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Ellen KingSep 1, 2025
How to troubleshoot a dark or non-functional display on a Danfoss Controller?
- BBrianna JacobsSep 1, 2025
If the Danfoss Controller display is dark or has no function, first check the input power source. If the power source is okay, check for any missing or open fuses, or a tripped circuit breaker, following the provided recommendations. Another cause may be no power to the LCP; if this is the case, replace the faulty LCP or connection cable. Also, check for a shortcut on the control voltage (terminal 12 or 50) or at the control terminals and ensure the terminals are wired correctly. Verify you are using the correct LCP (LCP 101 (P/N 130B1124) or LCP 102 (P/N. 130B1107)). Adjust the contrast by pressing [Status] + ?/? to adjust the contrast. If the display (LCP) is defective, replace the LCP or connection cable. For an internal voltage supply fault or defective SMPS, contact your supplier.
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