Installation Instructions - KACO new energy, Inc.

Maintenance/Troubleshooting
9.5 Messages on the display and the “Fault” LED
Many fault signals indicate a fault in the grid. They are not operational faults of the inverter. The minimum triggering
levels are determined by standards. The inverter must switch off if the permitted values are undershot or exceeded.
9.5.1 Display of status and fault messages
Display
FS (fault status)
OS (operating status)
Fault LED (red)
ON
OFF
• Fault signal relay has switched.
• Feed-in was ended due to a fault.
• The fault signal relay deenergizes again.
• The inverter feeds back into the grid again
after a country-specific time period.
On the display you can find details regarding the fault or operating status or the data that was recorded through the
RS485 interface.
9.5.2 Status and fault signals
The following table lists the possible status and fault signals that the inverter shows on the LCD and the LEDs.
Status Display Explanation Action By
OS 1 Waiting for feed-in Self test: Grid parameters and generator
voltage are being checked.
OS 2 Generator voltage
too low
Generator voltage and power are too
low; situation before transition into
night shutdown
OS
OS
7
75
Self-test
Self-test
Checks the shutdown of the power
electronics as well as the line relay
before feed-in mode. The self-test
consists of three successive individual
tests with the status 7, 75 and 8.
- -
- -
- -
OS 8 Self-test
FS 10 Temperature in
unit too high
In case of overheating, the inverter
switches off. Possible causes:
• Ambient temperature too high
• Fans covered
• Inverter defect
OS 11 Measured values Power limitation: If the generator
power is too high, the inverter limits
itself to the maximum power (e.g. in
the midday hours if the generator has
been too largely dimensioned).
Cool off the vicinity
of the inverter.
Uncover the fans.
Notify your authorised
electrician.
O
O
E
- -
Tabelle 6: Operating states and fault messages on the display
OS = operating status, FS = fault status;
O = Action of the operator
E = The indicated work must only be carried out by an authorised electrician.
K = The indicated work must only be carried out by a service employee of KACO new energy, Inc.
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