Hitachi FS3 Series, Service Manual

Page: 210 / 240

4
10
OPTIONAL FUNCTION
Operation
The limitation of
the permissible
outdoor
temperature
area in heating
operation
(factory-set) as
shown in the
right figure is
canceled.
NOTE:
The operation may be OFF due to high outdoor
temperature protection control, since protection control
is not cancelled.
4.2.8.
ALL SEASON COOLING OPERATION
By setting the dip switch, the cooling operation through the
year is available. The cooling operation is continued a low
temperature.
No. 4 of DSW5 is set at OFF before shipment.
Turn OFF the main switch and set the dip switch.
Operation
The limitation of
the permissible
outdoor
temperature
area in heating
operation
(factory-set) as
shown in the
right figure is
canceled.
NOTE:
The operation may be OFF due to high outdoor
temperature protection control, since protection control
is not cancelled.
4.2.9.
NIGHT SHIFT (LOW SOUND) OPERATION
By Changing No.2 of the dip switch, DSW5, the night shift
(low sound) operation can be set. In case of the night shift
operation, the cooling capacity is decreased down to 60%.
The night shift operation shall be applied only in case that
the cooling capacity has the margin to be allowed for the
capacity decrease and the low sound operation is required
especially in the nighttime
n
Outdoor Fan
NOTE:
The maximum rotation is always 100% (rotation ratio)
for the standard unit. (no limitation of the outdoor
temperature)
n
Frequency Range
Outdoor Unit
Capacity (HP)
Minimum
Frequency
Maximum
Frequency
Conditions
5 95 Hz
8 165 Hz
10 177 Hz
16 255 Hz
When
Night Shift
Is Not Set
20
30Hz
325 Hz
Except for the
conditions below
5 50 Hz
8 100 Hz
10 114 Hz
16 140 Hz
When
Night Shift
Is Set
20
30Hz
176 Hz
1. Night Shift
Operation
2. Cooling Operation
3. Outdoor Fan: Below
70%
Converter Frequency of Constant Speed Compressor
Power Supply Frequency
Outdoor Unit
Capacity (HP)
50 Hz 60 Hz
8 50 Hz 60 Hz
10 62 Hz 74 Hz
16
70
™
2 Hz 84
™
2 Hz
20
70
™
3 Hz 84
™
3 Hz
NOTE:
The maximum Frequency for the 8
~
20 HP outdoor uniy
is indicated as; Inverter Fre Converter
Frequency of Constant Speed Compressor.
Suction Air
Temperature
(°C)
Area of
Operation
Stoppage
Outdoor Temperature (°C)
Set No.4 at "ON"
Suction Air
Temperature
(°C)
Area of
Operation
Stoppage
Outdoor Temperature (°C)
Maximum
Rotation
(Rotation Ratio)
Outdoor temperature
(°C)
Set No.2 at "ON"