Vertiv™ NetSure™ HVT F02 CK1 Power System User Manual
47
Fault cause
1. Internal short circuit of rectifier
The rectifier will automatically exit the system in case of internal short circuit.
2. Damage to partial rectifier
In case of damage to partial rectifiers, if the remaining undamaged rectifiers are able to meet the power supply requirements of
loads, just turn off the AC input switches of the damaged rectifiers.
3. Rectifier output overvoltage
The overvoltage of a single rectifier will not cause the overvoltage protection of all rectifiers. However, if overvoltage protection
occurs to all rectifiers, the system cannot recover automatically.
Treatment: turn off the AC input switches of all rectifiers and remover the rectifier to disconnect it. At this time, the system
voltage should be below 378V. Then insert rectifier one by one and turn on the AC input switches to observe the output current
of it. When the AC input MCB of a certain rectifier is switched on, its output current is obviously bigger than that of the others.
When the system voltage is higher than 378V, the rectifier with bigger output must be faulty. Replace it. If all the rectifiers show
the same symptom, you must turn off the monitoring and rectifiers and then restart the rectifiers.
4.7
Replacing Rectifier
NOTE!
Rectifier surface temperature may be high, be careful when you pull out the rectifier.
When rectifier is faulty, see the following procedures to replace:
1. Check the new rectifier to see whether there is any damage.
2. Disconnect the AC input MCB of the rectifier and loosen the fixing screws on the panel of the rectifier. See Figure 4.6.
Figure 4.6 Rectifier position slide switch
3. Grasp the handles, pull the module out of the cabinet slowly until it stops, and put the slide switch on
position. Then pull out
the rectifier completely. Observe whether there is an appropriate controller alarm.
4. Disconnect the rectifier switch, put the slide switch on
position, grasp the handles, and push the rectifier into cabinet slowly
until it stops.
5. Put the slide switch on position. And then push the rectifier to the bottom until the rectifier panel is on the same level as the
rectifier cabinet panel.
6. Push the handle to the front panel.
7. Tighten the fixing screws on the handle to fix the rectifier on the cabinet.
8. Close the AC input MCB of rectifier.
The power indicator of rectifier will light up after a short delay, and then the fan operates. The alarm stops.
