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229
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Error code
Remote control:
7-segment display:
LED Green Red
Indoor
Outdoor
Content
None
Power source system anomaly
(Power source to remote control)
Stays OFF
1. Applicable model
5. Troubleshooting
FDT, FDTC, FDK series only
Diagnosis Countermeasure
Is the connection of the
remote control's wiring OK?
X (white), Y (black)
Does resetting the
power source return
it to normal?
NO
Does the re-measured
voltage between X and Y
in the indoor terminal block
exceed 15 VDC?
YES
NO
YES
NO
NO
YES
Does the voltage
between X and Y in the
indoor terminal block
exceed 15 VDC?
Remove wire for
the remote control
Power source reset
YES
Correct.
Remote control wire
breakage?
Replace remote control.
Malfunction by temporary
noise
Defective indoor unit
control PCB
Replace.
Remote control wire
breakage?
Replace remote control.
2. Error detection method
3
.
Condition of error displayed
4. Presumable cause
• Remote control wire
breakage/short-circuit
• Defective remote control
• Malfunction by noise
• Broken harness
• Faulty indoor unit control
PCB
Note:
Error code
Remote control:
/Searching IU
7-segment display:
LED Green Red
Indoor
Outdoor
Content
/Searching IU (1)
Keeps flashing
Stays Off
1. Applicable model
5. Troubleshooting
Remote control and indoor units
(In case that
displaying on the remote control
for more than 2 minutes after
power ON)
Diagnosis Countermeasure
NO
YES
NO
/Searching IU is
kept on displaying on the
remote control for more than
2 minutes after power ON
Once turn OFF the breaker
and turn ON it again at 3
minute after power OFF
Is
AC220-240V detected
between L-N at indoor unit
teminal block?
Does it become normal?
WAIT
Breakage of connecting wire.
Noise
Indoor
unit
control PCB anomaly
Replace it.
2. Error detection method
3
.
Condition of error displayed
4. Presumable cause
• Fuse blown
• Anomalous connection of
wire between PCBs
•
Indoor unit control PCB anomaly
• Remote control anomaly
• Breakage of connecting wires
of remote control
Note:
(1)
When anomaly occurs during establishing communication betweeen indoor and outdoor unit, error code E5 is displayed (outdoor red LED
flash 2-time)
In case of E5, the way of troubleshooting is same as above mentioned (except for checking of connecting wire)
When reset the power after E5 occurs, if this anomaly recurs,
/Searching IU is displayed on remote control. If power ON/OFF is
repeated in a short period (within 1 minute),
/Searching IU may be displayed. In such case, please wait for 3 minute
(2)
If any error is detected 30 minutes (10 minutes in case of Eco touch) after displaying
/Searching IU
on the remote control,
INSPECT I/U .
/Searching IU is kept on
after the power breaker OFF.
the display changes to
NO
NO
Does
indoor green LED keep
flashing?
Does
indoor green LED flash
2 times?
Indoor unit control PCB anomaly
Replace it.
Indoor
unit
control PCB
anomaly
Replace it.
Remote control anomaly
Replace it.
Breakage of connecting wires
of remote control
Replace it.
YES
YES
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