Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 249 / 333

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9-2. Compressor Backup Operation Setting
<Outline>
If a fault occurs to one of the compressors installed in outdoor unit, follow the procedure described below to
back up the faulty compressor by using the remaining, normal compressor(s).
<Work Procedure>
(1) Turn off the power supply to all the outdoor units connected to the system.
(2) Set the DIP switches of SW06, provided on the interface P.C. board of the outdoor unit with the faulty
compressor, as shown in the table below.
Three-compressor model
SW06
SW06
Bit 1 Bit 2 Bit 3 Bit 4
Bit 1 Bit 2 Bit 3 Bit 4
Factory default setting
When compressor No. 1 (front left) is faulty
When compressor No. 2 (front center) is faulty
When compressor No. 3 (front right) is faulty
Two-compressor model
Factory default setting
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
When compressor No.1 (front left) is faulty
When compressor No.2 (front right) is faulty
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
SW06 SW07 SW09 SW10
SW11 SW12
1 2 3 4 1 2 3 4
SW16 SW17
SW13 SW14
(3) Turn on the power supply to all the units connected to the system.
This is the end of compressor backup operation setting.
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