Hitachi FS3 Series, Service Manual, Page: 12 / 240

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4
TROUBLESHOOTING
n
DSW7: Compressor Emergency Operation
Setting is not required. All compressor are running except
compressor selected
Œ
Before shipment
21
2))
Œ
Except Compressor No. 1
21
2))
Œ
Except Compressor No. 2
21
2))
Œ
Except Compressor No. 3
21
2))
Œ
Except Compressor No. 4
21
2))
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DSW8: Test Operation & Service Setting II
No setting is required.
Œ
Before shipment
21
2))
Œ
Exchanged Compressor Operation
21
2))
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DSW9: Optional Functions Setting II
No setting is required.
Œ
Before shipment
21
2))
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DSW10: Transmitting Setting
Setting is required for cancellation of end resistance and
when fuse is melted.
Œ
Before shipment, No. 1 pin of DSW10 is
set at ON side 21
2))
Œ
In case that Outdoor Unit quantity in the
same H-Link is 2 or more, set No. 1 pin of
DSW10 at the OFF side from 2
nd
Unit. If
only one Outdoor Unit is used, no setting is
required.
21
2))
Œ
In case of applying high voltage to the
terminal 1, 2 of TB1, the fuse on the PCB
is cut.
Œ
In such a case, first connect the wiring to
TB1 and then turn on #2
21
2))
n
Push switch
Manual defrosting PSW1
for Check
PSW2
PSW3
.