I received this same error code (524223-1) on a Yale GLC120. Our forklift would start and run, but if moved even 5 feet forward or reverse it would shut down. In another post here on Forklift Action the official trouble shooting procedure for this error is provided and its first recommendation is to verify that the transmission fluid level is not low. I checked the trans fluid on mine and indeed it was very low. I filled with Universal Tractor Trans-Hydraulic fluid (recommended for our unit) and the error code had disappeared and the forklift began running fine again.