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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.
F
a
c
When compressor No. 1 (front left) is faulty
When compressor No. 2 (front center) is faulty
When compressor No. 3 (front right) is faulty
F
a
c
When compressor No.1 (front left) is faulty
When compressor No.2 (front right) is faulty
(3) Turn on the power supply to all the units connected to the system.
This is the end of compressor backup operation setting.
Three-compressor model
o t
y r
d
e
a f
u
t l
s
e
t t
n i
g
Two-compressor model
o t
y r
d
e
a f
u
t l
s
e
t t
n i
g
SW06
SW07
1 2 3 4
1 2 3 4
SW11
SW12
1 2 3 4
1 2 3 4
SW16
SW17
1 2 3 4
1 2 3 4
SW06
Bit 1
Bit 2
O
F
F
O
F
F
ON
OFF
OFF
ON
OFF
OFF
SW06
Bit 1
Bit 2
O
F
F
O
F
F
ON
OFF
OFF
ON
– 236 –
SW09
SW10
1 2 3 4
1 2 3 4
SW13
SW14
1 2 3 4
1 2 3 4
Bit 3
Bit 4
O
F
F
O
F
F
OFF
OFF
OFF
OFF
ON
OFF
Bit 3
Bit 4
O
F
F
O
F
F
OFF
OFF
OFF
OFF
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Troubleshooting
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