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SolarEdge CSS OD Aux Power board for EMS
replacement - Support kit manual
This manual describes the procedure for replacing the Auxiliary power board in the Battery
cabinet of the CSS OD.
Revision history
Version 1.0, November 2024: Initial release
Kit contents
HMI Auxiliary power board PN: FLD-CSS-OD-BC-HMIAX-01
Required tools
Insulated tools
Insulated gloves
Insulated shoes
Shut down the system
There are two versions of the system: On-grid system and the Backup Interface (BUI) system.
The procedure for shutting down the system differs depending on the installed system.
On-grid system
Turn off all AC circuit breakers supplying the battery cabinet and the air conditioner.
Shut down the Battery inverter
At the bottom of the battery inverter, turn OFF (counterclockwise) the two (2) black PCS DC
switches.
SolarEdge CSS OD Aux Power board for EMS replacement
Version 1.0, November 2024
1
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Summary of Contents for SolarEdge FLD-CSS-OD-BC-HMIAX-01
- Page 1 Turn off all AC circuit breakers supplying the battery cabinet and the air conditioner. Shut down the Battery inverter At the bottom of the battery inverter, turn OFF (counterclockwise) the two (2) black PCS DC switches. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 2 Shut down the Battery cabinet 1. Open the battery cabinet door and keep it open using the support bar located inside the cabinet. 2. Turn off the two red and grey high voltage switches. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 3 3. Turn off the two blue AC switch (move it to the right). 4. Turn OFF both red DC switches by moving them to the right. When the circuit breaker switches are turned OFF, the High Voltage Box indicator light is OFF. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 4 5. Ensure that the inverter indicator lights are OFF. 6. Disconnect the black cables from the top of the battery strings on both sides of the battery cabinet, as shown below. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 5 1. Turn off the grid AC circuit breakers supplying the BUI. 2. Open the Backup Interface (BUI) door and keep it open using the support bar located inside as shown in the picture below. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 6 5. Lock the door using the key provided. Shut down the Battery inverter Refer to the steps in Shut down the Battery inverter. Shut down the Battery cabinet Refer to the steps in Shut down the Battery cabinet. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 7 LCD screen. 2. Remove the rear cover. 3. Disconnect connectors 1, 2, and 3. 4. Using a Philips screwdriver, loosen the four screws on the auxiliary power board. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 8 7. Insert and tighten the screws using a Phillips screwdriver. 8. Reconnect connectors 1, 2, and 3. 9. Place the rear cover back in position. 10. Insert and tighten the screws using a Phillips screwdriver. SolarEdge CSS OD Aux Power board for EMS replacement...
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Page 9: Power On The System
2. Reconnect the black cables at the top of the battery strings on both sides of the battery cabinet, as shown below. WARNING! Be aware that each individual battery is still “live” at 52V. 3. Turn ON the two red circuit breakers. SolarEdge CSS OD Aux Power board for EMS replacement... - Page 10 4. When these circuit breakers are turned ON, the High Voltage Box indicator lights are ON. 5. Turn on the blue AC switch (move it to the left). 6. Turn on the two red and grey high voltage switches. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 11 7. Remove the support bar keeping the door open and close the battery cabinet door. Power on the Battery inverter 1. At the bottom of the battery inverter, turn ON the two (2) black PCS DC switches. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 12 1. Unlock the door using the key provided. 2. Open the Backup Interface (BUI) door and turn the door handle 90º counterclockwise. 3. Turn on the circuit breaker switches labeled QAC1, QAC2, QPCS1, QPCS2. SolarEdge CSS OD Aux Power board for EMS replacement...
- Page 13 4. Remove the support bar keeping the door open and close the BUI door and as shown in the picture below. 5. Turn on the grid AC circuit breakers supplying the BUI. SolarEdge CSS OD Aux Power board for EMS replacement...
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