Delta RPI M50A_120

93
Installation and Operation Manual for RPI M50A
10. Error messages and trouble shooting
EN
Message Possible cause Solution
HW CT A Fail ● Test current loop is broken. ● Check the connection of CNP4 to
CNM4.
● CTP3 is defective. ● Replay CTP3 with new one.
● Detection circuit malfunction. ● Check the detection circuit inside the
solar inverter.
HW CT B Fail ● Test current loop is broken. ● Check the connection of CNP4 to
CNM4.
● CTP4 is defective. ● Replace CTP4 with new one.
● Detection circuit malfunction. ● Check the detection circuit inside the
solar inverter.
HW CT C Fail ● Test current loop is broken. ● Check the connection of CNP4 to
CNM4.
● CTP5 is defective. ● Replace CTP5 with new one.
● Detection circuit malfunction. ● Check the detection circuit inside the
solar inverter.
HW DC Injection ● Utility waveform is abnormal. ● Check the utility waveform. Grid con-
nection of inverter needs to be far
away from non-linear load if neces-
sary.
● Detection circuit malfunction. ● Check the detection circuit inside
solar inverter.
HW DSP ADC1
HW DSP ADC2
HW DSP ADC3
● Insufcient input power. ● Check the input voltage, must >
150 V
DC
.
● Auxiliary power circuitry malfunction. ● Check the auxiliary circuitry inside the
solar inverter.
● Detection circuit malfunction. ● Check the detection circuit inside the
solar inverter.