Delta RPI-M20A Manual

55
!
HW AC OCR
1. Large Grid harmonics
2. Switching device is defective
3. Detection circuit malfunction
1. Check the utility waveform. Grid connection of
inverter need to be far away from non-linear
load if necessary
2. Check all switching devices in inverter stage
3. Check the detection circuit inside the inverter
HW ZC Fail
The detection circuit for
synchronal signal malfunction
Check the detection circuit for synchronal signal
inside the inverter
DC Current
High
1. Switching device in boost is
defective
2. Driver for boost is defective
3. Input current detection circuit
malfunction
1. Check all switching device in boost
2. Check the driver curcuit for boost inside the
inverter
3. Check input current detection circuit
10. De-Commissioning
10.5 De-Commissioning Procedure
If it is necessary to put the RPI-M8/ M10/ M12/ M15/ M15A/ M20/ M20A/ M30 out
of operation for RMA or maintenance, please follow the instruction below.
WARNING！Death and serious injuries may occur.
To avoid injuries, please follow the procedures below:
1. Switch off AC circuit breaker to disconnect with electricity grid.
2. Switch off DC switch to disconnect with DC source.
3. Switch off the PV Array switch to disconnect with PV Array.
4. Use proper voltage meter to confirm that the AC and DC power
present totally absent.
5. Remove the AC wiring immediately to completely disconnect
with electricity grid.
6. Remove the DC wiring to disconnect with PV Array.
7. Remove the Communication module RS-485 with the computer
connection.
After finishing all the procedures, user can remove the RPI-M8/ M10/ M12/ M15/
M15A/ M20/ M20A/ M30.

Delta RPI-M20A Specifications

General

Brand	Delta
Model	RPI-M20A
Category	Inverter
Language	English