Inverter

Service

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List

Below you will find a list of common error messages from various brands. Not all error messages are listed here. It is advisable to also consult the manual of the device.

Brand Error code Cause Action
______________ ____________________________ _________________________ ________________________________________________________
Danfoss U 3.3 Internal power supply outside limits Contact inverter service
Danfoss U 5.0 Internal power supply outside limits Contact inverter service
Danfoss U 15.0 Internal power supply outside limits Contact inverter service
Danfoss U PV Input voltage from PV string too high Please check the DC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss U-SNUBBER Snubber voltage too high If problem occurs once only: wait for the regulator to be come stable again. If problem occurs repeatedly: please contact inverter service
Danfoss U DC-BUS DC bus voltage too high If problem occurs once only: wait for the regulator to be come stable again. If problem occurs repeatedly: please contact inverter service
Danfoss U-GRID "AC grid voltage outside the threshold values (higher or lower than setting)" If problem occurs once only: wait for the regulator to be come stable again. If problem occurs repeatedly: please contact inverter service
Danfoss F-GRID Grid frequency outside limits (outside settings) If problem occurs once only: wait for the regulator to be come stable again. If problem occurs repeatedly: please contact inverter service
Danfoss IPM CURRENT The DC content in the AC current is too high. Please contact inverter service
Danfoss ENS ENS error If problem occurs repeatedly, contact inverter service
Danfoss ENS RAM ENS memory error Please contact inverter service
Danfoss ENS FL. CHKSM Flash memory error after self-test Please contact inverter service
Danfoss ENS EP. CHKSM EPROM memory error after self-test Please contact inverter service
Danfoss HW TRIP Hardware trip - current too high Please contact inverter service
Danfoss TEMP HIGH Temperature in integrated power module too high Check the inverter for heat build up or blockage of the cooler ribs and rectify as required. If this does not correct the problem, contact inverter service
Danfoss EPRM PAR. LIM "Validity check of grid voltage and frequency settings. Settings too far away from actual grid voltage and frequency values." If constant, contact inverter service
Danfoss ENS COM ERR Error in communication with ENS board If constant, contact inverter service
Danfoss ENS impedance Grid impedance step higher than limit If problem occurs repeatedly, contact inverter service
Danfoss PV—CONFIG—ERR Error detected by PV configuration test Please check the DC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss EARTHFAULT Current event shown in grid mode Check system isolation. If you consider the isolation impedance to be in order, contact inverter service
Danfoss 10-15 Grid voltage to high Please check the AC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss 103-105 PV current to high/waiting Please check the DC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss 115 PV instulation resistance is too low /retrying Check system isolation. If you consider the isolation impedance to be in order, contact inverter service
Danfoss 1-6 Grid voltage to low Please check the AC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss 16-18 Momentary grid voltage is too high As long as the inverter is detecting a grid line to line over voltage: check the line to line voltages (with a true RMS measurement device). As long as you consider line to line voltages to be in order, contact inverter service
Danfoss 19-24 Grid frequency out of range Arrange for an electrician to check the grid instantaneous voltage and grid frequency. If you consider them to be in order, contact inverter service
Danfoss 201-208 Temperature to high Check the inverter for heat build up or blockage of the cooler ribs and rectify as required. If this does not correct the problem, contact inverter service
Danfoss 209-210 Intermediate voltage inside the inverter are too high Contact inverter service
Danfoss 211 no tacho signal from fan Visual check: cooling circuit air supply. If the blockage cannot be rectified, contact inverter service
Danfoss 212 intermediate voltage inside the inverter are out of balance Please contact inverter service
Danfoss 213-215 plausibility error between internal measurements Please contact inverter service
Danfoss 216-218 grid current to high Arrange for an electrician to check the grid instantaneous voltage and grid frequency. If you consider them to be in order, contact inverter service
Danfoss 222 autotest conducted (only italy) Arrange for an electrician to check the grid instantaneous voltage and grid frequency. If you consider them to be in order, contact inverter service
Danfoss 223,255-257 islanding protection trip Arrange for an electrician to check the grid instantaneous voltage and grid frequency. If you consider them to be in order, contact inverter service
Danfoss 224 a wire is broken in the rcmu If constant, contact inverter service
Danfoss 225-240 internal memory error If constant, contact inverter service
Danfoss 241,242,249 internal communication error If constant, contact inverter service
Danfoss 243,244 internal error If constant, contact inverter service
Danfoss 246 Grid event detected, inverter stopped Arrange for an electrician to check the grid instantaneous voltage and grid frequency. If you consider them to be in order, contact inverter service
Danfoss 247 plausibility test in the functional safety processor has failed If problem occurs repeatedly: please contact inverter service
Danfoss 251 functional safety processor has reported fail safe If problem occurs repeatedly: please contact inverter service
Danfoss 25-27 Loss of mains, line to line voltage too low As long as the inverter is detecting a grid line to line over voltage: check the line to line voltages (with a true RMS measurement device). As long as you consider line to line voltages to be in order, contact inverter service
Danfoss 258 PV-voltage to high/waiting Please check the DC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss 28-30 Loss of mains, rocof out of range Arrange for an electrician to check the grid instantaneous voltage and grid frequency. If you consider them to be in order, contact inverter service
Danfoss 31-33 DC content of the grid current is too high If problem occurs repeatedly: please contact inverter service
Danfoss 34-37 Detected residual current is too high If problem occurs repeatedly: please contact inverter service
Danfoss 350-352 RCMU self-test failed If problem occurs repeatedly: please contact inverter service
Danfoss 353-355 Current sensor test failed If constant, contact inverter service
Danfoss 356-363 Transistro en relay test failed If constant, contact inverter service
Danfoss 364 Potential error in the ac installation Please check the AC wiring and measure. If you consider the wiring to be in order, contact inverter service
Danfoss 40 AC grid is not ok Please check the AC wiring and measure. If you consider the wiring to be in order, contact inverter service

Contact

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Phone

+32 (0)51 800 450