Service Code 307 On The Inverter; Initiating Rapid Shutdown; Resetting After Rapid Shutdown - Fronius Rapid Shutdown Box - Quattro Instructions D'installation

Fronius Symo 24.0-3 480 **)
*) Initiation via loss of AC only with Power stage SW2 version 0.6.34.4 or greater. See sec-
tion Connecting the Rapid Shutdown Box to Primo 10.0 - 15.0 for installation details
**) maximum DC voltage: 600 V
Service code 307 Service code 307 on the display of the inverter:
on the inverter
Description: At the input, the inverter identifies a DC voltage too low for the grid power feed
operation. If the service code occurs for a lengthy period of time in spite of solar radiation,
the following steps can help discover the error:
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Initiating Rapid Depending on the configuration and the installation situation on site there are two
Shutdown possibilities to initiate Rapid Shutdown:
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Resetting after In order to start-up a PV system after Rapid Shutdown:
Rapid Shutdown -
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Check the position of the DC disconnector at the inverter - it should be ON
Read the DC voltage on the display or measure it at the inverter terminals
- If the DC voltage is 0 V, this means that either the Rapid Shutdown Box is not sup-
plied with power from the pv array or there is no electrical connection between the
Rapid Shutdown Box and the inverter. Check DC cabling including Rapid Shut-
down Box inputs. Rapid Shutdown Box Quattro: At least one string has to be
connected at input 1.
- If the DC voltage is approximately 28 V, this means that the Rapid Shutdown Box
is supplied with power and is waiting for approval at the signal ports. Check ca-
bling of the signal loop and position of any switches in the signal loop.
If the service code still occurs in spite of solar radiation, contact your system engineer.
Via loss of AC: If you connected the Signal loop to the inverter (see section Connect-
ing the Rapid Shutdown Box to an Inverter at page 16), you can initiate Rapid Shut-
down by disconnecting the AC connection of the inverter (e.g. at the service panel). In
such a case the inverter detects the loss of AC and triggers the Rapid Shutdown Box-
es in order to isolate the PV array from the controlled conductors and discharge them.
Via external switch: If the initiation via loss of AC is not suitable or additional possi-
bilities are required, you can install external switches in the Signal loop (see section
Connecting the Rapid Shutdown Box to an Emergency Stop Button at page 18) If so,
Rapid Shutdown can be initiated by pressing one of those switches to trigger the Rapid
Shutdown Boxes in order to isolate the PV array from the controlled conductors and
discharge them.
If the Signal loop is connected to the inverter, AC must be present to restart.
Release the switch that was used to initate Rapid Shutdown in the first place to the
closed position
Check all other external switches installed in the Signal loop for correct position
(closed)
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