
Si37-701
Go on to the next page.
LED lamp display
( )
Press the rewiring button on the
main PC board of the master
outdoor unit. Keep pressing for 5
seconds or more. (Operation does
not start for a maximum 12
minutes.)
Replace indoor unit PC board.
Correct the connecting wires.
Correct the voltage (200V).
Replace the fuse.
Replace the outdoor unit PC
board.
Press the rewiring button on the
main PC board of the outdoor unit.
Keep pressing for 5 seconds or
more.
Correct the connecting wires.
Replace the main PC board of
outdoor unit.
Fix DIII Net extension adapter.
Troubleshooting