Sungrow SG250K3, Operation Manual, Page: 17 / 66

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2.3.2. Functions of the Touch Screen
The touch screen panel includes three main parts: the LED indicators, the touch
screen display and the keys.
With this data interface component, users can easily access the running
information of the unit and perform some control functions:
• Control inverter operation
• Display real-time running data
• Display fault data
• Adjusting SG250K3 parameters
• Access recorded history data
2.3.3. Emergency Stop Button
The Emergency stop button will shutdown the inverter (switch off the AC
contactors and stop the IPM from working) immediately when it is punched
(pressed down). The inverter must be startup manually through touch
screen and keys after the button is punched.
2.3.4. Start/Stop Switch
The inverter can only be started when the start/stop switch is pointed to the
“start” position.
When you turn the switch to the “stop” position, it will give the inverter a stop
command like the same command of the emergency stop button.
The inverter can not start when the switch is pointed to the “stop” position.
2.3.5. DC Breaker
The DC breaker controls the DC main circuit breaker, which is the primary
disconnect device for the inverter.
When the DC breaker is in the OFF position, all DC power is disconnected (not
live), except the following areas:
• The input side of the AC circuit breaker (connect the utility grid)
• The DC input terminals (if the PV array is connected and energized)
To operate the inverter the DC circuit breaker switch must be in the ON position.
2.3.6. AC Breaker
The AC breaker controls the AC circuit breaker, which is also one of the
primary disconnects for the inverter. When the AC breaker is in the OFF
position, all AC power is disconnected (not live), except the following areas:
• The AC input terminals (connect the utility grid)
• The DC input side (if the PV array is connected and energized)
To operate the inverter the AC circuit breaker switch must be in the ON position.