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KACO

KACO inverter repair — which models we take on and how we work →

The most common faults on Kaco inverters

ON MANY KACO INVERTERS, AT AROUND 100,000 KWH, ERRORS APPEAR THAT RELATE TO THE INCORRECT OPERATION OF YOUR INVERTER.
TRY SWITCHING OFF THE GRID BREAKER AND SWITCHING IT BACK ON AFTER 2-3 MINUTES.
IF THE PROBLEM PERSISTS, YOU WILL NEED TO SEND US THE INVERTER FOR REPAIR.

The most common faults on Kaco inverters

KACO

62 codes
ErrorCauseAction
FS 10OvertemperatureIn case of overheating, the inverter switches off. Possible causes: • Excessively high ambient temperature • Fan covered • Inverter defective.Details → FS 100OvertemperatureThe device has been switched off because the temperatures in the housing were too high. — Check the temperature around the inverter and remove whatever surrounds it so as to lower it, as the message indicatesDetails → FS 101Measurement faultThe unit has shut down because of implausible internal measured values.Details → FS 102Measurement faultThe unit has shut down because of implausible internal measured values.Details → FS 103Measurement faultThe unit has shut down because of implausible internal measured values.Details → FS 104Measurement faultThe unit has shut down because of implausible internal measured values.Details → FS 105Measurement faultThe unit has shut down because of implausible internal measured values.Details → FS 106Measurement faultThe unit has shut down because of implausible internal measured values.Details → FS 17Grid faultThe activated grid and system protection has been tripped.Details → FS 18Leakage currentResidual current was detected. The feed-in was interrupted.Details → FS 19Insulation resistanceThere is an insulation fault on the PV generator. The feed-in was interrupted.Details → FS 30Measurement faultThe current and voltage measurements in the inverter are not within acceptable range.Details → FS 32Grid relayThe internal grid separation relay test has failed.Details → FS 33DC current at the outputThe DC feed-in has exceeded the permitted value. This DC feed-in can be caused by grid conditions and may not necessarily indicate a fault.Details → FS 34CommunicationA communication error has occurred in the internal data transmission.Details → FS 35Internal faultProtective shutdown of the software (AC overvoltage, AC overcurrent, DC link overvoltage, DC overvoltage, DC overtemperature).Details → FS 36Internal faultProtective shutdown of the hardware (AC overvoltage, AC overcurrent, DC link overvoltage).Details → FS 38DC overvoltageThe voltage of the DC generator is too high. The PV generator is configured incorrectly.Details → FS 40Grid undervoltageThe voltage of a grid phase is too low;Details → FS 41Phase failurethe grid cannot be fed into. The phase experiencing failure is displayed.Details → FS 42Phase failurethe grid cannot be fed into. The phase experiencing failure is displayed.Details → FS 43Phase failurethe grid cannot be fed into. The phase experiencing failure is displayed.Details → FS 44Phase failurethe grid cannot be fed into. The phase experiencing failure is displayed.Details → FS 45Phase failurethe grid cannot be fed into. The phase experiencing failure is displayed.Details → FS 46Phase failurethe grid cannot be fed into. The phase experiencing failure is displayed.Details → FS 47Grid faultThe measured line-to-line voltage is outside of the tolerance limits.Details → FS 48Grid underfrequencyGrid frequency is too low. This fault may be grid-related.Details → FS 49Grid overfrequencyGrid frequency is too high. This fault may be grid-related.Details → FS 50Grid overvoltageThe grid voltage measurement according to EN 50160 has exceeded the maximum permitted limit value. This fault may be grid-related.Details → FS 57Self-testWaiting time of the inverter after a fault.Details → FS 58OvertemperatureThe temperature inside the unit was too high. The inverter switches off to prevent damage to the hardware.Details → FS 59Self-testA fault occurred during a self-test.Details → FS 67Power stageThere is a fault in the power section.Details → FS 70FanThe fan is malfunctioning.Details → FS 73Grid faultStandalone mode was detected. — This message is for information onlyDetails → FS 80Insulation resistanceThe insulation measurement cannot be performed because the generator voltage is too volatile. — This message is for information onlyDetails → FS 81Grid overvoltageOvervoltage has been detected on a conductor. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 82Grid overvoltageOvervoltage has been detected on a conductor. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 83Grid overvoltageOvervoltage has been detected on a conductor. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 84Intermediate circuit (DC link)A voltage deviation has been found in the DC link. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 85Intermediate circuit (DC link)A voltage deviation has been found in the DC link. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 86Intermediate circuit (DC link)Overvoltage has been found in the DC link. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 87AC overcurrentA current that has been found on a conductor is too high. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 88AC overcurrentA current that has been found on a conductor is too high. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 89AC overcurrentA current that has been found on a conductor is too high. An internal protective mechanism has disconnected the device to protect it against damage.Details → FS 93Internal faultThe control board is defective.Details → FS 94Internal faultThe control board is defective.Details → FS 95Power stageThe power section is defective.Details → FS 96Power stageThe power section is defective.Details → FS 97AC overcurrentToo much power has been fed into the grid. Complete disconnection of the device.Details → FS 98Internal faultAn internal protective mechanism has disconnected the device to protect it against damage. Complete disconnection of the device.Details → FS 99Internal faultAn internal protective mechanism has disconnected the device to protect it against damage. Complete disconnection of the device.Details → OS 1Self-testSelf-test: The grid parameters and generator voltage are being checked.Details → OS 11Power limitationPower limitation: If the generator power is too high, the inverter limits itself to the maximum power (e.g. around noon if the generator capacity is too large).Details → OS 2Low DC voltageInsufficient generator voltage and power, status before the transition to night shutdownDetails → OS 60Low DC voltageThe inverter does not begin feeding into the grid until the PV voltage falls below a specified value.Details → OS 61Remote shutdownThe external limit Power control was activated by the grid operator. The inverter limits its power. — This message is for information onlyDetails → OS 63Power limitationP(f)/frequency-dependent power reduction: Frequency-dependent power reduction will be activated when the BDEW (German Association of Energy and Water Industries) Medium Voltage Directive goes into effect. Power reduction starts at a frequency of 50.2 Hz. — This message is for information onlyDetails → OS 64Power limitationOutput current limiting: The AC current is limited once the specified maximum value has been reached. — This message is for information onlyDetails → OS 74Remote shutdownThe grid operator limits the feed-in power of the inverter. — This message is for information onlyDetails → OS 79Insulation resistancePV generator’s insulation is being measured — This message is for information onlyDetails → OS 8Self-testChecks the shutdown of the power electronics as well as the grid relay before feed-in mode.Details →