8 Troubleshooting
208
SMGB0087 rev.0 - 12/2013
8.1 Initial troubleshooting
8.1.1 Checking by means of the 7-segment display
Simple checking procedure by means of the 7-segment display
1 Turn on all the indoor units which are connected to the outdoor unit.
2 Turn on the outdoor unit
3 Auto-addressing starts. (Outdoor unit printed circuit board PCB1).
During the auto-addressing, you can check the following items by means of the 7-segment display of the outdoor unit.
• Disconnection of the power supply to the Indoor Unit.
• Disconnection of the operating line between the outdoor and the indoor units.
• Duplication of the Indoor Unit number.
• Normal case:
The 7-segment display of the outdoor unit is not indicated.
• Abnormal case:
If there is something wrong, the 7-segment display of the outdoor unit displays the following indications:
Cause Indication Remarks
A. The indoor units are not supplied with power.
03
continues to ash after 30 seconds.
B. Disconnection of the operating line between the outdoor units
and the indoor units.
03
continues to ash after 30 seconds.
C. Duplicated settings of the indoor unit number on the rotary
switch RSW (Refer to the section”8.2.3 Troubleshooting by alarm
code for the outdoor and indoor units”, see the description of the
alarm code “35”).
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