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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
EL 9000 B 15U/24U Series
5.
Service and maintenance
5.1
Maintenance / cleaning
The device needs no maintenance. Cleaning may be needed for the internal fans, the frequency of cleanse is
depending on the ambient conditions. The fans serve to cool the components which are heated by the inherent
dissipation of power. Heavily dirt filled fans can lead to insufficient airflow and therefore the DC input would switch
off too early due to overheating or possibly lead to defects.
Cleaning the internal fans can be performed with a vacuum cleaner or similar. They are located behind the front
panels of the units. For this the device can be opened on the front.
5.2
Fault finding / diagnosis / repair
If the equipment suddenly performs in an unexpected way, which indicates a fault, or it has an obvious defect, this
can’t and must not be repaired by the user. Contact the supplier in case of suspicion and elicit the steps to be taken.
It will then usually be necessary to return the device to the supplier (with or without guarantee). If a return for
checking or repair is to be carried out, ensure that:
•
the supplier has been contacted and it is clarified how and where the equipment should be sent.
•
the device is in fully assembled state (complete cabinet) or in disassembled state (units removed and separate)
and in suitable transport packaging.
•
optional extras such as a digital interface module are included if this is in any way connected to the problem.
•
a fault description in as much detail as possible is attached.
•
if shipping destination is abroad, the necessary customs papers are attached.
5.2.1 Replacing a defect mains fuse
In situations when the master unit suddenly reports an alarm or there is suddenly less power available than expected
from the cabinet, one or probably several fuses could have blown. This situation is very rare, because the blackout
of a unit usually has a more severe cause, like other broken components. However, after finding out which unit is
concerned and having removed and opened it and the first visual inspection shows no obvious damage, it could
suffice to replace a blown fuse to make the cabinet work again.
All units in the cabinet are protected by six 6.3 x 32 mm fuses (T16 A, 500 V, ceramic), located inside. To replace a
fuse the unit must first be disconnected from AC supply, removed from the cabinet (see
)
and then opened. Inside are 3 power modules in black plastic housings, each holding two of the fuses.
Opening the device and replacing the fuses must only be carried out by technically trained
personnel!
Tools required: Torx 10 screwdriver, flat screwdriver (approx. 5 mm), multimeter
►
Step 1: Opening the unit
1.
Switch off at the mains switch and remove AC plug. Disconnect the DC input brackets from the DC bus bar.
2.
Remove unit from cabinet. See
for details.
3.
Remove the top cover of the device by (5 screws at the back, 5 on the front, 7 on each side, all Torx 10)
4.
Remove the plastic cover(s) of the power modules.
►
Step 2: Replacing a defect fuse.
1.
As it is usually unknown which fuse is defect, they should all be checked. The fuses are on the front side
wall (looking from the front of the device) of the power modules and are covered with a soft plastic cap.
2.
Remove the soft plastic cap from the fuse to be tested and carefully prise out the fuse with a flat screwdriver.
3.
Check whether the fuse is intact with a multimeter, and if defective, replace with a similar type (size, values, lag)
4.
Repeat step 2 for all fuses.
Once all fuses have been checked and replaced, and if no other defect is apparent, the device can be reassembled
(step 1 in reverse order).
