Alarm troubleshooting
1,997 real controller alarms with step-by-step diagnostic trees — filter by brand and unit, or type the code straight from your screen.
Alarm Z52 (Battery fault) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series3 steps→Z53Alarm Z53 (CNC overheat) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series2 steps→Z55Alarm Z55 (RIO communication stop) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series3 steps→Z57Alarm Z57 (System warning) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z58Alarm Z58 (ROM write not completed) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series2 steps→Z59Alarm Z59 (Acc/dec time cnst too large) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series3 steps→Z60Alarm Z60 (Fieldbus communication error) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z64Alarm Z64 (Valid term soon to be expired) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series3 steps→Z65Alarm Z65 (Valid term has been expired) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series3 steps→Z67Alarm Z67 (CC-Link communication error) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z70Alarm Z70 (Abs data error / Basic position lost) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series5 steps→Z71Alarm Z71 (Abs encoder failure) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z72Alarm Z72 (Position check error) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z73Alarm Z73 (Absolute position data warning) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z81Alarm Z81 (R-pos adjustment data lost) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series2 steps→Z82Alarm Z82 (3D machine interference/No machine model) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→Z83Alarm Z83 (NC started during SP rotation) Diagnostic Tree
Mitsubishi·M70/M700/M800/M80 Series1 step→