Komatsu — 3.4 ELECTRONIC MONITORING AND CONTROL SYSTEM ECS

OPERATION 3.4 ELECTRONIC MONITORING AND CONTROL SYSTEM ECS Fault and Information Message List GROUP 1 Fault Message Texts of message pages No. 500 - 751 Fault No. 500: (503) *1) $h: Start blocked through main Shut-Off (gate) valve Help: Limit switch S31 not closed. - Check for broken cables to switch S31. Fault No. 506: (509) $h: Start of engine 1 blocked due to contamination of pump 1 Differential pressure switch B5-1 not closed or B10A-1 closed - Check cables to differential pressure switch B5-1 and chip indicator B10A-1. Help: Fault No. 512: (515) $h: Help: Fault No. 518: (521) $h: Shut down of engine 1: coolant pressure at low idle too low Help: Message through sensor B56-1. Fault No.

524: (527) $h: High pressure filter 1 or pump 1 restricted. Stop the engine 1 Action required No Shutdown Differential pressure switch B5-1 not closed or chip indica- tor B10A-1 closed - Clean or replace filter element. - Check pump Help: Fault No. 530: (533) $h: Faulty monitor channel coolant pressure of engine 1 at high idle Help: Sensor B41-1 shows inadmissible values. - Check sensor and cables. *1) Numbers in brackets are the message page numbers of the second language. 159