Warnings; Faults - Delta RPI M50A_120 Installation And Operation Manual

Message
Solar1 High
Solar2 High

10.2 Warnings

Message
Solar1 Low
Solar2 Low

10.3 Faults

Message
AC Current High
Bus Unbalance
Installation and Operation Manual for RPI M50A
10. Error messages and trouble shooting
Possible cause
● Actual Solar1 voltage is over
1000 V .
DC
● Detection circuit malfunction.
● Actual Solar2 voltage is over
1000 V .
DC
● Detection circuit malfunction.
Possible cause
● Actual Solar1 voltage is under the
limit.
● Some devices were damaged inside
solar inverter if the actual Solar1 volt-
age is close to "0".
● Detection circuit malfunction.
● Actual Solar2 voltage is under the
limit.
● Some devices were damaged inside
solar inverter if the actual Solar2 volt-
age is close to "0".
● Detection circuit malfunction.
Possible cause
● Surge occurs during operation.
● Driver for inverter stage is defective.
● Switching device is defective.
● Detection circuit malfunction.
● Not totally independent or parallel
between inputs.
● PV array short to ground.
● Driver for boost is defective or discon-
nected.
● Detection circuit malfunction.
Solution
● Modify the solar array setting, and
make the Voc less than 1000 V
● Check the detection circuit inside
solar inverter.
● Modify the solar array setting, and
make V less than 1000 V
DC
● Check the detection circuit inside
solar inverter.
Solution
● Check the Solar1 voltage connection
to solar inverter terminal.
● Check all switching devices in boost1.
● Check the detection circuit inside
solar inverter.
● Check the Solar2 voltage connection
to solar inverter terminal.
● Check all switching devices in boost2.
● Check the detection circuit inside
solar inverter.
Solution
● Call Delta Support.
● Check the driver circuit in inverter
stage.
● Check all switching devices in inverter
stage.
● Check the detection circuit inside
solar inverter.
● Check the inputs connections.
● Check the PV array insulation.
● Check the driver circuit for boost
inside solar inverter.
● Check the detection circuit inside
solar inverter.
.
DC
EN
.
DC
91