The Complete Guide To SAJ Inverter Error Codes

The average grid voltage over the last ten minutes was above the limit, so the inverter disconnected as the Australian rules require. It reconnects itself; if it happens most days the street voltage is high and the network may need to be told. Code 15 (E015) on string and H2 units; the H1 hybrid shows it as Grid Volt.10min Warn 30.

The surge protection device inside the inverter on the AC side (42) or DC side (43) has been used up, usually after a lightning strike or a big surge on the network. The inverter may keep running but is no longer protected until the device is replaced by a technician. Codes 42 and 43 on the R6 and H2. On the H1 hybrid 42 and 43 are Out Insert Err and Inv Wave Err instead.

The grid frequency rose above the inverter's limit for a moment and it disconnected. It reconnects by itself once the grid is steady; if it keeps happening the grid standard setting needs checking. Code 18 (E018) on string and H2 units; the H1 hybrid shows it as Grid Freq.High Warn 27 or 59.

The grid frequency dropped below the inverter's limit for a moment and it disconnected, which can happen when the network is under strain. It reconnects by itself once the grid is steady. Code 19 (E019) on string and H2 units; the H1 hybrid shows it as Grid Freq.Low Warn 28 or 60.

On a three-phase R6 or H2, the three grid phases are out of sequence or one is missing, so the inverter will not connect. This is an AC wiring matter for the installer; it is not something a restart fixes. Code 35 on the R6 and H2. On the older single-phase Sununo Plus and R5 list, 35 is Current High instead. Wiring faults need an electrician, so we treat them as a call.

The inverter cannot see mains power on its AC side. Usually the power is out, the solar supply main switch or breaker is off, or an AC connection is loose; it reconnects by itself once the grid is back. Code 24 (E024) on the R5, R6, Sununo, Suntrio and H2; the older H1 hybrid shows it as Grid Loss Warn 29 or 61, and 37 on the R6 and H2 is Master Islanding Error, the same grid-loss trip.

The mains voltage at the inverter went above the limit it is allowed to export at, so it disconnected. It reconnects by itself; if it happens most sunny afternoons the AC cable run or the street voltage needs checking. Code 9 (E009) on the single-phase units, 9, 11 and 13 per phase on three-phase R6 and H2 units; the older H1 hybrid shows it as Grid Volt.High Warn 25 or 57.

The mains voltage at the inverter dropped below its limit for a moment, often during a brownout or when a large load starts nearby, and it disconnected. It reconnects by itself once the grid is steady. Code 10 (E010) on the single-phase units, 10, 12 and 14 per phase on three-phase R6 and H2 units; the H1 hybrid shows it as Grid Volt.Low Warn 26 or 58.

On the H2 hybrid, a PV string or the battery is connected the wrong way round at the inverter. This is a wiring fault that must be corrected by an electrician; do not keep restarting it. Code 25 on the H2. On the older Sununo and R5 list the same number family (24 to 26) is grid loss on the Suntrio three-phase units.

On the older H1 hybrid, the inverter's output waveform is wrong (43), the output is connected where it should not be (42), or the battery charging bridge current is out of range (47, 48). These are faults inside the unit or in its wiring and need a technician; do not keep restarting it. On the H2 and R6, 42 and 43 are the AC and DC surge protector errors instead.

The inverter measured more current from a string than it allows. SAJ's H2 manual says the usual cause is a string connected the wrong way round, otherwise damage inside the unit. Code 39 (E039), with 40 for PV2 on the older single-phase list; 88 (E088), SW PV Current High, is the same trip caught by software. The H1 hybrid lists them as 14, 15, 21 and 22. A repeat needs an electrician.

During a blackout the backup (off-grid) output voltage sagged because the appliances on it draw more than the battery can supply, the battery is nearly flat, or the battery is too hot or cold to give full power. Switch off heavy appliances and let the battery charge. Code 16 on the H2; the H1 hybrid shows it as Out Volt.Low Warn 32, where 32 on the H2 is Bus Voltage Balance Error. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The appliances on the backup circuit are drawing more than the H2 can supply (94, Output OverLoad) or more than the battery can give because it is nearly flat (92, Battery OverLoad), often an air conditioner, oven or pump starting together. Switch off the heavy appliances and let the battery charge. The H1 hybrid lists it as 18 and 31, where 31 on the string units is ISO Error. Insulation faults are a safety fault, so we treat them as a call.

