InverterFR-E800Verification pending — cross-check with the official manual
FR-E800 E.OHT — Ext TH relay oper
Trip — immediate stop
CAUSE
Why does it occur?
- The inverter output is shut off if the external thermal relay provided for motor overheat protection or the internally mounted thermal relay in the motor, etc. switches ON (contacts open)
- This function is available when "7" (OH signal) is set in any parameter from Pr.178 to Pr.184 (Input terminal function selection)
- This protective function is not available in the initial status. (OH signal is n
REMEDY · Step by step
How to fix it?
• Reduce the load and operation duty. • Even if the relay contacts are reset automatically, the inverter will not restart unless it is reset.
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Summary based on the official Mitsubishi Electric manual. For accurate and complete information, always consult the official manual.
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