Alarm codeAL Hu
The power supply voltage is higher than specified, potentially requiring an AC reactor for mitigation. The manual's first action is: “Consider using AC reactor.”
- Model
- RYS MHT260a
- Display shows
- High voltage, overvoltage (AL Hu)
- Type
- Alarm code
- Source
- Manual p. 247
What AL Hu means
High voltage, overvoltage p. 250
Common causes
- High voltage, overvoltage p. 250
- Power supply voltage may be higher than specified. p. 250
- Power-factor correcting capacitor is turned on/off on same line ? p. 250
- Braking resistor is connected ? p. 250
- Braking resistor is disconnected ? p. 250
What to do
- Consider using AC reactor. p. 250
- Consider using external braking resistor (in case of 0.2 [kW] max.). p. 250
- Check the resistance of braking resistor. For resistance of braking resistor, see 10.7. p. 250
- Contact us. p. 250
Before you service the product, read the safety instructions in the manual p. 3.
If AL Hu is still not resolved
- Contact Fuji for special systems or applications such as atomic-energy control, aerospace use, medical use, and traffic control. p. 4 “Customers, who want to use the products introduced in this manual for special systems or devices such as for atomic-energy control, aerospace use, medical use, and traffic control, are requested to consult the Fuji.”
This page summarises what the manufacturer’s manual says about AL Hu; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with RYS. Found a mistake? Report an error.