138
Class 5 status
codes
Class 5 status codes generally do not im-
pair the operation of feeding power into the
grid. They will be displayed until the status
code is acknowledged by pressing a key
(the inverter, however, continues working
normally in the background).
- press any key
- error message disappears
Description The inverter stops feeding power into the grid, the display
shows a critical error via a red Operating Status LED.
Remedy Insert new fuse for the solar module ground so that the solar
modules are grounded at the negative or positive pole.
Fault is rectified automatically
If this status code keeps recurring, contact your system installer
474
Short circuit between DC connection and ground (external insulation fault)
High ohm resistor for solar module ground is defective
Description The inverter stops feeding power into the grid, the display
shows a critical error via a red Operating Status LED.
Remedy Insert new high ohm resistor for solar module ground.
Remedy external insulation fault
Fault is rectified automatically
If this status code keeps recurring, contact your system installer
475
DC insulation fault
The insulation value of the DC terminals to the protective earth (PE) is ≤ 500 kilohms
Description The inverter interrupts feed-in operation
Remedy Correct insulation fault
502
DC insulation fault
Description While automatically measuring the insulation, the inverter has
detected an insulation fault to the ground.
Remedy Check the insulation of your photovoltaic system
The status code reappears: contact your system installer
504
No Solar Net communication possible
Description Inverter address issued twice.
Remedy Change inverter address (section: ‘The Setup menu’)
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