Valcom VP-324D 300 mA 24-volt Digital Power Supply

if you are getting an ello you code in the display this code indicates that the 24 volt supply on the controller is either damaged or overloaded this blocking code will reset once the problem is corrected if you have a PC with the HTP service software you can monitor the 24 volt power supply which is located on the lower left-hand column of the screen to help troubleshoot the blocking code this number should display between 181 and 255 if the number falls outside this range then the 24 volt supply will not allow the unit to operate until it is corrected to troubleshoot this error first check the line voltage on the incoming power to assure that the voltage is between 108 Volt minimum and 132 volts maximum next check to see if there's an external short which could be drawing the voltage down on the control board by pulling the 10 pin molex off the customer connection board no some models