SMA SB 1.5-1VL-40 Service Manual - Manual (Page 29)

7 Opening the Inverter
If you have to open the inverter enclosure lid for repairs or replacement, proceed as described in
the following.
Damage to the seal of the enclosure lid in sub-zero conditions
If you open the enclosure lid in sub-zero conditions, the sealing of the enclosure lid can be
damaged. This can lead to moisture entering the inverter.
• Do not open the inverter at ambient temperatures lower than -5°C.
• If a layer of ice has formed on the seal of the enclosure lid in sub-zero conditions, remove it
prior to opening the inverter (e.g. by melting the ice with warm air). Observe the applicable
safety regulations.
Procedure:
1.
Danger to life due to high voltages
• Disconnect the inverter from all voltage sources (see Section 2.1, page 5).
• Wait five minutes until the capacitors have discharged.
2. To prevent water or dust entering the interior of the inverter, clean and dry the lid prior to
removal.
3. Unscrew all four enclosure lid screws using a Torx screwdriver (TX25) and store safely.
4. Carefully remove the enclosure lid.
5.
Damage to the inverter due to electrostatic discharge
The internal components of the inverter can be irreparably damaged by electrostatic
discharge.
• Ground yourself before touching any component.
6. Perform the repair or replacement.
7. Replace the enclosure lid with the four screws onto the enclosure and hold in place.
8. Tighten all four screws using a Torx screwdriver (TX25) crosswise (torque: 6 Nm).
9. Recommission the inverter (see Section 8, page 30).
7 Opening the Inverter SMA Solar Technology AG
Service Manual for Installers 29 SB15-25-SG-en-10