HPT USER MANUAL 30
16
Bus-voltage too
low
Bus-voltage is 20V lower
than standard Bus-voltage
Check the open-circuit voltages of the strings and make sure it is
below the maximum DC input voltage of the inverter. If the input
voltage lies within the permissible range while the fault occurs,
please contact the service.
17 DRM S9 Error DRM switch S9 fault
Check the connection of DRM device. If the DRM device is
connected normally while this fault occurs, please contact the
service.
18 DRM S0 Error DRM switch S0 fault
Check the connection of DRM device. If the DRM device is
connected normally while this fault occurs, please contact the
service.
19
N and PE voltage
exceeds permitted
range
Check if the inverter is securely grounded.
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