error between IPU and ADF

620	Communication
	A break occurred in the connection between the IPU and ADF	• ADF disconnected • ADF defective • IPU harness connection loose, broken • IPU defective • External noise
621	Communication timeout between BCU and finisher
	A break (LOW) signal was received from the finisher.	• Finisher serial cable connection loose, broken • BCU defective • Finisher main board defective • External noise
632	Key/card counter device error 1
	After 1 data frame is sent to the device, an ACK signal is not received within 100 ms, and is not received after 3 retries.	• Serial line from the device to the main machine is unstable, disconnected, or defective
633	Key/card counter device error 2
	During communication with the device, the MCU received a break (Low) signal.	• Serial line from the device to the main machine is unstable, disconnected, or defective
634	Key/card counter device error 3
	The backup battery of the counter device RAM is low.	• RAM backup battery exhausted • Counter device defective
635	Key/card counter device error 4
	After installation of the device a message alerts user to a battery voltage abnormal error.	• Device control board defective • Device control board backup battery defective
636	OSM User Code File Error
	The correct "usercode" file could not be found in the root folder of the SD card because the file is not present, or the existing file is corrupted or the wrong type file.	• Make sure the eccm.mod file is in the root folder of the SD card. Note: The usercode files are created with the User Setting Tool "IDissuer.exe".