Daikin VRV III REYQ8PY1, Service Manual

Page: 342 / 452

Si37-701 Troubleshooting by Indication on the Remote Controller
Troubleshooting 331
Troubleshooting
(V2822)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
For VRV
systems, can the
setting of central controlgroup
No. be made in one and
the same refrigerant
system?
Was
the central
control group No.
for indoor unit
changed?
Make correct setting of the
central control group No.
Check outdoor units to which
the refrigerant system is
connected.
Check whether or not there
are no problems with the
transmission wiring length,
types of cables and wires,
number of units connected,
and others. If no problems,
replace the indoor unit PC
board.
NO
YES
Continued to A
(on the following
page)
YES
Check
the indoor
unit for which
“
UE
” is displayed.
Is the the transmission
malfunction (UE)
caused on
all indoor
units?
Is the
power supply of
the indoor unit, on which
the “
UE
” occurred,
turned ON?
Has
the setting of
central control group No.
been made with the
indoor unit on which
the “
UE
”
occurred?
NO
NO
YES
Can
the setting of
central control group
No be made?
Make sure there are no
hazardous situations, and
then turn ON the power
supply.
NO
NO
YES
YES
NO
YES
Reset the power supplies of
every central equipment.
For the intelligent Touch
controller, register the air
conditioner again while in
DIII-NET test run menu.