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11 Electrical checks of
main parts
11.3 Electronic expansion valve
Micro-computer
2-Phase permanent magnetic pulse motor
Control 0 to 500 pulse by 1 pulse
Refrigerant flow control
Precise control
Items
Applicable to the models
Type
Refrigerant
Working temperature range
Mounting direction
Flow direction
Drive method
Rated voltage
Drive condition
Coil resistance (each phase)
Wiring diagram, drive circuit and activation
mode
447
SMGB0060 rev. 1- 12/2010
Pulse signal
For the main cycle of: For IVX RAS-(4-12)H(V)RNM(1)(E) and ES RAS-(4-10)H(V)RNS(1)E
UKV(10.0 USRT) series/UKV (5.0USRT) series for MVB
R410A
-30 °C ~ 65 °C (operation time of the coil: less than 50%)
Drive shaft in vertical direction within an angle of 45 °C as maximum
Reversible
4-Phase canned motor method
DC12V±1.8 V
83PPS (pulse width at ON: 36 mm sec, OFF: 60 mm sec) 1.2 phase excitation
46Ω ± 10% (at 20 °C)
1. Drive circuit.
2. Wiring diagram.
3. Valve.
4 . Close.
5 . Open.
6 . Activation.
1. Pulse motor.
2. Needle.
Specifications
11
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Troubleshooting