The inverter detected a short circuit on the backup (off-grid) output, which means a fault in the wiring or an appliance on that circuit. Do not keep restarting it; the backup wiring needs an electrician. Code 17 on the H2. On the H1 hybrid, 17 is Inv Short Err, the same family.

The voltage from the panels is above what the inverter accepts, usually too many panels in one string, which shows up most on cold clear mornings. The string design needs checking by an electrician. Code 36 (E036) on the R6 and H2, 76 and 77 (PV1 and PV2) on the Sununo Plus, Suntrio Plus and R5, 19 and 20 on the H1 hybrid.

The inverter's own leakage-current sensing circuit failed its self-check, as opposed to finding a real leak. If one restart does not clear it the board inside has failed. Code 6 (E006) on the R5, R6, Sununo, Suntrio and H2; the H1 hybrid lists it as 02, where 2 on the string units is EEPROM Error. Code 8 (E008), Current Sensor Error, is the same kind of failed self-check on the current circuit.

The inverter measured current leaking to earth from the solar or AC wiring, usually damaged cable insulation, water in a connector or on the panels, or a poor AC earth. Because this is a safety trip, a repeat needs an electrician. Code 27 (E027) on the R5, R6, Sununo, Suntrio and H2; the older H1 hybrid shows it as GFCI Err 11, where 11 on three-phase R6 and H2 units is Phase 2 Voltage High.

The inverter found too little insulation between the solar wiring and earth, usually water in a connector or isolator, a chafed cable or a damaged panel. Morning alarms that clear by midday point to dew; one that stays is a safety issue for an electrician. Code 31 (E031) on the R5, R6, Sununo, Suntrio and H2; the older H1 hybrid shows it as ISO Err 06, where 6 on string units is GFCI Device Error.

The inverter detected the signature of a DC arc on the solar wiring (87), which SAJ says comes from a short circuit or a poor terminal contact, and it shut down to prevent a fire. Do not restart it until an electrician has inspected the DC connectors. Codes 83 (E083), Arc Device Error, and 55 or 57, AFCI Lost, mean the arc detection circuit itself has failed and also need a technician.

The inverter measured more than about 10 volts between neutral and earth at its AC terminals, which usually means the earth connection is missing or poor, or active and neutral are swapped. This is an AC wiring fault for an electrician; do not keep restarting it. Code 44 (E044) on the R5, R6, Sununo and H2; the H1 hybrid shows the same family as GND loss Warn 52 and LN Wrong Warn 53.

A cooling fan on the inverter has stopped or is jammed, often by dust, leaves or a nest. The inverter may keep running but will overheat on hot days until the fan is cleared or replaced. Code 45 (E045), with 46 to 48 for the other fans on larger R6 and H2 units; the H1 hybrid lists it as 03 and 35, where 3 on the other units is Temperature High. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The inverter's temperature went over its limit, so it cut back or stopped. Usually it is mounted in direct sun, in a hot closed space, or its heatsink is blocked; it comes back once it cools, but if it happens on ordinary days the mounting spot or fan needs a look. Code 3 (E003) on string and H2 units; the H1 hybrid lists it as Temp.High Err 07, where 7 on the others is DCI Device Error. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The inverter's internal temperature is below the point it will run at, which only happens on very cold mornings or in an unheated shed. It starts itself once the day warms up. Code 4 (E004) on string and H2 units; the H1 hybrid lists it as Temp.Low Err 08. If it shows on a mild day the temperature sensor is suspect.

The circuit that checks how much DC the inverter lets into its AC output has failed its self-check. One restart may clear it; if it comes back the board inside has a fault. Code 7 (E007) on the R5, R6, Sununo, Suntrio and H2; the older H1 hybrid lists it as DCI Err 12, where 12 on the three-phase R6 and H2 is Phase 2 Voltage Low instead.

The inverter's demand response (DRM) port, which Australian rules require, has received the DRM0 signal to disconnect, or its plug or link has been pulled out so the inverter thinks it has. Nothing is wrong with the inverter itself; the DRM wiring or plug needs the installer. Code 86 (E086) on every SAJ list, 92 on the H1 hybrid; 78 on the H2 is a similar external disconnect command.

