1. A module can’t plug in deeply on the surack slot

● When a module is inserted, be sure that the PCBs enter in the superior and inferior black guides.
● Don’t plug-in  the module very strongly! Take the wiring scheme and be sure the module is inserted in the right place. If a module doesn't fit in a position of the rack, the reason is probably that it has different Vin and/or Vout characteristichs respect to this position then with different “polarization keys”, or that the module has been inserted in reverse.

2. The power supply doesn’t turn on

● Verify the input power supply is present and above all is correct.
● If any automatic switches are present, be sure to set the CLOSE position
● Plug out a module: look for the fuse (easily visible in the proximities of the connector) and verify that it’s intact. If it’s opened, see question n.3 below. If instead the fuses are all intact, contact the Advel support.

3. Opened  fuses in one or more modules

● Plug out the overall modules from the rack and look for the fuses (easily visible in the proximities of the connector):  if all the modules have open fuses it means that the power supply has very probably been powered with a superior voltage to the nominal → contact  the Advel technical  assistance.
● If only one module has the fuse opened, there is a remote possibility that the fuse was defective or undersized. So put a new fuse (see DataSheet of the module power supply) and power on the module: if the fuse again becomes opened → contact the Advel technical support and not to try to put a new fuse.

4. FCD led is on (red)

Each of the internal fans is supervised by the FCD device (Fan Control Device).
● FCD Led is on red→ the relative fan works at less than 70% of the rated fan speed, try cleaning the fan with compressed air to remove any dust. If the problem persists, the fan must be replaced.
● FCD Led is red blinking→ the relative fan works at less than 30% of the rated speed, or is stopped. The fan is to be replaced, unless there is an obstacle that stops the fan.( send the module to Advel for repairing).

4. One module has the ALARM TEMP led lighted (red)

If a module, with a working fan, has the ALARM TEMP led on, the causes can be the following:
● working temperature too high (at least >50°C);
● the working temperature is not high, but there is not an adequate heat exchange with outside → check that the fan slots are free (is ideal to leave about 5cm os free space above and below the rack, as indicated in the datasheet);
● output voltage of the module is calibrated much higher than modules connected in parallel, this means the module is working at more than 100% → proceed with the calibration procedure of the module (see the SPF Datasheet)
● if none of the above points solves the problem, the internal thermostat may have been damaged → send the module to Advel for repairing

6. RMT in alarm after the load is introduced

if a too elevated load is introduced, the power supply goes in “protection state”, lowering its nominal output voltaget, and accordingly RMT goes in alarm state. So, be sure to use a load suitable to the capacity of the power supply. Verify that the inrush current of the load is not excessive.

7. Giving power to the rack without load and then giving a load, all is ok. But powering on the power supply with the load already connected, the power supply turn on and off repeatedly.

I’t’s a typical problem of undersized power source: be sure to use a suitable power supply (20% more at least than the nominal power of the power supply).

8. If a module is unplugged, what alarms in the rack?

If one or more modules are unplugged from the rack, there are always alarm on both RMT and FCD contacts of the rack.

9. RMCB gives alarm even if the batteries are connected