Emerson 48330 User Manual

Chapter 7  Troubleshooting      75 

ACTURA Flex 48330

 

Power System  User Manual 

7.1  Troubleshooting Rectifier 

1. Troubleshoot Rectifier according to LED Indication 

The usual fault symptoms of the rectifier include: power indicator (green) off, 

protection indicator (yellow) on, protection indicator (yellow) blinking, alarm 

indicator (red) on, and alarm indicator (red) blinking.   

Symptom 

Cause 

Suggestion  

No input voltage   

Make sure there is input voltage   

Power indicator (green) off 

Input polarity reversed or input fuse 

blown 

Replace the fuse with a new one of the same 

model or reconnect the input power with 

correct polarity.   

AC input voltage outside the normal 

range 

Ensure the AC input voltage remain within 

normal range   

PFC over-voltage 

Replace the rectifier 

Current sharing function is disabled 

Replace the rectifier 

Rectifier over-temperature protection, which is caused by: 

1. Fan blocked 

1. Remove the obstacle that blocks the fan   

2. Ventilation blocked: the inlet or 

outlet blocked 

2. Remove the objects that blocks the inlet or 

outlet 

3. Ambient temperature too high or 

rectifier inlet too close to an heater 

3. Remove the heater, lower the ambient 

temperature  

Protection indicator (yellow) 

on 

Rectifier not inserted into the slot 

completely  

Insert the rectifier again properly 

Protection indicator (yellow) 

blinking 

Rectifier communication failure 

Check the communication cables 

Alarm indicator (red) on 

Rectifier over-voltage 

Remove the rectifier from the DC power 

system, restart the rectifier, and replace the 

rectifier if over-voltage still occurs. 

Alarm indicator (red) blinking    Fan not running   

Replace the fan 

 

2. Rectifier Current Sharing Unbalanced 

When multiple rectifiers are in parallel connection and the unbalance of current 

sharing among them is bigger than 3%, check if the communication cables are 

correctly connected.