System Decommissioning; Disconnecting The Inverter; Dismantling The Inverter; Disposal Of The Inverter - CanadianSolar CSI-75K-T40001-E User Manual

8 System Decommissioning

8.1 Disconnecting the Inverter

For maintenance or other service work, the inverter must be switched off.
Proceed as follows to disconnect the inverter from the AC and DC power sources.
Lethal voltages or damage to the inverter will follow if otherwise.
Step 1: Wear personal protective equipment
Step 2: Disconnect the external AC circuit breaker and secure it against reconnection.
Step 3: Rotate the DC switches to the "OFF" position for disconnecting all of the PV string inputs .
Step 4: Wait about 5 minutes until the capacitors inside the inverter completely discharge.
Step 5: Measure the DC current of each PV input string using a clamp meter.
● If the current is less than or equal to 0.5 A, go to the next step.
● If the current is higher than 0.5 A, wait until the solar irradiance decreases and the PV string current
decreases below 0.5 A at night, and then go to the next step.
Step 6: Insert a MC4 wrench into the notch and press the wrench with an appropriate force to remove the DC connector.
Step 7: Ensure that the AC wiring terminals are voltage-free via a multimeter, and remove the AC wires and
communication wires.
Step 8: Install the MC4 waterproof plugs.

8.2 Dismantling the Inverter

Step 1: Refer to "5 Electrical Connection"for the inverter disconnection of all cables in reverse steps.
Step 2: Dismantle the inverter referring to "4 Mechanical Mounting"in reverse steps.
Step 3: If necessary, remove the wall-mounting bracket from the wall.
Step 4: If the inverter will be reinstalled in the future, please refer to "3.4 Inverter Storage"for a proper conservation.

8.3 Disposal of the Inverter

Users take the responsibility for the disposal of the inverter.
Some parts and devices of the inverter, such as the capacitors, may cause environmental
pollution.
NOTICE Do not dispose of the product together with household waste but in accordance with the
disposal regulations for electronic waste applicable at the installation site.

9 Daily Maintenance

Risk of inverter damage or personal injury due to incorrect service!
Always keep in mind that the inverter is powered by dual sources: PV array and utility grid.
Before any service work, observe the following procedure.
1) Disconnect the inverter from the utility grid side first and then PV array;
2) Wait at least 5 minutes after shut down the inverter, for inner capacitors to discharge co
DANGER
mpletely;
3) Verify that no voltage and current existing with appropriate testing devices.
Risk of inverter damage if it is improperly serviced.
Use accessories and spare parts approved by the inverter manufacturer only. Never modify
the inverter or other components of the inverter. The loss of any or all warranty rights may
NOTICE
follow if otherwise.
Any malfunction that may impair the inverter safety operation must be repaired immediately
before the inverter is restarted.
Inverter contains no customer serviceable parts inside. Please contact local authorized
NOTICE
personnel if any service work is required.
Servicing of the device in accordance with the manual should never be undertaken in the
absence of proper tools, test equipment or the more recent revision of the manual with has
been clearly and thoroughly understood.
Information
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8 System Decommissioning