Operation / Service
Sometimes I notice a service code 434 on my inverter (ground fault detected), but the next day it’s gone and the system is operating normally – why is that happening?
If a PV system has a ground fault above 1.0A, the ground fault detection system has two means of stopping the current – either the 1.0A fuse will blow or the unit may be able to stop operation prior to the fuse blowing. In the latter case, the unit will restart once the ground fault current is sufficiently below the 1.0A threshold.
Whom do I call with service-related questions?
If you’re a homeowner, it is best to contact the system installer. They will be best equipped to answer any questions or assist with technical support. For installers and distributors, advanced-level technical support is available by contacting our office at 810.220.4414, or by emailing us at firstname.lastname@example.org.
I’ve heard that active cooling (using an internal fan to cool the inverter) can cause reliability problems. Is this true?
Active cooling is a great way to reduce the weight of an inverter, because it means it does not require large heat sinks. However, the fan must be adequately specified and the risk of insects and dust entering the inverter must be minimized. The FRONIUS IG uses fans that have been used in our products for over a decade, and has a 50,000-hour lifetime rating at full speed. Insects and dust are kept out by a mesh covering the vent louvers. On top of that, all electronic boards inside the inverter are conformal coated and in this way hermetically sealed against external influences. One can be confident in these approaches since over 125,000 FRONIUS IG units have been installed worldwide without any such issues.
I am receiving a Service Code on my inverter. How do I determine what this means?
Your FRONIUS IG should come with an operation manual (also available under the Downloads section). Some service codes are temporary and will resolve themselves (Normal Operation Codes), and others require the assistance of your installer (Extended Codes). Examples of Normal Operational Codes are States 104 and 306. For Permanent Codes, please call the individual that installed your system. They will be most familiar with your system and well-qualified to assist you.