107
Troubleshooting
1.1.3 Checking by 7-Segment Display
● Simple Checking by 7-Segment Display
1 * Turn on All Indoor Units * All the Indoor Units Connected to the Outdoor Unit
During auto-addressing, the following items can be checked using the
outdoor unit's on-board 7-segment LED display.
(1) Disconnection of power supply to the indoor unit.
(2) Reverse connection of the operating line between the outdoor and
indoor units.
In this case, "03" appears after 30 seconds.
(3) Duplication of indoor unit number. See Alarm Code 35.
Outdoor Unit
Printed
Circuit Board
PCB
2 Turn on the Outdoor Unit
3 Auto-addressing Starts
Normal
Case
(1) The outdoor unit's on-board 7-segment LED display is not indicated.
Abnormal
Case
(2) The outdoor unit's on-board 7-segment LED display indicates the followings if there is something wrong.
(A) Alarm code will be displayed on the 7-segment
when alarm is received from indoor unit in normal mode.
As for the following alarm codes, however, alarm code will be displayed on the 7-segment when
alarm is detected by outdoor unit itself.
● Alarm Code “03” (Abnormal Transmission between Indoor Unit and Outdoor Unit)
● Alarm Code “35” (Incorrect Indoor and Outdoor Unit No. Setting)
(B) Alarm code of smaller indoor unit address No. will be displayed when alarm is received from
multiple indoor units.
(C) The following 7-segment is displayed and flashed every 0.5 seconds.
7-Segment Display
<In Case of Unit No. 63, Alarm Code “01”>
SEG2: Indoor Unit No. (0~63)
SEG1: Alarm Code
Dotted Indication Remarks
SEG1
Alarm Code
Dotted Indication
Indoor Unit No.
SEG2
SEG2
(D) SEG1 and SEG2 are as follows.
SEG1
Alarm Code
SEG2
In the case that 2 refrigerant cycle
groups exist, one refrigerant
cycle group is shown without
dotted indication.
The other refrigerant cycle group
is shown with dotted indication.
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