SAJ uses the same code numbers on the R5 single phase and R6 three phase on-grid ranges. The R5 shows the number only (for example 24); the R6 adds "E0" (for example E024). The table below comes from SAJ's R5 and R6 user manuals.
What SAJ error codes mean, in plain words
The inverter checks the grid, the panels, earthing and its own temperature many times a second. When a reading goes outside its safe range, it stops feeding power and shows a code. Codes marked "Master" and "Slave" in the manual are the same checks done by two measuring boards; a mismatch between them is reported separately.
Where SAJ errors come from
Grid side
09, 10, 15, 18, 19, 24
Panel side
31, 36, 76, 77, arc
Inside the inverter
01, 02, 05, 06, 07, 33, 38
SAJ R5 and R6 error code table
| Code | What it means | Typical cause |
|---|---|---|
| 01 / E001 | Relay error | Internal: call SAJ support if it repeats |
| 02 / E002 | Storage (EEPROM) error | Internal memory |
| 03 / E003 | High temperature | Blocked airflow, dusty heat sink, hot room |
| 04 / E004 | Low temperature | Very cold surroundings |
| 05 / E005 | Internal communication lost | Internal |
| 06 / E006 | GFCI device error | Internal leakage sensor |
| 07 / E007 | DCI device error | Internal |
| 08 | Current sensor error | Internal |
| 09 / E009 | Grid voltage high | High local voltage, often at midday |
| 10 / E010 | Grid voltage low | Weak supply or long service cable |
| 15 / E015 | 10-minute average grid voltage high | Voltage stays high for a long time |
| 18 / E018 | Grid frequency high | Unstable supply |
| 19 / E019 | Grid frequency low | Unstable supply |
| 24 / E024 | No grid | Load-shedding or a tripped breaker |
| 27 / E027 | GFCI (leakage) error | Leakage to earth on the panel side |
| 28 / E028 | DCI error | DC on the AC output |
| 31 / E031 | Insulation (ISO) error | Damaged cable or wet connector on the panel side |
| 33 / E033 | Bus voltage high | Internal or PV voltage high |
| 34 / E034 | Bus voltage low | Internal |
| E036 | PV voltage high | Too many panels in a string for cold mornings |
| 38 / E038 | Hardware bus overvoltage | Internal |
| 39, 40 / E039 | PV hardware overcurrent | Panel side |
| 41 / E041 | Inverter hardware overcurrent | Internal or grid disturbance |
| 44 / E044 | Neutral-to-earth voltage error | Earthing or neutral problem |
| 45 / E045 | Fan error | Fan blocked or failed |
| 49 / E049 | Meter communication lost | Meter cable or meter off |
| E051 | Grid meter communication lost | Meter cable or meter off |
| E052 / E053 | Display memory or clock error | Display board |
| 50 to 73 / E050 to E073 | Second-board voltage, frequency, GFCI or no-grid check | Same causes as the matching grid codes |
| 76 / 77 | PV1 / PV2 overvoltage | String voltage too high |
| 81 / E081 | Display-to-control board communication lost | Internal |
| E083 / E087 | Arc device or arc (AFCI) error | Loose or damaged panel connection |
| E084 | PV mode error | PV input setting |
| E088 | PV current high | Panel side |
| 86 / E086 | DRM0 error | Australian demand-response input, not used in Pakistan |
SAJ safe owner checks
- Photograph the screen and note the date and time.
- Open the eSolar app and look at Event info to see how often the error repeats.
- During load-shedding, a "No grid" or "Grid lost" error is normal. It clears when the supply returns.
- Check whether your main breaker or a voltage protector has tripped.
- Keep the heat sink free of dust and the area around the inverter ventilated. Never wash the inverter with water.
- For meter communication errors, check that the meter display is on.
When to call an engineer
- Relay, memory (EEPROM), GFCI or DCI device, current sensor, bus or hardware errors that repeat.
- Grid voltage errors that happen every afternoon: we measure the voltage at the inverter and check the AC cable size and length.
- Insulation (ISO) or leakage (GFCI) errors, especially after rain or panel washing.
- Arc (AFCI) errors: switch off at the AC breaker and call us.
SAJ service in Punjab
We service SAJ inverters in Faisalabad, Lahore and across Punjab, including systems installed by other companies, as a paid visit.
Send us
A photo of the error, your SAJ model and serial number, and when it happens.