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