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Fronius IG / IG Plus Inverter Faults and Repairs

Austrian inverter manufacturer Fronius began manufacturing inverters in 1994 and are widely regarded as one of the best manufacturers of quality solar PV inverters in the world. Common models installed in the UK are the IG15, IG20, IG30, the IG Plus 35 V-1, the IG-TL 3.0 and the IG-TL 3.6.

We have a lot of experience in working with Fronius equipment, so if you would like help with diagnosing faults, carrying out servicing or repairs and are currently without an installer then we will be happy to help.

Fronius IG and IG Plus series inverters have LCD displays on the front of the chassis that providing it's working, will highlight any errors with the inverter or the solar PV system that it runs, we have listed and described common faults with Fronius LG and LG Plus Series inverters and what action to take to resolve them below:

NB: "State 104 - Grid Frequency is Beyond Permitted limits" This code is a fairly common fault code, in addition to the explanation given by Fronius in relation to grid frequencies below, this fault is often an indication of a faulty or a damaged circuit board within the inverter. Usually but not always, when a circuit board is damaged like this, the Miniature Circuit Breaker (MCB) protecting the AC circuit would also have switched itself 'Off'. Depending on the warranty situation and the age, when this State code is present and persists after the mains and the supply circuit has been tested, we usually recommend that the inverter is replaced.

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Repair Fronius IG Plus Series Inverter

 

 

Repair Fronius IG Series Inverter

Fronius IG and IG Plus Inverter Faults and Warnings:

Some of the advice we give related to identifying, confirming and or resolving some of the faults detailed below, starts with safely shutting down and restarting the inverter and the solar PV system. This is something that nearly all solar PV systems installed in the UK would have been designed to be carried out safely by the solar PV system owner. However, paperwork, schematics and manuals are not always clear or available, so if you have any concerns about how to do this, we will always be more than happy to talk you through the process over the telephone at no charge.

