Daikin SkyAir RZQ-TA Series, Руководство по обслуживанию

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Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
YES
NO
All indoor
unit remote controllers
of the same refrigerant system
display
U4
.
Are the
indoor-outdoor unit
transmission wirings
normal?
Has the
indoor or outdoor
unit PCB been
replaced, or has the
indoor-outdoor unit
transmission wiring
been modified?
NO
YES
Replace the indoor unit PCB
indicated by the error code
U4 .
Fix the indoor-outdoor
unit transmission wiring.
NO
YES
Reset the power supply.
Press and hold the
RESET
(BS5)
button on the master
outdoor unit PCB for 5 seconds.
∗
The unit will not operate for
up to 12 minutes.
A Go to the next page.