Machine room REF terminal not connected to Cartop REF terminal.
Shield on communication cable not connected to REF at both ends.
CAT5 cable between Cartop and COP board not properly connected.
Factory “pig tail” CAT5 cables loose in machine room or cartop.
Either the Machine Room SRU board or the Cartop SRU board is not powered.
Verify the CN- terminal in the machine room connects to the CN- terminal on the cartop.
Verify the REF terminal in the machine room connects to the REF terminal on the cartop.
Verify the N terminal in the machine room connects to the N terminal on the cartop.
Verify the GND terminal in the machine room connects to the GND terminal on the cartop.
Verify the CN+ / CN- pair is shielded and that the shield is connected to REF at both ends.
Check communication status of J21:U0 under MAIN MENU | DEBUG | COMM STATUS. It
should normally be 100% at all times. If it is 100% but then drops when the car runs, it is most
likely a grounding problem.
Unplug the CAT5 cable that goes from the cartop to the COP board. If the F100 fault goes away
with the cable unplugged it may be a bad cable. It might also be that the cable is plugged into
the wrong comport. Verify the CAT5 goes from NET on the Cartop board to NET on the COP
board. For best results, a CAT5 cable with the orange pair cut should be used.
Bring the Cartop SRU board to the machine room and connect it directly to the Machine Room
SRU board. You will need to connect CN+, CN-, M24, and REF. If you have a standard CAT5
cable
1
you can connect it from the MR NET port to the CT NET port. This will provide both
power and CN signals. If the F100 fault goes away during this test then there is a problem in
the wiring. If the F100 fault persists then one or both of the SRU boards is damaged.
1
A standard PC CAT5 cable must be used. The CAT5 cable provided by Smartrise to link the
Cartop and COP SRU boards usually has the internal orange pair cut and will not work for this
test.
To Next Page
Loading...