  • State 101 - Grid Voltage beyond specified limits - The inverter is measuring a grid voltage that is either too low or too high in relation to the parameters that the inverter has been set to safely operate within. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when the voltage is within range. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 102 - AC Voltage Too High - The inverter is measuring a grid (mains) voltage that is too high in relation to the parameters that the inverter has been set to safely operate within. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when the voltage is within range. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 103 - AC Voltage Too Low - The inverter is measuring a grid (mains) voltage that is too low in relation to the parameters that the inverter has been set to safely operate within. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when the voltage is within range. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 104 - Grid frequency Beyond Permitted limits - The inverter is measuring a grid frequency that is either too low or too high in relation to the parameters that the inverter has been set to safely operate within. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when the voltage is within range. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid. NB: See note about State 104 codes in the introduction.
  • State 105 - AC Frequency Too High - The inverter is measuring a grid (mains) frequency that is too high in relation to the parameters that the inverter has been set to safely operate within. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when the frequency is within range. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 106 - AC Frequency Too Low - The inverter is measuring a grid (mains) frequency that is too low in relation to the parameters that the inverter has been set to safely operate within. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when the frequency is within range. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 107 - No AC Grid Detected - The inverter is not measuring a grid (mains) voltage suggesting that mains power to the unit has been disconnected. A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when mains voltage returns such as might happen when mains power returns after a power cut. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 108 - Islanding Detected - The inverter understands that there has been a mains failure (a power cut). A status 1xx fault such as this, will often be temporary, the inverter will monitor the grid and reconnect when mains voltage returns. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 109 - General Mains Error - The inverter has detected a fault with the AC power supply, this could be due to damaged or faulty AC wiring or it might be picking up a disturbance on the mains supply power network. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 112 - The RCMU has detected a fault current in the Inverter - The inverter is measuring too much voltage from the panels. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that the DC side of the system including the inverter is tested.
  • State 201 - AC Voltage Too High - The inverter is measuring a grid (mains) voltage that is too high in relation to the parameters that the inverter has been set to safely operate within. A status 2xx fault such as this, will try to correct itself, the inverter will monitor the grid and reconnect when the voltage is within range. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 202 - AC Voltage Too Low - The inverter is measuring a grid (mains) voltage that is too low in relation to the parameters that the inverter has been set to safely operate within. A status 2xx fault such as this, will try to correct itself, the inverter will monitor the grid and reconnect when the voltage is within range. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 203 - AC Frequency Too High - The inverter is measuring a grid (mains) frequency that is too high in relation to the parameters that the inverter has been set to safely operate within. A status 2xx fault such as this, will try to correct itself, the inverter will monitor the grid and reconnect when the frequency is within range. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 204 - AC Frequency Too Low - The inverter is measuring a grid (mains) frequency that is too low in relation to the parameters that the inverter has been set to safely operate within. A status 2xx fault such as this, will try to correct itself, the inverter will monitor the grid and reconnect when the frequency is within range. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • State 205 - Change of public mains impedence - The inverter is measuring a discrepency with the grid (mains) in relation to the parameters that the inverter has been set to safely operate within. A status 2xx fault such as this, will try to correct itself, the inverter will monitor the grid and reconnect when the situation stabilises. If this fault persists then contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 206 - Absolute value of mains impedence is too high - The inverter is measuring a discrepency with the grid (mains) in relation to the parameters that the inverter has been set to safely operate within. A status 2xx fault such as this, will try to correct itself, the inverter will monitor the grid and reconnect when the situation stabilises. If this fault persists then contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 207 - Mains relay does not open in spite of switch off signal - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 208 - Mains relay does not close in spite of switch on signal - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 301 - Overcurrent AC - The inverter is measuring an AC current peak on the mains supply. The inverter will monitor the grid and reconnect when the current is within range. If this fault persists then contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 302 - Overcurrent DC - The inverter is measuring too much current from the panels. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that the DC side of the system including and excluding the inverter is tested.
  • State 303 - Over Temperature - The ambient temperature around the inverter is too hot. This could be due to a number of factors, for example 1) If the inverter is exposed to direct sunlight 2) If the inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The inverters components are getting too hot due to an internal component fault. If the unit isn't running hot and if after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 304 - Over Temperature Cooling Element - The temperature inside the inverter is too hot. This could be due to a number of factors, for example 1) If the inverter is exposed to direct sunlight 2) If the inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The inverters components are getting too hot due to an internal component fault 4) Dust, fluff or a similar obbstruction is blocking the vents or fans inside the chassis. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 305 - Feed in Process Not Possible - If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 306 - Power Low - Intermediate circuit voltage has dropped below permissible threshold value for feed in. This could mean either a problem with the panels or with the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 307 - DC Low - The inverter is measuring low DC voltage. Assuming that this is an existing installation that has been specified correctly, there is sufficient irradiation (sunlight), no changes near the installation area have been carried out and the system has operated before without problems, then we would advise that the DC side of the system including and excluding the inverter is tested.
