The inverter should be updated locally using the SolisCloud Bluetooth tool during commissioning. Please see pages 62-63 of the Solis S6 HV Home Energy Storage Inverter Manual for instructions on how to do this. If the local upgrade attempts keep failing, escalate to L2 to try and update the firmware remotely.
DSP_Comm-Fail alarm Troubleshooting Steps
This alarm will occur if the DSP firmware or board got corrupted.
Troubleshooting Steps:
1. Escalate to L2 because the first step is to update the DSP firmware
2. Update the inverter DSP firmware and then wait about ten minutes after the update finishes to make sure the alarm clears.
3. If the alarm does not clear, power cycle the inverter. Turn off both AC and DC power to the inverter until all LEDs turn off. Then turn the inverter back on.
4. If the alarm still does not clear or continues to persist, we will need to physically check the DSP board by following the steps outlined below.
5. After checking the board, turn the inverter on. If the alarm continues to persist, replace the DSP board.
6. Turn the inverter on after replacing the DSP board, if the alarm still persists then RMA the inverter.
Checking the DSP Board
Step 1: Power down the inverter completely, turn off AC and PV and the battery.
Step 2: Remove the inverter wire box cover by using a Torqx T20 screwdriver to loosen the four screws holding the cover on.
Step 3: After removing the wire box cover, remove the four T20 screws holding the bottom of the top cover on circled below.
Step 4: Remove the three T20 screws on the top of the inverter circled in the photo below. Use a flat screwdriver to press in the two tabs at each corner of the top.
Step 5: Remove the cover, be careful to unplug the cable going to the back of the top cover. Locate the DSP board shown in the red box in the photo below.
Step 6: Gently push the DSP board evenly on both sides into the inverter to ensure it is seated fully. Then replace the inverter covers, reinstalling all T20 screws.
Step 7: Turn the inverter on and wait for the system to operate normally. If the alarm still persists, the DSP board will need to be replaced.
Replacing the DSP Board
At Step 6 instead of pushing the DSP board in, pull the DSP board out by pulling evenly straight out with two hands on each side of the board.
After that, insert the new board being very careful to line up the pins into the holes properly. Push the board in firmly before replacing the inverter covers.
