Night Shift (Low Sound) Operation - Hitachi RPI-0.8FSG1 Service Manual

OPTIONAL FUNCTION
(4.3 Outdoor Unit)

4.3.10 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.
(1) Outdoor Fan
NOTE:
The maximum rotation is always 100% (rotation ratio) for the standard unit.
(No limitation of the outdoor temperature)
(2) Frequency Range
When
Night Shift
is not Set
When
Night Shift
is Set
Converted Frequency of Constant Speed Compressor
Outdoor Unit Capacity
(HP)
10
16
20
24
30
NOTE:
The maximum frequency for the 8 to 30HP outdoor unit is indicated as;
Inverter Frequency + Converted Frequency of Constant Speed Compressor.
4-32
Outdoor Unit Minimum
Capacity (HP) Frequency
5
8
10
16 30Hz
20
24
30
5
8
10
16 30Hz
20
24
30
Power Supply Frequency
50Hz
8 50Hz
62Hz
70 x 2Hz
70 x 3Hz
70+100 x 2Hz
70+140 x 2Hz
Maximum
Frequency
95Hz Except for the Conditions Below
165Hz
177Hz
255Hz
325Hz
385Hz
465Hz
50Hz (1) Night Shift Operation
100Hz (2) Cooling Operation
114Hz (3) Outdoor Fan: Below 70%
140Hz
176Hz
211Hz
255Hz
60Hz
60Hz
74Hz
84 x 2Hz
84 x 3Hz
84+120 x 2Hz
84+168 x 2Hz
Conditions