According to maintenance manual red light flash 11 times for the fan fault, check the fan, pluck blade, blade rotation is smooth, the fan fault is not obvious, but found that when powered up for the SC plate and the indicator lights on the SS plate on protection, short circuit or doubt SC, SS bad power supply. xr2service manual download site
 xr2service manual download site
Electric block measurement of SC, SS plate Vsus, Vda of no short circuit, preliminary SC, SS plate failure. xr2service manual download site
 xr2service manual download site
Removed the power board independence, the power supply board sub P12 8 and 10 feet, with 10 k resistor P25. 9, 11 feet welding provides a boot instruction, on ~ 220 v of commissioning, found that except the VDA and + 15 v voltage of 0 v with the pressure is normal. xr2service manual download site
 xr2service manual download site
 xr2service manual download site
Measuring D401, D402, D352 no short circuit and voltage output, the suspect T301 didn't start up, MC502 is power supply to MC601, MC201, MC301 public, measure voltage normal MC301 of 14 feet, doubt MC301 bad, finally replace MC301 of commissioning to normal.xr2service manual download site