Daikin VRV - WII Service Manual page 227

Troubleshooting by Indication on the Remote Controller
Troubleshooting
214
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Has
the indoor
or outside unit PC
board been replaced,
or has the indoor - outside
or outside - outside unit
transmission wiring
been
modified?
NO
All
indoor unit
remote controllers of the
same refrigerant system
display
"U4".
YES
Reset the power supply.
Outside
unit PC board
microcomputer monitor
(HAP) blinks.
YES
Operation
NO
ready lamp (H2P) is
blinking.
YES
Lamp does
not go off for 12 minutes
or more.
NO
Is
indoor - outside unit
and outside unit - outside unit
transmission wiring
normal?
YES
YES
Is indoor
- outdoor and outside -
NO
outside unit transmission
wiring normal?
NO
The
voltage between
NO
terminals L1, L2 and L3
of X1M terminal
is 208~230 V.
YES
The fuse on
the outside unit's PC
board is burnt.
NO
The
secondary voltage
of the transformer is
about 22 V.
YES
YES
NO
SiUS30-604
Push and hold the RESET
button on the master outside
unit PC Board for 5 seconds.
∗ The unit will not operate for
up to 12 minutes.
YES
Replace the indoor unit PC
Board.
Fix the indoor/outside unit
transmission wiring.
NO
Supply 208~230 V.
YES
Replace the fuse.
NO
Replace the transformer.
replacement
Replace outside unit PC
board. (A1P)
Push and hold the RESET
button on the outside unit PC
board for 5 seconds.
Fix the indoor/outside unit
transmission wiring.
Replace the outside unit PC
Board (A1P).
(V2822)
Troubleshooting