The inverter has lost contact with the energy meter or CT clamp it uses for export limiting and the home-use display, so the app shows wrong grid figures and the export limit may hold back production. The meter wiring or settings need the installer. Code 49 (E049) for the main meter, 51 (E051) grid meter and 59 PV meter on the H2; 56 on the H2 is CT Device Err; the H1 shows Meter Lost Com Warn 91.

The boards inside the inverter have stopped talking to each other: master to slave processor (5, 50), or display board to control board (81, 56, 72, and 65 on the H1). Not the wifi or app link. It can recover with one restart; if it comes back a board or ribbon cable needs a technician. The H1 hybrid also lists it as 05, 11 and 37, where 11 on three-phase units is a grid voltage code.

The voltage on the inverter's internal DC bus went above its limit. SAJ points first at the string design: too many panels in series pushes the voltage past the inverter's maximum on cold mornings. If the strings are right, it is a fault inside the unit. Code 33 (E033); 32 (E032) Bus Voltage Balance Error is the two halves of the bus out of step. The H1 hybrid lists bus high as 09 and 39.

The voltage on the inverter's internal DC bus dropped below where it can run, often at dawn or dusk when the panels cannot hold it, or when a battery sags under a heavy backup load. SAJ's fix is a five-minute restart; if it shows in full sun the inverter needs testing. Code 34 (E034) on string and H2 units; the H1 hybrid lists it as 10, and its Bus SoftTimeOut Err 36 is the bus failing to charge.

The inverter's settings memory failed its check on the control board (Master EEPROM Error) or the display board (HMI EEPROM Error). One restart often clears it and SAJ suggests checking the firmware is current; a repeat is a board fault. Code 2 (E002) on string and H2 units, 04 on the H1 hybrid. HMI EEPROM Error is 51 on the three-phase R6, 52 (E052) on the H2 and single-phase R6, 66 on the H1. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The inverter's hardware protection tripped because the internal DC bus went well over its limit, usually a string with too many panels in series or a fault inside the unit. Code 38 (E038) on string and H2 units; the H1 hybrid lists it as 13, where 13 on the three-phase units is Phase 3 Voltage High. If one restart does not clear it the power board needs a technician.

The inverter's hardware protection tripped on a large surge of output current, often a loose AC connection or a grid disturbance. Code 41 (E041) on string and H2 units; the Sununo Plus and R5 also have 35, Current High, for the software version, and the H1 hybrid lists 16, 17 (short circuit) and 23. SAJ's step is to check the AC cables are secure, then restart once; a repeat needs a technician.

The relays that connect the inverter to the grid failed their self-test. SAJ's H2 manual says the cause can be a live wire earthed on the grid side, very low grid voltage, or the relay circuit itself. A restart may clear a one-off; a repeat means the relay has failed and the inverter needs a technician. Code 1 (E001) on every SAJ list, including the H1 hybrid.

The inverter ran its grid protection self-test (the over and under voltage and frequency trip timing) and failed, so it will not feed the grid until the test passes. This is a settings or firmware matter for the installer, or a fault in the protection circuit. Code 40 on the R6 and H2. On the Sununo Plus and R5 list, 40 is HW PV2 Current High instead. A failed self-test means the inverter cannot prove its own protection works, so we treat it as a call.

The inverter is letting a small amount of DC into its AC output, which the grid rules do not allow, so it disconnected. A one-off usually clears after a wait or one restart; if it keeps coming back the output stage or its sensor needs testing. Code 28 (E028), with 29 and 30 for the other phases; 21 to 23, DCV Error, is the same check on the output voltage. On the H1, 28 is Grid Freq.Low Warn. DC on the AC side is a protection fault, so we treat it as a call.

The inverter's authorisation period has run out and it has stopped or limited output. This is an administrative lock set through the distributor, not a hardware fault; the installer or SAJ service needs to renew it. Code 85 on the R6 and H2. On the H1 hybrid, 85 is BMS DCHG Curr.H Warn instead. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

On the H2 hybrid, the setting for how the batteries are connected (single or parallel input) does not match the wiring, or one of the paralleled battery connections is loose. This is a settings and wiring matter for the installer. Code 20 on the H2; on the H1 hybrid 20 is PV2 Volt.High Err instead.

On the older H1 hybrid, the battery reports it is too hot to charge (87) or discharge (86) safely, so the inverter has paused it. It clears once the battery cools; if it happens on mild days the battery's location or cooling needs a look. On the H2 and R6, 86 and 87 are DRM0 Error and Master Arc Error instead. Heat shutdowns point at a failing fan, a blocked vent or a bad installation spot, so we treat them as a call.

