Daikin FAQ100BVV1B [212/381] Malfunction of transmission between indoor unit and remote control u5

Daikin FCQ35B7V1 [212/381] Malfunction of transmission between indoor unit and remote control u5
Error Codes: System Malfunctions ESIEN05-04
4–6 Part 3 Troubleshooting
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1.3 Malfunction of Transmission between Indoor Unit and remote control (
U5
)
Error code U5
Error generation The error is generated when the microprocessor detects that the transmission between the indoor unit
and the remote control is not normal over a certain amount of time.
Causes The possible causes are:
Q Malfunctioning remote control
Q Malfunctioning indoor PCB
Q Outside cause (noise...)
Q Connection of two master remote controls (when using two remote controls).
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Set one of the remote
controllers to SUB, turn
off the power supply
temporarily, then restart
operation.
Indoor unit PCB
replacement.
Malfunction could be
produced by noise.
Check the surrounding
area and restart
operation.
Change to
double-core
independent cable.
Failure of remote
controller PCB or
replacement of
defective indoor
unit PCB.
YES
YES
YES
YESYES
NO
NO
NO NO
Control by 2 remote
controllers
All indoor
unit PCB
microcomputer
normal monitors
flashing
Using
multicore
transmission wiring
between indoor unit
and remote
controller
SS1 of both
remote controllers is
set to MAIN.
Resets
normally when
power supply is turned
off temporarily.

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