Class 2 (continued)
Code
Designation
Description
Repair
208
Problems with the mains relay
ENS recognises a faulty mains relay
If Service-Code is displayed permanently, you should contact a Fronius trained service technician
Class 3
Service class 3 comprises service codes which may appear during operation of feeding power supply, which however basically do not cause a permanent interruption of the operation of feeding power into the mains. After automatic disconnection from the mains and monitoring of the mains as stipulated, your FRONIUS IG unit will try to resume the feeding operation. Code
Designation
Description
Repair
301
overload current (AC)
Short interruption of power supply feeding into mains network caused by overload current FRONIUS IG resumes starting up phase
automatically by itself
Short interruption of power supply feeding into mains network caused by overload current FRONIUS IG resumes starting up phase
automatically by itself
Short interruption of power supply feeding into mains network caused by temperature excursion
after a two minutes’ cooling phase your FRONIUS IG unit begins starting up again
air vents clogged
clean air vents.
302
303 *
overload current (DC)
temperature excursion AC side
Should the service load appear permanently you should contact your installation specialist
Should the service load appear permanently you should contact your installation specialist
Should the service load appear permanently you should contact your installation specialist 304 *
temperature excursion DC-side
Short interruption of power supply feeding into mains network caused by temperature excursion
after a two minutes’ cooling phase your FRONIUS IG unit begins starting up again
air vents clogged
clean air vents. Should the service load appear permanently you should contact your installation specialist
* Service code 303 and 304 are shown briefly under certain circumstances. A brief display of the service codes 303 and 304 does not mean there is a fault.
68