The battery's management system has reported an internal problem to the inverter. On SAJ battery stacks, 97 and 98 mean the packs are not talking to each other, usually a missing terminator on the last pack or a wrong communication cable. Code 54 on the H2 (52 on the three-phase R6), 68 on the H1 hybrid. The battery needs a look from the installer. Internal and hardware faults need testing with the right instruments, so we treat them as a call.

The inverter cannot talk to the battery's management system (BMS), so it will not charge or discharge until contact is back. SAJ says the usual cause is the battery not switched on or not started properly; otherwise the communication cable between the battery and inverter needs checking. Code 55 on the H2 (53 on the three-phase R6 list); the H1 hybrid lists it as 51 and 89.

The inverter's two processors each measure the grid voltage, frequency, leakage current or bus voltage, and their readings do not agree, so it stops. One restart may clear it; a repeat means a measuring circuit has failed. Codes 51, 54 and 57 on the Sununo Plus, Suntrio Plus and R5; 41, 44, 46, 49 and 50 on the H1, where 51 to 57 on the H2 are battery and meter codes.

The separate DC-to-DC unit that sits between an H2 and its battery has stopped talking to the inverter (69) or reported a fault of its own (70). SAJ's advice for both is to contact the installer. Codes 69 and 70 on the H2; on the H1 hybrid 70 is not used.

On the older H1 hybrid, the battery's management system has told the inverter not to charge (54), not to discharge (55) or to force a charge (56), usually because the battery is full, flat, or too hot or cold. This is the battery protecting itself and normally clears on its own. The same numbers on the H2 are BMS Device Error, BMS Lost.Conn and CT Device Err.

More current flowed to or from the battery than it allows for a moment, usually a heavy backup load on a battery that is already low. SAJ's steps are to reduce the backup load and let the battery charge; if it repeats with normal loads the battery and its settings need checking. Code 90 on the H2 (99 and 100 are the pack's own overcurrent protections); the H1 lists the BMS warnings as 83 and 85. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The battery has reached its minimum charge, or its voltage dropped too low under a heavy backup load, so the inverter stopped drawing from it to protect it. This is normal protection, not a fault: it clears once the sun or the grid recharges the battery. Code 96 on the H2 (101 and 103 are the battery pack's own low-voltage protections); the H1 hybrid shows it as 63, 64, 82 or 88.

The inverter cannot see any voltage from the battery, which usually means the battery breaker or switch is off or a battery cable is loose. Code 95 on the H2; the H1 hybrid shows it as Battery Open Warn 62, and its 33, Bat Input Short Err, is the opposite fault, a short on the battery input, which needs an electrician. Over-voltage, over-current and short-circuit faults can damage hardware, so we treat them as a call.

The inverter tried to connect the battery gently (pre-charging its internal bus) and timed out, which points to the battery relay, the pre-charge circuit or a battery that will not close its contactor. SAJ's advice is to contact the installer or SAJ service. Code 93 on the H2.

The battery voltage is above what the inverter is set for (89), or rose too high while charging (91), which SAJ says can happen if the battery is switched off mid-charge. On the H1 hybrid the same family is 34 and the BMS cell-high warning 81. Let it settle, do not switch the battery off while charging, and have the battery type and charge settings checked if it repeats. Battery protection faults are not something to ride out at home, so we treat them as a call.

The clock on the inverter's display board has lost its time or failed, so time-of-use schedules and the daily graphs can be wrong. SAJ's advice is to contact the installer; it is usually fixed by setting the time or replacing the display board. Code 53 (E053) on the H2 and R6 single-phase, 52 on the R6 three-phase, 67 on the H1 hybrid.

The inverter's setting for how the strings are connected (independent or paralleled inputs) does not match the wiring, so it refuses to run or runs badly. This is a settings matter for the installer. Code 84 (E084) on the H2 and R6 single-phase, 68 and 74 (PVInputModeFault) on the R6 and H2 three-phase units.

On a site with more than one H2 running in parallel, the units have lost contact with each other over the CAN cable, or the number of online units does not match the setting. The parallel cable, the slave ID settings and the termination need checking by the installer. Codes 26 and 71 on the H2.