Hitachi FS3 Series, Service Manual, Page: 11 / 240

1
TROUBLESHOOTING
3
n
DSW1: Refrigerant cycle no. setting
Setting is required if H-Link is used. Setting position before
shipment are all OFF (Refrigerant cycle No. 0). In the same
Refrigerant Cycle set the same refrigerant cycle no. for the
outdoor unit and for the indoor units as shown below.
Cycle No. 0 1 2 3
Setting
Position
21
2))
21
2))
21
2))
21
2))
Cycle No. 4 5 6 7
Setting
Position
21
2))
21
2))
ON
OFF
21
2))
Cycle No.
8 9 10 11
Setting
Position
21
2))
21
2))
21
2))
21
2))
Cycle No.
12 13 14 15
Setting
Position
21
2))
21
2))
21
2))
21
2))
n
DSW2: Capacity settings
Not setting is required. Each outdoor unit is set as shown
before shipment.
R22
Setting
Position
R407C
Setting
Position
RAS-5FS3
21
2))
RAS-5FSG
21
2))
RAS-8FS3
21
2))
RAS-8FSG
21
2))
RAS-10FS3
21
2))
RAS-10FSG
21
2))
RAS-16FS3
21
2))
RAS-16FSG
21
2))
RAS-20FS3
21
2))
RAS-20FSG
21
2))
n
DSW3: High difference
Setting is required
Œ
Setting Before shipment
Œ
The Outdoor Unit is located higher than
Indoor Unit (0~50m)
Œ
The Outdoor Unit is located lower than
Indoor Unit (0~20m)
21
2))
Œ
The Outdoor Unit is located lower than
Indoor Unit (20~40m)
21
2))
n
DSW4: Test Operation & Service Settings
Setting is required. This dip switch is utilized for test
operation or when servicing operation is performed.
Œ
Setting before shipment
21
2))
Œ
Test Cooling Operation
21
2))
Œ
Test Heating Operation
21
2))
Œ
Enforced Compressor Stop
21
2))
n
DSW5: Optional Function Setting
Setting is required. Set the dip switch according to your
requirements.
Œ
Before shipment
Œ
Power Supply 380/50-60 Hz
21
2))
Œ
Circulator Function of
Heating Thermo OFF 21
2))
Œ
Night Shift (Low noise)
21
2))
Œ
Cancellation of Outdoor
amb. temp. limit of Heating 21
2))
Œ
Cancellation of Outdoor
amb. temp. limit of Cooling 21
2))
Œ
Defrosting condition
change for Cold Area 21
2))
Œ
Power Supply 415/50 Hz
21
2))
Œ
Power supply 220/60Hz
21
2))
n
DSW6: Piping Length
Œ
Before shipment and length < 25 m
21
2))
Œ
25
ˆ
Total length < 50
21
2))
Œ
50
ˆ
Total length < 75
21
2))
Œ
75
ˆ
Total length < 100
21
2))