Yaskawa OH1 fault code meaning
Yaskawa / OH1
Series: L7
Heatsink overheat
drive
Meaning: The drive heatsink temperature exceeds the setting of L8-02 or the overheat protection threshold. 0H: exceeds L8-02 (the stop mode can be selected using L8-03). 0H1: exceeds approximately 100°C (the stop mode is coast to stop). Drive internal cooling fan fault (11kW or higher) (detection occurs when L8-32 is set to 1); ambient temperature too high; nearby heat sources; drive cooling fan stops running; short circuit at control circuit terminals +V, -V, AC; control circuit terminal overload; drive internal cooling fan stops running; internal cooling fan locked rotor.
Possible causes
Source: Yaskawa L7 Series Elevator Drive User Manual, Fault Diagnosis P261