The LG aircon error code CH05 indicates a fault that disrupts the communication between the indoor and outdoor sub-units. Your ceiling-mounted LG aircon might have a circuit breaker that is separated from the outdoor unit’s circuit breaker. If the error starts appearing right after a power surge, then that immediately narrows down the source of the problem; you can go through the usual power-down-and-reset steps or call a service technician right away.
All in all, the LG aircon CH05 error points to a defect in a relatively broad area of interconnected parts that only HVAC specialists can understand. In some cases, however, routine troubleshooting helps because sometimes the CH05 fault resolves on its own after a manual reset.
To troubleshoot a CH05 error on an LG aircon, simply turn off the unit, disconnect it from the power source, and remove the AC covers, if you are able, for both the outdoor and indoor units. Check the wiring system for loose jacks or severed connections. Look for signs of damage such as burnt terminals or corrosion. Then remove any dirt or debris, especially on the PCB mainboards and their respective aircon capacitors. If nothing else is amiss, replace the AC cover of each unit and then plug the aircon back in. Restart the unit and check to see if the CH05 error code has been finally cleared from the display.
If it’s still there, contact a service technician. Allowing a possible electrical fault to linger in your air conditioning system might be risky. And, for more electrical safety information, including handling circuit breakers in your home, the Energy Market Authority of Singapore recommends these safety practices.
If any of your LG aircon PCBs is found to be defective and is behind the CH05 error code on the indoor unit display, Silverback Aircon can quickly replace the entire circuit box that houses the set of PCBs corresponding to your specific condenser model. Three types of PCBs–control board, power board, and noise filter–are used in the LG aircon condenser model A4UQ30GFA0. In the LG condenser model AMNC09GDBA2, however, only two PCBs–control board and power board–exist. Silverback Aircon’s hassle-free solution is to put in a perfectly working circuit box, containing all the PCBs, and not just replace a potentially damaged PCB.
If any of your LG aircon PCBs The following table gives the estimated prices of the AC parts that might need to be replaced in order to correct the abnormal communication detected between the indoor and outdoor sub-units of your LG inverter air conditioning unit.
Aside from LG model-specific PCBs, Silverback Aircon also carefully maintains and inventories a collection of other refurbished LG aircon spare parts which can be used to fix all other issues on your LG aircon.
Silverback Aircon maintains a Whatsapp account for conducting free professional consultation with aircon users all over Singapore. We have a ready, tried-and-tested fix for your LG aircon CH05 error code, as well as for any problems related to other LG aircon error codes. Talk to us anytime. And don’t forget to write down the model number of your indoor AC unit (refer to the sticker attached to the fan coil unit) and the model number of the condenser unit (refer to the invoice sticker) before you call us; we need the information to properly diagnose the issue and give you a quote on the possible cost of repair and parts replacement.
