Daikin VRV III REYQ8PY1, Service Manual

Page: 323 / 452

Troubleshooting by Indication on the Remote Controller Si37-701
312 Troubleshooting
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
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Go on to the next page.
LED lamp display
)
Check the detailed malfunction
status in the monitor mode.
(Refer to P226~227 for how to
check.)
Reset the power supply here.
In Check 4,
LED lamp indicates
as follows:
Check if
indoor unit PC board
or outdoor unit PC board has
been replaced. Or check if indoor/
outdoor, outdoor/ outdoor
connecting wires are
normal.
Check
if all the indoor
remote controllers within the
same refrigerant circuit
display “
U4
”.
Check if the
indoor/ outdoor, outdoor/
outdoor connecting wires
are normal.
Check if the
voltage between RS
terminals on the outdoor unit
PC board is 200V.
The fuse on
the outdoor unit PC
board is blown.
Check
if the normal condition
monitor for the microcomputer
(HAP) on the outdoor unit
PC board blinks.
Check if
the LED in preparation
mode (H2P) on the outdoor
unit PC board
blink.
Lights do not
go out for 12 minutes
or more.
Check if
the indoor/ outdoor,
outdoor/ outdoor connecting
wires are normal.
Check if
the operation is normal
with 1 circuit after outdoor/outdoor
connecting wires are
removed.
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.