Electronic Expansion Valve For Indoor Units - Hitachi FSG Series Service Manual

3
MAIN PARTS
12
3.3.2.

ELECTRONIC EXPANSION VALVE FOR INDOOR UNITS

Micro-Computer
2-Phase Permanent Magnetic Pulse Motor
Control 0 to 2,000 Pulse by 1 Pulse
Refrigerant Flow Control
Precise control
Items
Type
Refrigerant Used
Working Temperature Range
Mounting Direction
Flow Direction
Rated Electricity
Drive Method
Rated Voltage
Drive Condition
Coil Resistance (each Phase)
Wiring Diagram, Drive Circuit And
Activation mode
Pulse Signal
Drive shaft in Vertical Direction, Motor Upside and 90° in Four Direction
Pulse Motor
Gear
Driver
Specifications
EDM Type
R22 or R407
-30 °C ~ 70 °C (With Coils not Electrified)
Reversible
4-Phase Pulse Motor
DC12V–1.2V
100W – 250PPS (Pulse Width Over 3mm)
2 Phase Excitation
150W – 10% (at 20 °C)
Proce-
dure
Phase
ON
OFF
Wiring
Diagram
Valve
Drive
Activa-
Circuit
tion
Magnet
Coil
Bellows
Valve
EDM Type
Close Open
Activation Mode