Rotation Number Control Of Compressor; Cooling Operation - Fujitsu ASUH18LMAS Service Manual

1. Rotation number control of compressor

1-1. Cooling operation

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference
or variation between a set temperature and present room temperature, and controls the operation
rotation number of the compressor.
• If the room temperature is 11 °F (6.0 °C) higher than a set temperature, the operation rotation
number of compressor will attain to maximum performance.
• If the room temperature is 2 °F (1.0 °C) lower than a set temperature, the compressor will be
stopped.
• →hen the room temperature is within the range of +11 °F (6.0 °C) to -2 °F (1.0 °C) of the setting
temperature, the rotation number of compressor is controlled within the range shown in the table
below. However, the maximum rotation number is limited in the range shown in the figure below
based on the indoor fan mode and the outdoor temperature.
• Rotation number of compressor range
Model name
ASUH18LMAS
ASUH24LMAS
1-1. Cooling operation
Minimum frequency
10
10
- (04-1) -
Unit: rps
Maximum frequency
63
80
1. Rotation number control of compressor