U8" Malfunction Of Transmission Between Main Remote Controller And Sub Remote Controller - Daikin SkyAir Service Manual

SiBE28-804
5.42 "U8" Malfunction of Transmission between MAIN Remote
Controller and SUB Remote Controller
U8
Remote
Controller
Display
Applicable All models of indoor units
Models
Error generation The error is generated when, in case of controlling with two remote controllers, the
microprocessor detects that the transmission between the indoor unit and the remote controllers
(MAIN and SUB) is not normal over a certain amount of time.
Supposed The possible causes are:
Causes
Troubleshooting
Troubleshooting
Transmission error between MAIN remote controller and SUB remote controller
Connection among SUB remote controllers
Malfunctioning remote controller PC board.
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Controlling
with 2-remote
controller
YES
Both SS-1
switches on remote
controllers are turned
to SUB
YES
Troubleshooting by Remote Controller Display / LED Display
SS-1
NO
switch on remote
controller PC board is
turned to MAIN
YES
Is there
NO
continuity in remote
controller wiring?
NO
NO
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply,
and restart operation.
YES
Turn OFF the power once and
restart operation.
Replace remote controller PC
board if any error is
generated.
Replace the remote controller
wiring.
Turn the SS-1switch of one
remote controller to MAIN.
Turn OFF the power supply,
and restart operation.
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