QRC Evap with EEV , system in a pump down . Board is calling but EEV wont open . Tested the eev head ohms out correct. . The eev test pins on the board show 5v dc , which is the board signal to the eev . Last test is the low voltage to drive open the eev , i have none should be 22 / 24v ac . i ordered a board . BUT , question is the ac power to the eev maintained during a call for cooling ? or is it a pulse that is applied only to open the eev ??, then removed. Just checking on my self here , Thanks