10 Error events and troubleshooting
Installation and Operation Manual for Inverter RPI M50A_12s V1 EU EN 2017-03-09
132
10.3 Faults
Number Message Possible cause Correction suggestions
F36, F37,
F38, F39,
F40, F41
AC Current High
(AC Current High)
Overvoltage during operation. Contact Delta Customer Service.
Internal error. Contact Delta Customer Service.
F30
Bus Unbalance
(Bus Unbalance)
Incomplete independent or parallel configuration
between the inputs.
Check the input connections.
Grounding of the PV system. Check the insulation of the PV system.
Internal error. Contact Delta Customer Service.
F60, F61,
F70, F71
DC Current High
(DC Current High)
Internal error. Contact Delta Customer Service.
F24
Ground Current
(Ground Current)
Insulation fault in the PV system. Check the insulation of the DC inputs.
Large PV system capacitance between Plus
and Ground or Minus and Ground.
Check the capacitance, it must be < 2.5 µF.
Install an external transformer if necessary.
Internal error. Contact Delta Customer Service.
F45
HW AC OCR
(HW AC OCR)
Large grid harmonics. Check the grid waveform. The grid connection
must be far away from non-linear loads; if nec-
essary, move further away.
Internal error. Contact Delta Customer Service.
F31, F33,
F35
HW Bus OVR
(HW Bus OVR)
The DC input voltage is greater than the maxi-
mum permissible DC input voltage.
Change the solar system setting so that the DC
input voltage at DC1 lies below the maximum
permissible DC input voltage.
Overvoltage during operation. Contact Delta Customer Service.
Internal error. Contact Delta Customer Service.
F23
HW COMM1
(HW COMM1)
Internal error. Contact Delta Customer Service.
F22
HW COMM2
(HW COMM2)
Internal error. Contact Delta Customer Service.
F26
HW Connect Fail
(HW Connect Fail)
Internal error. Contact Delta Customer Service.
F42
HW CT A Fail
(HW CT A Fail)
Internal error. Contact Delta Customer Service.
F43
HW CT B Fail
(HW CT B Fail)
Internal error. Contact Delta Customer Service.
F44
HW CT C Fail
(HW CT C Fail)
Internal error. Contact Delta Customer Service.
F01, F02,
F03
HW DC Injection
(HW DC Injection)
The grid waveform is abnormal.
Check the grid waveform. The grid connection
must be far away from non-linear loads; if nec-
essary, move further away.
Internal error. Contact Delta Customer Service.
F15,
F16,
F17
HW DSP ADC1,
HW DSP ADC2,
HW DSP ADC3
The DC input voltage is less than the minimum
required DC voltage.
Check the DC input voltage on the inverter dis-
play.
There may be insufficient solar irradiation.
Internal error. Contact Delta Customer Service.
F20
HW Efficiency
(HW Efficiency)
Incorrect calibration. Check the accuracy of the voltage and power.
Internal error. Contact Delta Customer Service.
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