Daikin RXYQ5-48MAY1, Service Manual

Page: 243 / 352

Troubleshooting by Indication on the Remote Controller Si39-407
232 Troubleshooting
Troubleshooting
(V2822)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is
indoor - outdoor
and outdoor - outdoor unit
transmission wiring
normal?
Supply 220~240 V.
Replace the fuse.
Fix the indoor/outdoor unit
transmission wiring.
Push and hold the RESET
button on the outdoor unit PC
board for 5 seconds.
Replace the outdoor unit PC
Board (A1P).
YES
YES
NO
YES
Replace the indoor unit PC
Board.
Push and hold the RESET
button on the master outdoor
unit PC Board for 5 seconds.
Fix the indoor/outdoor unit
transmission wiring.
YES
NO
NO
YES
Has
the indoor
or outdoor unit PC
board been replaced,
or has the indoor - outdoor
or outdoor - outdoor unit
transmission wiring
been
modified?
All
indoor unit
remote controllers of the
same refrigerant system
display
"U4."
NO
Outdoor
unit PC board
microcomputer monitor
(HAP) blinks.
NO
NO
NO
Operation
ready lamp (H2P) is
blinking.
Lamp does
not go off for 12 minutes
or more.
Is indoor
- outdoor and outdoor -
outdoor unit transmission
wiring normal?
YES
The fuse on
the outdoor unit's PC
board is burnt.
Replace the transformer.
replacement
Replace outdoor unit PC
board. (A1P)
NO
The
secondary voltage
of the transformer is
about 22 V.
NO
The
voltage between
terminals L1 and N of the
outdoor unit PC board
is 220~240 V.
∗
The unit will not operate for
up to 12 minutes.
Reset the power supply.
YES
YES
YES
NO
YES