Troubleshooting steps
Check safety switches, verify safety interlocks
Heavy Equipment Codes
Komatsu E77 – Safety system fault
Safety system fault
Details
Komatsu E77 error on Construction, Mining equipment indicates safety system fault. Safety switch activated, safety interlock open. Check safety switches, verify safety interlocks.
Error typesafety
MeaningSafety system fault
Typical causesSafety switch activated, safety interlock open
SolutionsCheck safety switches, verify safety interlocks
SeverityCritical
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KomatsuE77
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What does E77 mean on Komatsu equipment?
E77 on Komatsu Construction, Mining equipment indicates safety system fault. Safety switch activated, safety interlock open.
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