RDA 400S27.06.2011ver.2 1136.2 Troubleshooting chartThe Control Station does not op-erate when the main switch isswitched on! - See ”6.1.1 Electric fault” on page 109.The bout marker(s) cannot beunfolded! - Check according to ”6.1.1 Electric fault” on page109.- Check according to ”6.1.2 Hydraulic fault” on page109.- Check whether one of the bout marker indicator lampson the Control Station lights.- Check whether the machine is in the low-lift mode.(For safety reasons the bout markers cannot be un-folded in the low-lift mode or at a higher height.)- Check the low-lift switch. Disconnect the switch con-nector from the Workstation and verify correct boutmarker operation.- Check the wing unfolding switch. This switch blocksthe current signal from the bout marker valves whenthe wings of the drill are retracted. This prevents about marker from being unintentionally unfolded inthis position. Disconnect to the switch connector fromthe Workstation and verify correct bout marker oper-ation.- Check the current supply to the two electric valves (A)and (B) in the centre of the top surface of the valveblock. See ”6.1.3 Hydraulic electric valves” on page110. The bout marker valve(s) should receive currentwhen the corresponding indicator lamp lights.The bout marker(s) cannot beretracted! - This is probably caused by contamination in an elec-tric valve. Please note that contamination that causesfaults such as this often is not visible to the naked eye.In this case, replacement of the electric valve is rec-ommended.- It should always be possible to retract both bout mark-ers no matter which setting and indication are ob-served on the Control Station and also when theControl Station has been switched off.
