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Error Codes: System Malfunctions
ESIE02–01
3–60
Part 3 – Troubleshooting
3
1
3
4
5
4.5
Transmission Error between Indoor Unit and Remote Control (
U5
)
Error code
U5
LED indication
The table below shows the LED indication.
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:
■
Malfunctioning remote control
■
Malfunctioning indoor PCB
■
Outside cause (noise...)
■
Connection of two master remote controls (when using two remote controls).
Troubleshooting
To troubleshoot, proceed as follows:
Operation
HAP (green)
H1P (red)
H2P (red)
Normal
6
8
8
Malfunctioning
—
—
—
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.
All indoor
unit PCB
microcomputer
normal monitors
flashing
Using
multicore
transmission wiring
between indoor unit
and remote
controller
Control by 2 remote
controllers
NO
YES
YES
YES
YES
Resets
normally when
power supply is turned
off temporarily.
NO
SS1 of both
remote controllers is
set to MAIN.
YES
NO
NO
Summary of Contents for Sky Air R-407C
Page 1: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 2: ......
Page 3: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 4: ......
Page 16: ...Introduction ESIE02 01 xii 3 1 4 5...
Page 18: ...ESIE02 01 1 2 Part 1 System Outline 3 1 1 5...
Page 42: ...General Outline Outdoor Units ESIE02 01 1 26 Part 1 System Outline 3 1 1 4 5...
Page 49: ...ESIE02 01 General Outline Indoor Units Part 1 System Outline 1 33 3 1 4 5...
Page 72: ...General Outline Indoor Units ESIE02 01 1 56 Part 1 System Outline 3 1 1 4 5...
Page 86: ...Specifications ESIE02 01 1 70 Part 1 System Outline 3 1 1 4 5...
Page 110: ...ESIE02 01 1 94 Part 1 System Outline...
Page 130: ...Switch Box Layout ESIE02 01 1 114 Part 1 System Outline 3 1 1 4 5...
Page 180: ...PCB Layout ESIE02 01 1 164 Part 1 System Outline 3 1 1 4 5...
Page 182: ...ESIE02 01 2 2 Part 2 Functional Description 3 1 2 5...
Page 204: ...General Functionality ESIE02 01 2 24 Part 2 Functional Description 3 1 2 4 5...
Page 216: ...Overview of the cooling mode functions ESIE02 01 2 36 Part 2 Functional Description 3 1 2 4 5...
Page 232: ...ESIE02 01 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 294: ...Error Codes System Malfunctions ESIE02 01 3 64 Part 3 Troubleshooting 3 1 3 4 5...