SMA STP 15000TL Service Manual - Manual (Page 7)

Damage to the seal of the enclosure lids in subfreezing conditions
If you open the upper and lower enclosure lids in subfreezing conditions, the seals on the
enclosure lids 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 lid in subfreezing conditions, remove it prior to
opening the enclosure lids of the inverter (e.g. by melting the ice with warm air). Observe the
applicable safety regulations.
Damage to the display or the type label due to the use of cleaning agents
• If the inverter is dirty, clean the enclosure, the enclosure lid, the type label, the display and
the LEDs with a damp cloth only.
2.2 Disconnecting the Inverter from Voltage Sources
Prior to performing any work on the inverter, always disconnect it from all voltage sources as
described in this section. Always adhere to the prescribed sequence.
Destruction of the measuring device due to overvoltage
• Only use measuring devices with a DC input voltage range of 1,000 V or higher.
Procedure:
1. Disconnect the circuit breaker from all three line conductors and secure against reconnection.
2. If the multifunction relay is used, switch off any supply voltage to the load.
3. Test whether there is an acoustic signal.
If an acoustic signals sounds and the display shows an error message that prohibits
disconnecting the ESS, wait until dark. The ESS can only be disconnected once it is dark.
If no acoustic signal sounds and the display does not show an error message, remove the ESS.
4. Wait until the LEDs and the display have gone out.
5. Remove all six screws from the lower enclosure
lid using an Allen key (AF 3).
2 Safety SMA Solar Technology AG
Service Manual 7 STP15-17TL-10-SG-en-10