5 Control system
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5
SMGB0077 rev.0 - 01/2013
5.3.4 Automatic cooling/heating operation control
5.3.5 Preventive high-pressure increase control
This function is used to avoid an abnormal condition (alarm: 02) when the outdoor air ow drops due to seasonal winds
blowing against the air outlet. When CMC is enabled in cooling operation, PSC is enabled and Tc is greater than Tc1+4 °C,
operations with forced thermostat disabling are started.
Tc: Outdoor pipe temperature.
Tc1: Outdoor pipe temperature when the PSC is enabled.
PSC enabled: 3.60 MPa.
However, if this occurs more than 6 times during operations, thermostat stoppage is not forced. The cause of the stoppage
will be 13.
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