3-13
MAIN PARTS
3.6.2 Electronic Expansion Valve for Indoor Units
Micro-Computer
Pulse Signal
2-Phase Permanent Magnetic Pulse Motor
Control 0 to 2,000 Pulse by 1 Pulse
Refrigerant Flow Control
Precise Control
Pulse Motor
Gear
Driver
Valve
Bellows
Coil
Magnet
DC12V
Wiring
Diagram
Drive
Circuit
4φ2φ
3φ
1φ
M
ON
OFF
Valve
Activation
Close Open
Activation
Procedure
Phase
2φ
4φ
3φ
1φ
12341
Specifications
Items Specifications
Type EDM Type
Refrigerant Used R22 or R407C
Working Temperature Range -30
o
C to 70
o
C (With Coils Not Electrified)
Mounting Direction Drive Shaft in Vertical Direction, Motor Upside and 90
o
in Four Direction
Flow Direction Reversible
Rated Electricity
Drive Method 4-Phase Pulse Motor Method
Rated Voltage DC12V
+1.2V
Drive Condition 100Ω
+250PPS (Pulse Width Over 3mm)
2 Phase Excitation
Coil Resistance
(1 Phase)
150
+10% (at 20
o
C)
Wiring Diagram,
Drive Circuit and
Activation Mode
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