SMA STP 60-US-10 Installation - Manual (Page 44)

4 Service SMA Solar Technology AG
44 STP60-10-IA-xx-10 Installation Guide
Table 4.5 Events caused by the self-test
4.2 Maintenance
Ensure that the heat sink at the rear of the inverter is not
covered.
Clean the contacts of the PV load-break switch once a year.
Clean by cycling the switch to on and off positions ten times.
The PV load-break switch is located at the bottom of the
inverter.
For correct operation and a long service life, ensure free air
circulation for the following areas:
• around the heat sink at the top and side of the inverter
where the air exhausts, and
• to the fan at the inverter base.
To clear obstructions, clean using compressed air, a soft
cloth, or a brush.
356–
361 Transistor and relay test failed or inverter
relay has failed (contact assumed
welded). Contact the Service. - - -
366 Residual-current monitoring unit (RCMU)
self-test failed. Contact the Service. - - -
ID Description Measure DGO Hotline PV
Temperature of the heat sink can exceed 70°C.