Figure 5-10: Fuse holder locations
M125HV_111 is equipped with 40 combiner fuses in “pull-out fuse holders, which
support connection of up to 20 strings. The fuse holders are mounted on two
PWBs. The pull-out fuse holders allow safe removal of fuses which are inserted
into a carrier.
Figure 5-10 shows the location of the combiner fuse holders and shield cover,
and Figure 5-11 provides details to remove a fuse; refer to Figure 2-5 for
additional information.
1. Remove the shield cover.
Check the combiner fuses if the power generation of inverter is abnormal using
the following procedure:
1. Check to determine if any string current measurement is zero, which will most
probably indicate a blown fuse.
2. AC and DC power off and wait until LED display turns off.
3. To access the DC side (right) door, use procedure found in Section 5.1.1
4. Based on step 1, check the corresponding fuse locations by pulling out the
fuse holder (Figure 5-11) and checking continuity of the fuse.
5. Replace the fuse if necessary.
6.
Closing the DC side (right) door, using the procedure found in Section 5.1.2
68
Maintenance
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