9-2. Compressor Backup Operation Setting
<Outline>
If a failure occurs to one of the compressors installed in outdoor unit, follow the procedure described below to
back up the
failure
d
compressor by using the remaining, normal compressor.
Note:
The backup operation of compressor cannot be done for MMY-MUP0801*, MMY-MUP1001*,
MMY-
MUP1201*, MMY-MUP1401*,
MMY-MUP14A1*,
MMY-MUP1601*, MMY-MUP1801*
and
MMY-MUP2001*, because only one compressor is installed in these models.
<Work Procedure>
(1) Turn off the power supply to all the outdoor units connected to the system.
(2) Set the DIP switches of SW103, provided on the interface P.C. board of the outdoor unit with the failure
compressor, as shown in the table below.
SW103
Bit 1
Bit 2
Bit 3
Bit 4
Factory default setting
When compressor No.1 (front left) is failured
When compressor No.2 (front right) is failured
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
%0
%0
%0
%0
%0
%0
10
10
10
10
10
10
+%
+%
59
59
59
2
10
0
%
0
%
0
%
(
(
%0
%0
%0
%0
%0
%0
%0
%0
%0
%0
%0
59
59
59
59
59
59
59
%0
.
.
%0
%0
%0
%0
59
59
59
%0
%0
7
7
7
7
7X
7J
7X
7J
7E
7E 5*+'.&
5*+'.&
5*+'.& 7
7 5*+'.&
SW101
ON
1 2 3 4
SW102
ON
1 2 3 4
SW103
ON
1 2 3 4
SW104
ON
1 2 3 4
SW105
ON
1 2 3 4
SW107
ON
1 2
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Summary of Contents for MMY-MUP0801HT7JP
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