myenergi · An established brand in the UK. 10 codes across 2 product families, each taken from the manufacturer’s manuals. myenergi technical support ↗
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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.
10 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 4-1 | Output Overload - heater load above 16 A | Yes | Yes |
| 4-2 | Overheat - internal temperature too high | Partly | Yes |
| 4-3 | No Signal - no signal from harvi | Yes | Yes |
| 4-4 | Grid Sensor Error - grid CT incorrectly installed | Yes | Yes |
| 4-5 | Back-Feed Voltage - unexpected voltage at heater output | Yes | Yes |
| 4-6_4-7 | Over Voltage (>253 V) / Under Voltage | Partly | Yes |
| 4-8 | Load Fault - heater element or wiring faulty | Yes | Yes |
| 155-W04 | Solar Loss - PV connected but no generation | No | Yes |
| 208-F07 | PV ISO Under Fault - PV insulation resistance low | Yes | Yes |
| 209-F08 | PV Input Short Circuit | Yes | Yes |