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X
A
B
X) Control unit
A) Inverter A
B) Inverter B
C) Inverter C
Fuses in the inverter
• Neutral and grid connection: 1 A
(slow-blow, high switching performance,
6.3 x 30 mm)
Steca item number: 719.498
• Control unit power supply: A
(slow-blow, 5 x 0 mm)
EN
6
Troubleshooting
6.1 Fault messages
If the StecaGrid detects a fault a tool symbol is shown on the display. This sym-
bol appears below right in the Start display or above right in the menu displays
behind the "item number". The StecaGrid can display various fault messages:
•
Notify Service (relay)
•
Notify Service (DC-ABC)
•
Notify Service (NTC-ABC)
•
Notify Service (SDL ABC)
If one of these faults appear, please contact your installer immediately.
There are also messages that have no effect on the primary function of the
equipment. These messages are shown on the display with a flashing exclama-
tion mark. The exact wording of the message can be found on the display under
"Status - Messages". The following messages can appear:
C
•
Inverter ABC grid frequency high
•
Inverter ABC grid frequency low
•
Inverter ABC grid voltage high
•
Inverter ABC grid voltage too high
•
Inverter ABC grid voltage low
•
Inverter ABC grid voltage too low
•
Inverter ABC PV voltage too high
•
Inverter ABC DC/AC protection activated
•
Inverter ABC temperature too high
•
Inverter ABC not synchronised
•
Check inverter ABC (COMM)
These are temporary warnings. You do not need to take any action.
6.2 Troubleshooting
Correcting faults to the inverter(s) is limited to replacing fuses in the control
unit. This work may only be carried out by an installer. There is a 1 A fuse in
the neutral as well as in the grid connection of each inverter (slow-blow, high
switching performance, 6.3 x 30 mm). A A fuse (slow-blow, 5 x 0 mm) pro-
tects the power supply of the control unit. Replacement fuses must always be
the same type as the original fuse and have the same values. Always ensure that,
when replacing a fuse, the AC side of the inverter is made voltage-free. If one of
the fuses of the inverter is faulty we recommend that the corresponding fuse of
the same group is replaced as well. Then check whether a fault with the inverter
caused the fuse to blow and exchange the inverter if necessary.
6.3 Maintenance
Due to its design, the StecaGrid is practically maintenance-free especially as it
does not contain any components which can wear out (ventilators and similar).
Nevertheless, we recommend that regular checks are carried out.
It is particularly important to ensure that the cooling plates on the rear of the
StecaGrid are kept dust-free.
If an inverter is installed in a more or less dusty environment, the inverter will
quickly become dirty as a result of the natural, stronger air current through the
cooling fins.
If this cooling plate becomes dirty, heat dissipation will be impaired and this will
cause the output restriction at lower ambient temperatures than the stated 40 °C
to be reached more quickly and thereby to unnecessarily decrease electricity
generation.
The inverter case can be cleaned with a damp cloth.
Do not use any cleaning agents that can damage the plastic/aluminium compos-
ite case.
731.614 | 10.04
19
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