  • State 308 - Intermediate circuit voltage too high - The inverter has detected a discrepency with the voltage from the AC power supply, this could be due to damaged or faulty AC wiring or it might be picking up a disturbance on the mains supply power network. If this fault persists then contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 401 - No internal communication with power stage set - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 402 - Communication with EEPROM not possible - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 403 - EEPROM faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 404 - One or both temperature sensors are defective - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 405 - Temperature sensor at cooling element defective - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 406 - Temperature sensor on the PINCI board faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 407 - Temperature sensor on the heat sink faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 408 - Direct current feed in - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 409 - Supply of the DC-AC Board Not Available - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 410 - Service Plug on the DC-AC is not plugged in correctly - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 412 - Value for fixed voltage is set higher than the open circuit voltage of the PV-generator - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 413 - Open circuit voltage too high in the moment of transformer switching - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 414 - EEPROM faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 415 - No END-enabling signal - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 416 - Communication with IG Brain not possible - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 417 - Hardware ID Collision - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 419 - Two or more power stacks with identical Unique ID - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 420 - Incomplete number of power stacks detected after reaching online threshold - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 421 - Hardware ID sequence error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 425 - Communication with the power stage set is not possible - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 431 - All power stage sets are in boot mode - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 432 - Consistent error in power stack management - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 433 - Allocation error of dynamic addresses - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 435 - Wrong configuration in EE-Prom - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 435 - Wrong configuration in EE-Prom - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 436 - Error transmission faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 437 - Power stack-work-around is active - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 438 - Error during state code transmission - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 441 - Power rack Fan Faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 442 - No phase master for a phase - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 443 - Energy transfer not possible - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 444 - AC monitoring self-test interrupted - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 445 - Invalid power stage set configuration - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 450 - The monitoring of the power stage set main processor ‘Guard’ is active - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 451 - EE Prom of Guard processor defect - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 452 - Communication between Guard and DSP faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 453 - Error in grid voltage recording - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 454 - Error in grid frequency recording - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 455 - Reference power source for AC measurement is operating outside of tolerances - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 456 - Anti islanding test faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 457 - Closed grid relay although start up signal - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 460 - Reference voltage outside permitted limits - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 461 - Rod memory faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 462 - Wrong display version - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 464 - Display error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 465 - Unknown display version - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 466 - Display is not available - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 467 - Error during start up - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 468 - Memory stack for the menu items faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 469 - Output choke mixed up - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 470 - Relay for higher DC voltage does not open - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 471 - Defect module grounding fuse - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • SState 474 - 100k Ohm module grounding measurement detects failure - This error is generated when during normal operation of the inverter, a leakage current to ground/earth is detected on the DC side of the system. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that you book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • State 475 - DC insulation fault - This error is generated when during normal operation of the inverter, a leakage current to ground/earth is detected on the DC side of the system. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that you book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • State 501 - 100k Ohm module grounding measurement detects failure - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 502 - An isolation fault between DC+ or DC- to earth has been detected - This error is generated when during normal operation of the inverter, a leakage current to ground/earth is detected on the DC side of the system. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that you book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • State 504 - No Solar Net communication possible - This is an installation/setup error within the inverter where the same address for the inverter has been used twice.
  • State 505 - The area in the internal memory for the “Setup” values is incomplete - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 506 - EEPROM faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 507 - EEPROM faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 508 - The area in the internal memory for the “Total” values is incomplete - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 509 - 24h no feed in - This error is stating that the inverter has not fed in power within the last 24 hours. This could be for a number of reasons including that the panels have been covered in snow, are excessively dirty, the inverter has developed a faiult or the panels have not been able to generate power for some other reason. If after the system has been inspected for external influences and safely shutdown and restarted this condition persists then contact us.
  • State 510 - EEPROM faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 511 - EEPROM faulty - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 512 - Too many power stage sets in the system - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 513 - Power stage set in boot mode - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 514 - No communication with one of the power stage sets - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 515 - Faulty plug connections - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 516 - One power stack exceeds the permitted limit of error messages per day (>50x) - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 517 - Change of master has taken place - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 517 - Permanent POWER LOW or DC LOW Error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 550 - Defect string fuse - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 551 - Defect module grounding fuse - This error could be related to an internal inverter error or should a leakage current to ground/earth be detected on the DC side of the system. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that you book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • State 553 - Phase master deactivated due to frequently occurring errors - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 554 - EE-Prom of NL_MON defect - This is either an internal error within the inverter or a discrepency with the mains voltage. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 555 - Axial fan defect - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 556 - Radial fan defect - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 558 - Feature disabled - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 559 - "Low Voltage Ride Through" event - Grid voltage parameters outside of the limits have caused a grid voltage gap. The inverter attempts to bridge the grid voltage gap. This fault is corrected automatically when the grid parameters return to normal. If this condition persists then contact us.
  • State 560 - Power reduction due to over-frequency - The inverter has reduced output power due to excessive grid fre-quency. If this fault persists then contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • State 561 - Power reduction because of excessive temperature - The inverter is measuring a temperature that is too hot and has reduced power output to protect itself. This could be due to a number of factors, for example 1) If the inverter is exposed to direct sunlight 2) If the inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The inverters components are getting too hot due to an internal component fault. If the unit isn't running hot and if after the system has been safely shutdown and restarted this condition persists then contact us.
  • State 562 - Power reduction because of AC overcurrent - The inverter is measuring excessive AC current and has reduced power output to protect itself. If this fault persists then contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the DC side of the system or with the grid.

