Control Specification SiUS04-924
Function and Control 39
3.11.7 Control when frequency is changed
When the target discharge pipe temperature control is active, if the target frequency is changed for
a specified value in a certain time period, cancel the target discharge pipe temperature control and
change the target opening of the electronic expansion valve according to the shift.
3.11.8 Target Discharge Pipe Temperature Control
Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger
temperature, and adjust the electronic expansion valve opening so that the actual discharge pipe
temperature becomes close to that temperature. (Indirect SH control using the discharge pipe
temperature)
Determine a correction value of the electronic expansion valve compensation and drive it according
to the deflection of the target discharge temperature and actual discharge temperature, and the
discharge temperature variation by 20 seconds.
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