Carbon Management (CMS) Inverter Repair

CMS inverter repairThe CMS range of Grid Connect inverters have a checkered history, once the designed faults are fixed the inverter performs admirably..

Unfortunately the manufacturer of CMS inverter range is in receivership, which leaves anybody with a CMS inverter out of luck when it comes to warranty. The CMS solar inverter is known to have a few problems, but they are fixable. The CMS Solar inverter is a pretty efficient unit when it is working, so there is no real need to go out and buy a new inverter when trouble strikes.

 

There are two options if your Sunnyroo solar inverter has stopped working.

  • Option 1: Purchase a new Inverter.
  • Option 2: Get the Inverter Repaired.

Option 1: Purchasing a new Inverter to replace the CMS.

If you decide you want to purchase a new inverter, then we suggest the following inverter choices. We base this on knowing the inverters below will just plug straight into your existing CMS installation, which means your electrician will easily do the swap over for you.

Option 2: Get the CMS Solar Inverter Repaired

This is where we can help.. the process is straight forward. You will need to arrange for an electrician to get the inverter off the wall and into a box; once done we will arrange a courier to pick it up and send it to us, we will fix it, and have it sent back to you – the whole process takes about 14 days from pickup to drop off.
Below are some of the most common CMS inverter faults we find:

Relay Fault
The output relay fault is a very common problem; sometimes it means the relays need to be replaced, sometimes it will be the output filter capacitors collapsing; either way the inverter will need to be sent to us for repair.
There is no life in the inverter
By this I mean there is nothing on the screen, no lights are on. This will be the internal power supply on the inverter; the power supply is famous for collapsing prematurely. The good news is we can refurbish the power supply and get it working properly, while we are fixing the power supply we will also make a few minor modifications to it so it will last longer
Grid Fault
The CMS Solar inverter will go through the startup sequence, start delivering power, then disconnect with a Grid Fault.
This is not a hardware fault, it is a software fault, the fix is easy enough, you need to log into the CMS inverter with a piece of software and modify the grid parameters.

Send your Inverter for Repair

Common Fault Codes

 

System Fault
LCD Display Possible Actions
Isolation Fault 1. Check the impedance is between PV (+) & PV (-) and the PV-Inverter is earthed. The impedance must be greater than 8MΩ
2. If the problem persists please call service
Ground I Fault 1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the peripheral AC system
3. After the cause is cleared, re-plug the PV panel and check PV-Inverter status.
4. If the problem persists please call service.
Grid Fault 1. Wait for 5 minutes, if the grid returns to normal, PV-Inverter automatically restarts.
2. Make sure grid voltage and frequency meet the specifications
3. If the problem persists please call service
No Utility 1. Grid is not connected.
2. Check grid connection cables.
3. Check grid usability.

Inverter Failure

LCD Display Possible Actions
PV over Voltage 1. Check the open PV voltage, see if it is greater than or too close to 500VDC
2. If PV voltage is less than 500VDC, and the problem still occurs, please call local service.
Consistent Fault 1. Disconnect PV (+) or PV (-) from the input, restart the PV-Inverter
2. If it does not work, call service .
Over Temperature 1. The internal temperature is higher than specified normal value
2. Find a way to reduce the ambient temperature.
3. Or move the inverter to a cooler environment 4. If it is not effective, call local service.
Relay Failure 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
DC INJ High 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
EEPROM Failure 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
SCI Failure 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
High DC Bus 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
Low DC Bus 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
Ref 2.5V Fault 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
DC Sensor Fault 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service
GFCI Failure 1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears call your local service

For more information regarding this inverter click on the link below to view the user manual

Carbon Management (CMS) Inverter