11 Error messages and troubleshooting
Installation and Operating Manual for RPI M15A M20A Solar Inverter V1.0 2016-03-18
152
Number
Message
Possible cause of error
Suggestions for troubleshooting
F06,
F08,
F09,
F10
HW NTC1 Fail
,
HW NTC2 Fail
,
HW NTC3 Fail
,
HW NTC4 Fail
Ambient temperature is > 90 °C or < -30 °C.
Check the environment of the installation.
Malfunction of the recognition circuit.
Check the recognition circuit in the
inverter
.
F18,
F19
HW Red ADC1
,
HW Red ADC2
DC input voltage is below the minimum required
DC voltage.
Check the DC input voltage on the inverter dis-
play.
The solar irradiation is possibly too low.
Internal fault.
Consult Delta customer service.
F50
HW ZC Fail
Internal fault.
Consult Delta customer service.
F27
RCMU Fail
Internal fault.
Consult Delta customer service.
F13, F29
Relay Open
Internal fault.
Consult Delta customer service.
F28
Relay Short
Internal fault.
Consult Delta customer service.
Malfunction in the relay driver circuit.
Check the driver circuit in the
inverter
.
F05
Temperature High
The ambient temperature is > 60 °C.
Check the environment of the installation.
F07
Temperature Low
The ambient temperature is < -30 °C.
Check the environment of the installation.
Internal fault.
Consult Delta customer service.