Daikin MKS-T Series Service Manual page 90

Control Specification
Operation pattern
When the power is turned on
Cooling, 1 room operation
Cooling, 2 rooms operation
Stop
4.10.1 Initialization as Power Supply On
The electronic expansion valve is initialized (fully closed) when the power is turned on. Then,
the valve opening position is set and the pressure is equalized.
4.10.2 Pressure Equalizing Control
When the compressor is stopped, the pressure equalizing control is activated. The electronic
expansion valve opens and the pressure is equalized.
4.10.3 Opening Limit Control
The maximum and minimum opening of the electronic expansion valve are limited.
 The maximum electronic expansion valve opening in the operating room: 450 pulses
 The minimum electronic expansion valve opening in the operating room: 64 pulses
The electronic expansion valve is fully closed in the room where cooling is stopped.
4.10.4 Starting Operation Control/Changing Operation Room
The electronic expansion valve opening is controlled when the operation starts, thus preventing
superheating or liquid compression.
4.10.5 Control when the Frequency Changes
When the target discharge pipe temperature control is active, if the target frequency changes to
a specified value in a certain period of time, the target discharge pipe temperature control is
canceled and the target opening of the electronic expansion valve is changed.
85
z : Available
— : Not available
Fully closed when the power is
turned on
Open control when starting
(Control of target discharge pipe
temperature)
Control when the operating room is
changed
(Control of target discharge pipe
temperature)
Pressure equalizing control
— — — —
z z
— —
z z z
—
z z
— —
z z z z
— — — —
Part 4 Functions and Control
SiSG121917E
— —
z
—
z z
z z
z z
— —
(R21729)