3-32
SM-18003
TROUBLESHOOTING
Alarm
Code
Incorrect Setting of Unit Model Code
l
The RUN indicator (red) ashes.
l
The indoor unit number (refrigerant cycle number - address number), the alarm code, the model code
1
,
the model name
1
and the number of connected indoor units are displayed on the LCD. The indoor unit
number and the alarm code are displayed on the 7-segment display of the outdoor unit PCB.
Note 1: Except for some models.
This alarm code is displayed in the following condition. Check the unit model code setting (DSW4) of I.U.
PCB after turning OFF the power supply.
Condition Action
The unit model code setting (DSW4) is not set (all pins
are “OFF”), or is set for the incorrect indoor unit type.
Set DSW4 correctly according to the DIP
switch setting in “Installation and Maintenance
Manual“.
Alarm
Code
Incorrect Setting of Unit and Refrigerant Cycle Number
l
The RUN indicator (red) ashes.
l
The indoor unit number (refrigerant cycle number - address number), the alarm code, the model code
1
,
the model name
1
and the number of connected indoor units are displayed on the LCD. The indoor unit
number and the alarm code are displayed on the 7-segment display of the outdoor unit PCB.
Note 1: Except for some models.
This alarm code is displayed in the following condition. Check the settings of the DIP switch (DSW) and the
rotary switch (RSW) after turning OFF the power supply.
Condition Action
The unit No. setting (DSW6 and RSW1) or the
refrigerant cycle No. setting (DSW5 and RSW2)
is set as “64” or more, or more than 2 pins of
DSW5 or DSW6 are set.
a) Unit No. Setting / Ref. Cycle No. Setting Starting
from “1” (recommended)
Set the unit No. and the refrigerant cycle No. from “1”
to “63”. (Setting No. for the 64th unit shall be “0”.)
b) Unit No. Setting / Ref. Cycle No. Setting Starting
from “0”
Set the unit No. and the refrigerant cycle No. from “0”
to “63.” (Setting No. for the 64th unit shall be “63”.)
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