Emerson 48330 user manual Troubleshooting Rectifier, Symptom Cause Suggestion

Chapter 7 Troubleshooting 75

Chapter 7 Troubleshooting

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.

Table 7-1 Troubleshooting

Symptom		Cause		Suggestion
		No input voltage		Make sure there is input voltage
Power indicator (green) off		Input polarity reversed or input fuse		Replace the fuse with a new one of the same
				model or reconnect the input power with
		blown
				correct polarity.
		AC input voltage outside the normal		Ensure the AC input voltage remain within
		range		normal range
		PFC over-voltage		Replace the rectifier
		Current sharing function is disabled		Replace the rectifier
Protection indicator (yellow)		Rectifier over-temperature protection, which is caused by:
		1. Fan blocked	1. Remove the obstacle that blocks the fan
on
		2. Ventilation blocked: the inlet or		2. Remove the objects that blocks the inlet or
		outlet blocked		outlet
		3. Ambient temperature too high or		3. Remove the heater, lower the ambient
		rectifier inlet too close to an heater		temperature
		Rectifier not inserted into the slot		Insert the rectifier again properly
		completely
Protection indicator (yellow)		Rectifier communication failure	Check the communication cables
blinking
				Remove the rectifier from the DC power
Alarm indicator (red) on		Rectifier over-voltage		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.

ACTURA Flex 48330 Power System User Manual