dover t-3 duplex, #1 car has group cpu. with bothcars on hall service is ok. with #1 off no hall service. watchdog light on group cpu goes out with #1 off. all power supplies on both cars ok. how does the group cpu get power from #2 car? cliff

-- cliff smith (cliff77@att.net), March 15, 2002

Answers

does your car have a hcp modual ? if so i check there first

jag

-- jag (gipp01@yahoo.com), March 16, 2002.

Response to t-3

Without having prints my guess is that you are missing one or more cross connects.

-- Fred Baltes (Elman101@pacbell.net), March 18, 2002.

Without seeing the prints this is a guess. There should be a transfer relay that applies power to the dispatch even with the cars mainline off. Check cross connects check for fuse protection on both controllers and make sure that the cpu,and I/o switches are not turned off. Jerry Ferro Maryland Elevators

-- Jerry Ferr0 (jferro@erols.com), May 28, 2003.