1) Connect power cord to live power source.2) The switch at the power entry module must be turned on (‘|’).3) The power entry module (fuse at main switch) must be set to the same voltage (120V or 240V) as the power source. Refer to Section 4.3.1.4) Check both fuses in power entry module. If either is bad, replace both.5) Check Fuse FU3 located to the left side of the PLC behind the control panel. (See the fuse list at the bottom of this chart.)6) Check Fuse FU4 located at the upper left hand corner of the main PCB.7) Check for 120VAC with a meter at the bottom side of fuse holder FU3 and the gray terminal block. If no voltage is present, recheck the fuses in the power entry module.8) Check OFF pushbutton switch on main panel for short or misconnection. (See Section 7.16.)9) Check ON pushbutton switch on main panel. Using a shorting jumper short the contact and retest.10) Remove the fan panel, verify the green LED located in the upper right hand corner of the power supply is ON. If not, the power supply is bad and must be replaced.