Hitachi RAS-(4-12)HNP(1)(E) - Electronic Expansion Valve

11 Electrical checks of
main parts
462
SMGB0087 rev.0 - 12/2013
11.3 Electronic expansion valve
Micro-computer
2-phase permanent magnetic
pulse motor
Control 0 to 500 pulse by 1 pulse
Refrigerant ow control
Precise control
Pulse signal
1. Pulse motor.
2. Needle.
Items Specications
Type UKV series
Refrigerant R410A
Working temperature range -30 ºC 70 ºC (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 ºC)
Wiring diagram drive circuit and
activation mode