Hitachi RAS-4-HNPE - Service and Maintenance Record (Remote Control)

11. Electrial checks of main parts
447
SMGB0079 rev.0 - 01/2013
11
11.3 Electronic expansion valve
Micro-computer
2-Phase permanent magnetic pulse motor
Pulse signal
Control 0 to 500 pulse by 1 pulse
Refrigerant flow control
Precise control
1. Pulse motor.
2. Needle.
Items Specications
Type UKV series
Refrigerant R410A
Working temperature range -30 °C 70 °C (operation time of the coil: less than 50%)
Mounting direction Drive shaft in vertical direction within an angle of 45 °C as maximum
Flow direction Reversible
Drive method 4-Phase canned motor method
Rated voltage DC12V±1.8 V
Drive condition
63PPS
1.2 phase excitation
Coil resistance (each phase) 46Ω ± 10 (at 20 °C)
Wiring diagram drive circuit and activation
mode
1. Drive circuit.
2. Wiring diagram.
3. Valve.
4 . Close.
5 . Open.
6 . Activation.