If your inverter is equipped with a communication component, then numerous measuring channels
and messages can be transmitted for diagnosis.
Measuring channel Description
dZac Change of the grid impedance
Error Identication of the current disturbance/error
E-total Total amount of feeding-in energy
Event-Cnt Number of events that have occurred
Fac Grid frequency
h-On Total number of operating hours
h-Total Total number of operating hours for feeding operations
Iac Grid current
Ipv DC current
Mode Display of the current operating mode
Pac Generated AC power
Power On Total number of grid connections
Riso Insulation resistance of the PV system to the grid connection
Serial number Inverter serial number
Vac Grid voltage
Vpv PV input voltage
Vpv-Setpoint PV target voltage
Your inverter can be in various operating modes. These are displayed as status messages, which can
vary according to the method of communication.
Message Description
Derating Inverter is overheated. The inverter will reduce its output to prevent overheating.
To avoid unnecessary output losses, the design of the PV plant should be
checked. Please inform your installer.
Error An error has been detected. Please inform your installer.
grid mon. Grid monitoring.
This message appears during the startup phase, before the inverter connects to
the grid; it usually appears in the morning and evening when there is little solar
irradiation an after an error has occurred.
MPP The inverter is operating in MPP mode. MPP is the standard display message
when operating under normal irradiation conditions.
offset Offset adjustment of measurement electronics.
Riso Measurement of the insulation resistance of the PV system.
Disturbance Disturbance. This message appears for safety reasons and prevents the inverter
from connecting to the grid. Please inform your installer.
Stop Operation interrupted.
V-Const Constant voltage operation.
waiting The conditions for connecting are not (yet) fullled.
DANGER!
Electric shock caused by high voltage at the inverter.
Even when no external voltage is present, there can still be high voltages in the device.
The following work may be carried out by qualied personnel only:
• Electrical installation
• Repairs
• Modication
CAUTION!
Risk of injury from touching the enclosure during operation.
Burns to the body.
• Only touch the lid and display during operation.
NOTICE!
Overvoltage in the inverter if yellow LED ashes 4 times.
Destruction of the inverter.
• Inform your installer immediately if the yellow LED starts
ashing and the following display message appears.
Operation
The display shows the current values of your plant. The displayed values
are updated every 5 seconds. The display is operated by tapping on it.
1 x tap: The backlight is switched on. The backlight shuts off automatically after 2 minutes.
1 x tap again: The display switches to the next notication.
2 x taps in succession*: In turn, the display shows the inverter type,
the rmware version of the internal processors, and the country standard
that is set.
Display Messages
Operation
Upon error-free connection of the inverter to the grid, after approximately one minute, the display starts alternating between the messages
shown below. Each message appears for ve seconds, then the cycle
starts over.
Energy generated on the current day
Operating state
Current feed-in capacity
Voltage of the PV array
Total amount of energy fed in
Total number of operating hours in feed-in operation
Disturbance
In the event of a disturbance, the inverter displays the status "Disturbance" and an error message. Inform your installer.
The following messages will be issued:
Energy generated on the current day
Operating state "Disturbance"
Operating state
Error message
Measured value at the time of the disturbance
Current measured value (only displayed if a measured value is responsible for the disturbance)
DC overvoltage
There is a too high DC input voltage connected to the inverter.
Immediately inform your installer.
* From rmware version 4.00
Status Designation Function
All LEDs
ashing
Start phase The inverter is in the start phase.
All LEDs are onInitialization The inverter initializes.
All LEDs are
off
Disconnection The DC input voltage at the inverter is too low for
feed-in.
Green LED
is permanently on
Feed-in operation
The inverter is feeding into the power distribution
grid.
Green LED
ashing
Waiting, grid
monitoring
The inverter monitors the grid and waits for the DC
voltage to reach a certain level so that it can start
feeding the grid.
Stop Operation interrupted.
Derating The inverter limits its active power.
Red LED on Warning A ground fault has occurred or one of the thermally
monitored varistors on the DC input side is defective. Inform your installer.
Yellow LED
is permanently on
Disturbance The inverter is operating in the "Operation constant-
ly disabled" state. This can have several causes.
Inform your installer.
Yellow LED
ashing
Disturbance The inverter displays a disturbance. This can have
several causes. Inform your installer.
LED MODES
SAFETY PRECAUTIONS PRODUCT OVERVIEW
Cooling ns
Enclosure lid
Display
LEDs
Serial number
Identication of the Sunny Boy by the type label
Operation
Grounding fault or varistor defective
Disturbance
DISPLAY
STATUS MESSAGESMEASURING CHANNELS