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Protect PV.500 Maintenance and Servicing
80000031355 BAL 9 of 14
4.4 Functional Test
i
Always perform a functional test after completing any ser-
vicing work and before starting operation.
Perform the functional test in accordance with the start-up proce-
dure and check the report.
4.4.1 Isolating Solar Inverters
The following are required:
z Multimeter
z Two-pin voltage detector
z Circuit diagram
Contact with voltage!
Risk to life due to electric shock.
The capacitors can continue to carry voltage for quite
some time; terminal X11 (AC control cabinet) will also
remain live.
Switching off Q4 and Q26 (external) does not isolate the
system entirely from the voltage!
The remote signalling lines may still be live even after the
mains and DC have been disconnected!
Î Only trained skilled personnel may isolate the system.
Î Do not touch any live parts.
Î To isolate the system from the voltage, you must dis-
connect the supply lines.
Î Wear personal protective equipment.
Î Switch the PV solar inverter off via the DOU.
Î Switch off Q26 (external).
Î Switch off F60 (DC/AC control cabinet).
Î Q4.1 (DC/AC control cabinet) switches off automatically after a
few seconds.
Î Switch off GCBs (external).
Î Remove all F41 fuses (DC/AC control cabinet).
Î Check that there is no voltage at X41 (DC/AC control cabinet)
and X3 (DC/AC control cabinet).
DANGER
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