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Maintenance/Troubleshooting
9.5
Replacing the string fuse (XL version)
DANGER
Risk of fire if the fuse holder is disconnected under load!
The connection terminals and fuse holder can be destroyed by arcing if disconnected or if the fuses
are removed.
Shutdown sequence:
1.
Switch off the PV generator using the DC isolator switch.
DANGER! The DC cables are still live!
2. Check that there is no current in any of the DC cables using a clip-on ammeter.
3. Only open the fuse holder once you have established that there is no current in the DC cables.
Checking the string fuses
Use a clip-on ammeter to check the current flow in each DC string.
–
If there is no current flow, the string fuse must be checked:
1.
The shutdown sequence in the preceding warning has been carried out.
2. Open the housing and secure the door with the latch lever.
3. Open the relevant DC fuse holder.
4. Use a multimeter to check the DC fuse for flow.
–
Flow: Reinsert DC fuse in the fuse holder and close.
–
No flow: Replace DC fuse.
5. Check for other sources of interference on the DC string (fault on cable/module(s) / DC plugs (XL version),
polarity and design)
Replacing the string fuses
6. Remove defective DC fuse from the fuse holder.
Note: DC fuses can be ordered from the KACO customer service team
(dimensioning: see section "Dimensioning the string fuse (XL version)" on
page 23).
7.
Insert DC fuse of the same type into the fuse holder.
8. Ensure the DC fuse holder is completely closed after fitting.
»
Fuse holders are fitted with fuses. Close the housing door and switch on
the inverter as described in section 7.10 auf Seite 30 onwards.
9.6
Shutting down for maintenance and troubleshooting
DANGER
Lethal voltages are still present in the terminals and cables of the unit even after the unit has
been switched off and disconnected.
Severe injuries or death will occur when touching the cables and terminals in the inverter.
Only appropriately qualified and authorised electricians may open and maintain the inverter.
›
Observe all safety regulations and the current technical connection specifications from the relevant
power supply company.
Shutdown sequence
1.
Switch off the grid voltage by turning off the external circuit breakers.
2. Disconnect the DC side depending on the device version:
–
XL device version: Switch off the DC supply using the DC isolator switch.
Operating Instructions KACO blueplanet 29.0TL3
2
1
Figure 46: Replace DC fuse
EN
Page 51
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Troubleshooting
