Your model is no longer in manufacture or available. However, I was able to locate the Owners Manual for you. It does not list a CH 01 Error Code, but does list other reasons why your unit want turn ON.
http://www.lg.com/us/support/product/support-product-profile.jsp?customerModelCode=LHD45EL&matchedModelCode=1000001989&searchEngineModelCode=LHD45EL&targetPage=support-product-profile&initialTab=documents#
In the past, I have recommended turning the Master ON/OFF Switch to OFF and unplugging the unit for 12-15 minutes. This will give the unit time to hopefully, reset itself. Then Plug the unit back in and turn the Master ON/OFF Switch to ON. Set the humidity control as you normally would. If it successfully reset itself, it should operate normally.
If you continue to have problems, contact LG Customer Support at 800-243-0000.
Hope this helped you to solve the problem.
Hi,
Here
is a tip that explains what can be happening to make the dehumidifier
show that the bucket is full when it is not.
Dehumidifier
Problem It shows Bucket Full
heatman101
1,848 views
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