MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 5 of 7
e. Continue until all of the main panel circuits have been re-connected. If no ground
fault occurs contact Product Support at Monaco Enterprises for assistance.
Part Two: Troubleshooting the Backplane and Zone Expansion Cards (ZEC)
1. Remove ac power, then battery power (F4 fuse) from the panel. Re-connect the ribbon
cable to J6 on the main board.
Note: Do not remove any field wiring attached to the backplane at this time.
2. Apply ac power and re-insert fuse F4. If a ground fault occurs remove fuse F4 and
remove ac power. Remove all of the expansion cards installed in the backplane(s).
3. Apply ac power, re-insert fuse F4, and acknowledge all Troubles.
4. If no ground fault occurs remove ac power, then battery power fuse F4 from the panel.
Install one ZEC card in one slot. If a ground fault occurs proceed to step 7.
5. If no ground fault occurs remove ac power, then battery power fuse F4 from the panel.
Install another ZEC card in another slot.
6. Apply ac power and re-insert fuse F4. If a ground fault occurs remove and label all field
wiring from the zone inputs associated with the installed ZEC card. If no ground fault
occurs, then re-connect the next circuit.
a. If a ground fault occurs, a ground fault condition exists in the field wiring that was
just connected and/or the devices connected to it. Correct the ground fault in the
field wiring. Note: A Ground Fault condition on zone wiring can be caused by
conditions such as 1) wire insulation being exposed where the conductors are
making contact with the conduit, 2) induced ac noise where the zone wire is run
next to or over ac power wiring, or 3) faulty devices.
Part Three: Troubleshooting the Addressable (AAC)
1. Reconnect one SLC field wiring to one port. Wait five minutes, if no ground fault occurs
then proceed to step 2.
a. If a ground fault occurs, remove SLC loop from the port. If resistance from earth
ground to either side of the SLC loop is less than 500K Ohms, divide the circuit
in half and re-measure until the source of the short to ground is located. If
resistance is greater than 500K Ohms proceed to step c.
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