A blank controller display (nothing on display, buttons not lit up) may be due to a variety of causes. Start by resetting the controller power. If the display is still blank, proceed with the rest of the troubleshooting steps.
Troubleshooting
Possible Cause | Component to Check | Recommended Action |
Loose display connector | Display connector (white connector on the J7 terminal) | Apply force to push in connector firmly on both ends. |
Display safety trip | Overvoltage over normal or generator operation | Reset controller power. If issue returns periodically, verify generator voltage: 187-252VAC. |
No power to controller | Power Supply LED/J1 Connector | Verify 24VDC Power supply across J1connector (orange). If controller module LED is still dark after DC power is verified and no physical damage on J1 connector, replace the controller module 1. |
Shorted ethernet cables (Cat 5 models only) | Ethernet cables | Unplug the cables and reset the breaker. If the display lights up, check the cables for shorts. |
Failed AC/DC Converter | AC/DC Converter | Verify 24VDC leaving the converter. |
Display/Connector/Cable Failure | Display/Cable assembly | Move the display to controller module 2. If display lights up then Controller module 1 display port (J7) is bad, so replace controller module 1. If display remains dark, replace display and cable assembly. |