InverterFR-A800Verification pending — cross-check with the official manual
FR-A800 TH — Electronic thermal relay function pre-alarm
Alarm — operational, inspection needed
CAUSE
Why does it occur?
- Appears if the cumulative value of the electronic thermal O/L relay reaches or exceeds 85% of the preset level of Pr.9 Electronic thermal O/L relay
- If the specified value is reached, the protection circuit is activated to shut off the inverter output. • Check for large load or sudden acceleration
REMEDY · Step by step
How to fix it?
- • Reduce the load and frequency of operation. • Set an appropriate value in Pr.
- (Refer to page 421.)
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.
Open official manual ↗