We are familiar and comfortable in working with these units, please let us know if there is anything that we can help with with regards to error codes and faults, repairs, specifying replacements and or if you have any performance or safety concerns.

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"We were very relieved to find Glen when our Solar Panel system stopped working, as our original supplier had gone out of business. We cannot praise Glen's persistence enough as he thoroughly reviewed the system to identify the faults and repair it, despite the searing heat of last summer. He also talked to Solar Edge and provided fault data to enable us to get a replacement part under warranty. Many thanks Glen for getting us up and running again!" - Jane Pearce, Highworth

Recomendation via Facebook

"Excellent service. We contacted Glen when our solar PV system stopped working. His response was prompt, he explained all we needed to know and got the system up and running after just a matter of days. Glen was friendly, professional and most of all reliable and we would have no hesitation in highly recommending him." Fran Armstrong, Market Lavigton

Recomendation via Facebook

"Glen was very helpful and very reasonably priced. I would recommend him, and use him again in future if I need any solar work." Venu Jega, Highworth

Review via Google

"Outstanding. Conscientious, thorough, friendly and reasonably priced service. Highly recommended. Made our solar panel battery system safe, correcting the sub-standard work of others. Will always use this trustworthy PV electrician. Even after the work was completed, he studied the manual for our system and assisted with resolving further problems. Thanks Glen." Rob Barnes, Royal Wootton Bassett

Review via Cylex

"Very decent with a helpful attitude and expert in the technical side and reliable too. Had to integrate with our roofers to use their scaffolding before and after their work to take down and reinstall our PV panels. Helpful scheduling. Up and running again to our satisfaction at a decent price." David Ballard, Ramsbury

Review via Google

"I got in touch with Glen as our old converter was no longer working due to its age (9 years). Glen quickly diagnosed the inverter and tested the solar panels. The next week replaced it with a new inverter with WiFi connectivity. Everything is working again perfectly and I can see what power it's generating on a phone App now. Great service!!" Peter Dowsett, Chippenham

Recomendation via Facebook

"Glen replaced our inverter. Excellent honest guy. We wouldn’t deal with anyone else highly recommended." Nicola Moger, Devizes

Recomendation via Facebook

"Our inverter failed and as our installer had gone out of business did not know what to do. Contacted Glen who was brilliant. Came out checked the failure dealt with the manufacturer and all aspects of the warranty claim.New inverter received under warranty and Glen came out and fitted the new one straightaway. Superb service from a very professional and helpful person. Highly recommend this company." Martin Brailey, Wokingham

Review via Google

"Had a tricky fault on my (8 year) old system which Glen narrowed down and has now sorted at a very reasonable price. We have also had our faulty inverter replaced by In Balance; would recommend if he covers your area!" Peter Nobes, Bath

Recomendation via Facebook

"My inverter failed and Glen very quickly got my system up and running again. He was very professional but explained everything to me. Many thanks Glen and I've already recommended him." Di Foxwell, Wroughton

Recomendation via E-Mail

"New meter doing the business nicely. Good job, great service and friendly with it. Our thanks." Richard Illsley, Marlborough

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Areas Served: Abingdon, Aldbourne, Andover, Babbacombe, Banbury, Bantham, Barnstaple, Basingstoke, Bath, Berkshire, Bicester, Bideford, Blunsdon, Bodmin, Box, Bracknell, Bradford on Avon, Bridgewater, Bristol, Brixham, Bude, Burford, Burnham-on-Sea, Calne, Camberley, Carterton, Chard, Cheltenham, Chippenham, Chipping Norton, Chipping Sodbury, Cirencester, Cleveden, Cornwall, Corsham, Crewkerne, Cricklade, Devizes, Devon, Didcot, Dorset, Evesham, Exeter, Exmouth, Faringdon, Fleet, Frome, Glastonbury, Gloucester, Gloucestershire, Hampshire, Henley-on-Thames, Highclere, Highworth, Holsworthy, Honiton, Hook, Hungerford, Ivybridge, Keynsham, Kingsclere, Kingskerswell, Lambourn, Launceston, Lechlade, Lyme Regis, Lyneham, Lynton, Maidenhead, Malmesbury, Marlborough, Marldon, Marshfield, Melksham, Minehead, Minety, Newbury, Newquay, Newton Abbot, Okehampton, Oxford, Oxfordshire, Painton, Pewsey, Plymouth, Purton, Ramsbury, Royal Wootton Bassett, Salcombe, Salisbury, Seaton, Shalbourne, Sidmouth, Slough, Somerset, Stow, Street, Stroud, Swindon, Taunton, Tewkesbury, Thatcham, Tiverton, Torquay, Totnes, Trowbridge, Wanborough, Wantage, Warminster, Wellington, Wells, Weston-super-Mer, Weymouth, Wiltshire, Winchester, Windsor, Witney, Wokingham, Worcester, Wroughton, Yate and Yeovil.

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