SMA SC 400HE - Manual (Page 77)

SMA Solar Technology AG 7 Troubleshooting
Operating Manual SC4-63HE-BE-BEN103280 77
7.3 Warnings
No. Description
281 Error text:
Ground fault or SPD defect Error type 1
Failure cause:
The warning alarm chain is interrupted (see circuit diagram).
• Surge arrester damaged.
• Back-up fuse(s) damaged on the grid side or array side (if present).
• The insulation resistance of the PV plant is lower than the set limiting value.
• The transformer's biasing circuit breaker has tripped.
• One of the redundant power supply units is defective.
Corrective measures:
• Check fault signaling of the surge arresters and replace them if necessary.
• Check the protectors' back-up fuse(s), and replace if necessary.
• Check the insulation resistance of the PV plant.
• In the event of an insulation fault, check strings under load-free conditions.
Separate and connect individual strings to determine which string is faulty.
• Check the function of the ground fault monitoring system.
• Switch the biasing circuit breaker of the transformer back on.
• Check the LEDs on the power supply unit and the monitoring module.
• Contact the SMA Serviceline.
283 Error text:
Temperature switch cabinet Error type 1
Failure cause:
The limiting value (parameter TMin or TMax) for the permissible cabinet temperature has
been breached (too high or too low).
Corrective measures:
• Check function of cabinet cooling fans.
• Clean or replace dirty air filters.
• Check ambient temperature, and adjust it if necessary.