MRT/X7/X9 No Buzzer on Boot / E005, E011 

K2 connector on power board sends power to X1 connector on Inverter Board

  • X2 connector on inverter board sends power to M2 on converter board
  • If you get E005 and/or E011 and the PF2 fuse doesn't blow then most likely the PFC board 97661048 is faulty and needs to be replaced No buzzer means that there is an issue with the 400V system; normally a blown PF2 fuse on Power Board, a blown 2AF fuse on Converter Board or a faulty column inverter board. If 600V fuse adjacent to K2 is blown then no power will be sent to Inverter Board connector X1 and thus X2 on Inverter Board to M2 on Converter Board will also have no power.

When troubleshooting a blown 600V fuse at PF3 on Power Board follow these steps:

  • Obtain several PF2 fuses (KLKD8 fuse, manufacturer spec sheet)
  • Disconnect K2 connector on Power Board, install new fuse, and power unit on. If the fuse blows then the Power Board is the culprit.
  • If fuse does not blow then we know that the Power Board is good and the problem is further down the 400V system. In that case re­connect K2 on Power Board and then disconnect X2 at Inverter Board. Power on the unit, then back off and test the fuse. This will determine if the wiring between K2 and X1 is faulty.
  • If the fuse blows at this point then the wiring is bad between K2 and X1. If the fuse doesn't blow then the problem is further down the line. In that case re­connect X2 on Inverter board and power on the unit, then back off, and test the fuse. If the fuse blows then the problem is the Inverter Board.
  • If the fuse doesn't blow then we have to continue further down the 400V system. In that case disconnect M2 on Converter Board and turn on the machine, back off, and test the fuse. If the fuse blows then most likely the gantry wire harness is the culprit. You may have to conduct this test with the gantry in several different positions.
  • If the fuse doesn’t blow then the issue is probably the Converter Board. In that case reconnect M2 on Conver Board and power on the unit, and then back off again. Most likely if you have reached this far into the process the fuse is blown and you have narrowed the issue to the Converter Board

Important: Know what version of inverter and column board that you have!

  • Old Style ­ 97660803, sistered to Hanning Motor Control Board 97660848
  • New Style ­ 97660803, Combined Hanning Motor Control and Inverter Board into one PCB