User's Manual

Table Of Contents
Section 5877 User Instructions
Issue AQ, January 15, 2013 Spec. No. 582140000 (Models 802NLDB, 802NLEB and 802NL-B)
Page 6-6 Chapter 6. System Troubleshooting and Repair
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Rectifier Module Fault Symptoms and Troubleshooting
The fault indicators that can be displayed by the rectifier are as follows: Power indicator
(green) off, Protection indicator (yellow) on, Protection indicator (yellow) flashing, Alarm
indicator (red) on, and Alarm indicator (red) flashing. Refer to Table 6-1 for a list of
possible causes and corrective actions.
Symptom
Possible Cause(s)
Suggested Action(s)
Power
Indicator
(Green) Off
No input voltage.
Make sure there is input voltage.
Input polarity reversed or input
fuse blown.
Replace the fuse with a new one of
the same capacity or reconnect the
input power correctly.
Protection
Indicator
(Yellow) On
AC input voltage outside the
normal range.
Ensure that the AC input voltage is
within the acceptable range.
PFC over-voltage.
Replace the rectifier.
Current sharing function is
disabled.
Replace the rectifier.
Rectifier not inserted into the slot
completely.
nsert the rectifier again properly.
Rectifier over-temperature protection, which could be caused by:
1. Fan blocked.
1. Remove any object that may be
blocking the fan.
2. Ventilation blocked (inlet or
outlet).
2. Remove any object that may be
blocking the inlet or outlet.
3. Ambient temperature too high or
rectifier inlet too close to a heat
source.
3. Lower the ambient temperature,
relocate the heat source.
Protection
Indicator
(Yellow)
Flashing
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 the over-
voltage condition still persists.
Alarm
Indicator
(Red) Flashing
Fan not operating.
Replace the rectifier.
Table 6-1
Rectifier Module Troubleshooting