When the CH38 error code shows up on the display of your LG inverter aircon, that means a phase current abnormality is detected by the system. The abnormality or irregular phase current can result from a lightning storm, electrical fluctuations, or power connection imbalances. Since the CH38 error, on the surface, looks like a purely electrical fault, then it should be treated with utmost urgency. The malfunction could be in the indoor or outdoor PCB terminals and their associated wiring; and if left uncorrected, other parts of the air conditioning unit might be affected, too.
The LG inverter aircon is known for its excellent energy-efficient design; the compressor speed is controlled by the inverter and can slow down or go fast depending on the cooling needs of your living space–a feature you’d appreciate if you once tried manually calculating your HDB flat’s aircon BTU requirements. The CH38 error could end up affecting this remarkable energy-efficient capability of your LG inverter air conditioning unit.
Resetting the circuit breakers and doing a manual reset of the LG inverter aircon might be enough to get rid of residual electrical charges in the system and resolve the CH38 error. It might also help to refer to the Energy Market Authority of Singapore’s primer on home electrical safety, most importantly on the proper handling of circuit breakers.
To begin troubleshooting the issue (or any other LG aircon error codes), turn off the LG inverter aircon, and disconnect it from the power source. Remove the AC covers of both the indoor and outdoor sub-units. Clean the interior parts systematically, paying attention to loose wiring jacks, burnt terminals, and other signs of damage. Clean and check the PCB mainboards in both the indoor fan coil unit and the outdoor unit. Once you’re sure that nothing is amiss and out of place, plug the LG inverter aircon back in and restart it. The CH38 error should have already been cleared from the system at this point. If not, then consider looking for expert help.
Silverback Aircon has dealt with multiple LG inverter aircon installation, maintenance, and repair jobs in the past. Fixing your persistent CH38 error might be as straightforward as simply replacing defective PCBs with perfectly working ones from our collection of refurbished LG spare parts.
And, if any of your LG aircon PCBs is behind the CH38 error code on the indoor unit display, Silverback Aircon will replace the circuit box that contains the set of PCBs corresponding to your LG inverter aircon’s condenser model. Three types of PCBs–control board, power board, and noise filter–exist in the LG aircon condenser model A4UQ30GFA0. In the LG condenser model AMNC09GDBA2, however, only two PCBs–control board and power board–are used. Silverback Aircon’s brilliant, tactical and cost-effective solution is to put in a circuit box, containing all the PCBs, and not just replace a damaged PCB.
The following table summarizes the cost of replacing damaged PCBs on an LG inverter aircon.
Restore the optimal working conditions of your LG inverter aircon by clearing the CH38 defect fast. It might simply be just a matter of identifying and replacing a malfunctioning PCB, which is something that Silverback Aircon is capable of doing. Consult with us for free over Whatsapp. And don’t forget to note the model number of your indoor AC unit (from the sticker attached to the fan coil unit) and the model number of the condenser unit (from the invoice sticker) before you call us; we need the information to correctly diagnose the issue and give you a quote on the possible cost of repair and parts replacement in case you decide to book an appointment with us.
