U5" Malfunction Of Transmission Between Hydro-Box And Remote Controller - Daikin ESIE13-02 Service Manual

Error Codes: System Malfunctions

"U5" Malfunction of Transmission between Hydro-box and Remote Controller

5.6
1
Remote controller
display
Error generation
Supposed causes
3
Troubleshooting
4
5
Caution
Part 4 – Troubleshooting
U5
The error is generated when the microprocessor detects that the transmission between the hydro-box
and the remote controller is not normal over a certain amount of time.
The possible causes are:
Malfunctioning remote controller

Malfunctioning indoor PCB

Outside cause (noise...)

Connection of two master remote controllers (when using two remote controllers).

All
indoor unit PCB
microcomputer normal
monitors
flashing
YES
Is "U5"
displayed
constantly?
YES
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Resets
normally when
NO
power supply is turned
off temporarily.
YES
NO
148
ESIE13-02
NO
Indoor unit PC board
replacement.
Malfunction could be
produced by noise.
Check the surrounding
area and restart operation.
Failure of remote controller
PC board or replacement
of defective indoor unit PC
board.
Problem could be caused
by external factor (noise
etc.) other than
malfunction.