Daikin R-410A Service Manual page 157

SiBE39-402A
Troubleshooting
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Are the
connectors
between the main
NO
PC board (A1P) and
inverter PC board
(A2P) connected
securely?
YES
The
transmission
wiring between the
YES
outdoor unit PC board
inverter unit is
disconnected.
NO
The
microcomputer
YES
monitor (green) on
the inverter P.C.B
is blinking.
NO
The voltage
between red and
YES
white of X1A on the inverter
unit is the power supply
voltage.
NO
Troubleshooting by Indication on the Remote Controller
Connect transmission wiring and
turn on again.
Fix the disconnection and turn on
again.
Defect of outdoor main PC board
or defect of inverter PC board.
Replace inverter PC board.
When the LC malfunction occur
again, replace control PC board.
Check the noise filter (Z1F) for
disconnection, and check the
power supply wiring or the inverter
PC board.
(V3185)
147