Grid frequency fault codes
84 codes across 15 brands whose manufacturer wording names grid frequency outside its range or changing too fast.
A family groups codes by the manufacturer's wording. It does not mean the codes share a cause, a trip setting or a fix: the same words can describe different measurements on different hardware, so work each code from its own entry and its manufacturer's document.
Codes by brand
Fronius
2 of 29 codes · open librarySolarEdge
48 of 361 codes · open library- 18x40The frequency measured on L1 is higher than the thresholds
- 18x41The frequency measured on L2 is higher than the thresholds
- 18x42The frequency measured on L3 is higher than the thresholds
- 18x43The frequency measured on L1 is lower than the thresholds
- 18x44The frequency measured on L2 is Lower than the thresholds
- 18x45The frequency measured on L3 is Lower than the thresholds
- 18x46The frequency measured on L1 is higher than the thresholds
- 18x47The frequency measured on L2 is higher than the thresholds
- 18x48The frequency measured on L3 is higher than the thresholds
- 18x49The frequency measured on L1 is lower than the thresholds
- 18x4AThe frequency measured on L2 is Lower than the thresholds
- 18x4BThe frequency measured on L3 is Lower than the thresholds
- 18x4CThe frequency measured on L1 is higher than the thresholds
- 18x4DThe frequency measured on L2 is higher than the thresholds
- 18x4EThe frequency measured on L3 is higher than the thresholds
- 18x4FThe frequency measured on L1 is lower than the thresholds
- 18x50The frequency measured on L2 is Lower than the thresholds
- 18x51The frequency measured on L3 is Lower than the thresholds
- 18x52The frequency measured on L1 is higher than the thresholds
- 18x53The frequency measured on L2 is higher than the thresholds
- 18x54The frequency measured on L3 is higher than the thresholds
- 18x55The frequency measured on L1 is lower than the thresholds
- 18x56The frequency measured on L2 is Lower than the thresholds
- 18x57The frequency measured on L3 is Lower than the thresholds
- 18x58The frequency measured on L1 is higher than the thresholds
- 18x59The frequency measured on L2 is higher than the thresholds
- 18x5AThe frequency measured on L3 is higher than the thresholds
- 18x5BThe frequency measured on L1 is lower than the thresholds
- 18x5CThe frequency measured on L2 is Lower than the thresholds
- 18x5DThe frequency measured on L3 is Lower than the thresholds
- 18xDEThe frequency measured on L1 is lower than the thresholds
- 18xDFThe frequency measured on L2 is Lower than the thresholds
- 18xE0The frequency measured on L3 is Lower than the thresholds
- 18xE1The frequency measured on L1 is lower than the thresholds
- 18xE2The frequency measured on L2 is higher than the thresholds
- 18xE3The frequency measured on L3 is higher than the thresholds
- 8x2E · CommercialThe frequency measured on L1 is higher than the thresholds
- 8x2F · CommercialThe frequency measured on L2 is higher than the thresholds
- 8x30 · CommercialThe frequency measured on L3 is higher than the thresholds
- 8x31 · CommercialThe frequency measured on L1 is Lower than the thresholds
- 8x32 · CommercialThe frequency measured on L2 is Lower than the thresholds
- 8x33 · CommercialThe frequency measured on L3 is Lower than the thresholds
- 8x87 · CommercialThe frequency measured on L1 is higher than the thresholds
- 8x88 · CommercialThe frequency measured on L2 is higher than the thresholds
- 8x89 · CommercialThe frequency measured on L3 is higher than the thresholds
- 8x8A · CommercialThe frequency measured on L1 is Lower than the thresholds
- 8x8B · CommercialThe frequency measured on L2 is lower than the thresholds
- 8x8C · CommercialThe frequency measured on L3 is lower than the thresholds
Enphase
1 of 13 codes · open librarySigenergy
2 of 13 codes · open libraryHoymiles
5 of 31 codes · open libraryWork it on site
Symptom-led sequences and checks that record the evidence for this kind of alarm. Follow the code's own entry for its documented step.
Terms
Standards scope
Scope pages: what each standard covers and where it sits against the others. They do not reproduce the standard, and nothing on this page states what it requires. Work from the current published edition.
How codes are placed here
A code joins only when the manufacturer's own title or description contains one of these terms as whole words. The title decides first; Wattbench's fixes and search keywords are never read. A code that matches no family, or more than one, stays unclassified.
- grid frequency
- AC frequency
- grid over-frequency
- grid under-frequency
- over grid frequency
- under grid frequency
- grid (mains) frequency
- grid high frequency
- grid low frequency
- frequency measured
- frequency change
- frequency mutation
- over frequency
- under frequency
- power frequency
- grid voltage or frequency