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Troubleshooting by Remote Controller Display / LED Display
SiBE28-804
220
Troubleshooting
5.41 “
U5
” Malfunction of Transmission between Indoor Unit
and Remote Controller
Remote
Controller
Display
U5
Applicable
Models
All models of indoor units
Error generation
The error is generated when the microprocessor detects that the transmission between the
indoor unit and the remote controller is not normal over a certain amount of time.
Supposed
Causes
The possible causes are:
Malfunctioning remote controller
Malfunctioning indoor PC board
Outside cause (noise...)
Connection of two master remote controllers (when using two remote controllers).
Troubleshooting
Control by 2 remote
controllers
All
indoor unit
PCB microcomputer
normal monitors
flashing
Using
multicore
transmission wiring
between indoor unit
and remote
controller
Is "
U5
" displayed
constantly?
SS1 of both
remote controllers is
set to MAIN.
Resets
normally when
power supply is turned
off temporarily.
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.
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.
Indoor unit PC board
replacement.
Change to
double-core
independent cable.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Summary of Contents for FHQ100BUV1B x 2
Page 13: ...SiBE28 804 2 ...
Page 19: ...Model Name and Power Supply SiBE28 804 8 General Information ...
Page 29: ...Specifications SiBE28 804 18 Specifications ...
Page 33: ...Wired Remote Controller SiBE28 804 22 Remote Controller 1 2 Installation ...
Page 34: ...SiBE28 804 Wired Remote Controller Remote Controller 23 ...
Page 93: ...Outdoor Unit Fan Speed Control SiBE28 804 82 Functional Description ...
Page 131: ...Test Run and Operation Data SiBE28 804 120 Test Operation ...
Page 251: ...Troubleshooting by Remote Controller Display LED Display SiBE28 804 240 Troubleshooting ...
Page 277: ...PCB Layout SiBE28 804 266 Appendix ...
Page 297: ...RZQ100 140C7 RZQS125 140C7V1B SiBE28 804 286 Removal Procedure ...
Page 311: ...SiBE28 804 iv Index ...