Monaco MAAP-1 User manual

MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 1 of 7
MONACO ENTERPRISES, Inc.
Ground Fault
Troubleshooting Guide
MAAP-1 and MAAP-2 Integrated Radio Transceiver Addressable Fire Alarm
Control Panel
This procedure has been prepared to help isolate the causes of Ground Fault conditions on the
MAAP-1 and MAAP-2 Integrated Radio Transceiver and Fire Alarm Control Panel. This
procedure is provided in three parts. Part One provides troubleshooting for the Main Panel.
Part Two deals with the Backplane and Zone Expansion Cards (ZEC). Part Three deals with
the Analog Addressable Controller (AAC) and Analog Driver Cards (ADC). It is important that
the Troubleshooting be performed in order -- Part One first, proceeding to Part Two, and then
proceeding on to Part Three.
Notes and Warnings:
1. Warning! Do not remove (or replace) the ribbon cable between the main board and the
backplane with ANY power applied. Do not remove (or replace) the Analog Addressable
Controller (AAC) power or RS-422 with ANY power applied.
NOTE: Removing (or replacing) either cable with power on (ac or battery) will
damage the panel. This damage would be outside Monaco’s warranty terms.
2. Warning! Do not remove (or replace) the main ac power fuse, F2, with AC power
applied. Use the AC circuit breaker to power down the panel. Removing or replacing F2
repetitively with ac power applied could damage the fuse holder rendering the panel
inoperative on ac power.
3. During this procedure, you will receive several troubles and COM fail indications. These
are associated with the wiring and expansion cards that you have been required to
remove. This is a normal condition due to the zone supervision circuitry.
4. Check the Analog Addressable Controller (AAC) jumper W3 (above and to the right of
Port 3). There should NOT be a jumper across the pins of W3 on the AAC.
NOTE: Jumper W3 (ground fault detection enable) on the main power supply board
is factory set to the B position and is located near the antenna connection on the
bottom side of the power supply board.
5. Tools Required:
a. Digital Voltmeter (DVOM)

MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 2 of 7
b. Small Flat Blade Screw Drive
c. Extra small Flat Blade Screw Drive
Preliminary Step: eliminate real shorts to earth ground.
1. Remove ac power (do not remove or replace F2 fuse under power), then remove
battery power (F4 fuse) from the panel. (The fuse is located in the top left hand
corner of the M Panel power supply board).
NOTE: Leave the field wiring conductors connected to the M Panel terminals.
2. Measure the resistance of each field wiring conductor on the panel to earth ground.
There must be greater than 500K Ohms from earth ground to any conductor. If
there is greater than 500K Ohms from earth ground to each of the conductors go to
Part One: Troubleshooting the Main Panel.
a. If there is only one field wiring conductor shorted go to step eof this section. If
there is more than one shorted field wiring conductor continue to the next step.
b. If there is less than 500K Ohms from earth ground to more than one conductor,
remove the field wiring to those terminals on the M Panel. Measure the
resistance from earth ground to the M Panel terminals associated to those
conductors. If there is less than 500K Ohms on any panel terminal, without field
wires, go to step fof this section.
c. Measure the resistance from earth ground to one of the conductors. If there is
greater than 500K Ohms select another conductor and repeat this step c. When
all shorts are removed go to step h.
d. Measure the resistance from earth ground to one of the conductors. If there is
less than 500K Ohms go to step g.
e. If there is less than 500K Ohms from earth ground to one conductor, remove the
field wiring to that terminal on the M Panel. Measure the resistance from earth
ground to the M Panel terminal. If there is greater than 500K Ohms go to step g
of this section.
f. If there is less than 500K Ohms from earth ground to the M Panel terminal,
remove all field wiring and measure resistance again. If there is less than 500K
Ohms contact Product Support at Monaco Enterprises for assistance.

MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 3 of 7
g. If there is less than 500K Ohms from earth ground to the conductor, divide the
circuit in half and re-measure until the resistive source is located.
NOTE: A Ground Fault condition on zone wiring can be caused by wire insulation
being exposed where the conductors are making contact with the conduit. It can be
also caused by faulty devices.
H. Repeat troubleshooting until all shorts are eliminated. Reconnect all field wiring
and begin testing again.
Part One: Troubleshooting the Main Panel
1. Remove ac power (do not remove or replace F2 fuse under power), then remove
battery power (F4 fuse) from the panel. (The fuse is located in the top left hand
corner of the M Panel power supply board)
2. Ensure panel is powered down. Disconnect the ribbon cable from J6 on the main
board, this is the cable that connects to the backplane(s). Do not remove or replace
ribbon cable from CPU or backplane with ANY power applied.
3. Apply ac power and re-insert fuse F4. Acknowledge the troubles (COM fails) that
occur because of the disconnected backplane(s).
4. Wait for five minutes to see if the ground fault condition returns. If no ground fault
occurs go to Part Two: Troubleshooting the Backplane and Zone Expansion Cards
(ZEC). If the ground fault recurs, remove ac power and fuse F4 and proceed to
step 5.
5. Ensure panel is powered down. Remove all SLC field wiring from the AAC by
unplugging from each port. Unplug the printer, the remote terminal, and Remote
Display Units (RDU) from the AAC. Apply ac power and re-insert fuse F4.
Acknowledge the troubles (COM fails) that occur because of the disconnected
backplane(s). Wait five minutes to see if the ground fault condition returns. If no
ground fault occurs go to Part Three: Troubleshooting the Analog Addressable
Controller (AAC) and Analog Driver Card (ADC). If the ground fault recurs, remove
ac power and fuse F4 and proceed to step 6.
6. Ensure panel is powered down. Remove and label all remaining field wiring
EXCEPT: Auxiliary Power and RS-422 to the AAC. Remove individual wires from
the terminal block for (Auxiliary Inputs, and Zone 1) leaving RS-422 connected to
AAC. Remove Zone 2, Bell 1 & 2 by unplugging two-piece connector. Remove and

MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 4 of 7
label individual wires for AUX OUT, K1 & K2 connections, and Remote Trouble,
noting polarity, from the main board, (leaving Auxiliary Power connected to AAC).
7. Apply ac power and re-insert fuse F4. Acknowledge all of the troubles that are
annunciated because the Backplane(s), On-Board Zones and Bell circuits have
been disconnected.
8. If the ground fault occurs remove battery cable and connection to the transceiver on
the CPU board, (P3). If the ground fault remains with all wiring disconnected, other
than ac power, contact Monaco Enterprises for a return authorization number for
the MAAP CPU and P.S.
9. If no ground fault occurs, perform the following:
a. Connect the field wiring to the main panel, one circuit at a time (Auxiliary Inputs,
Zone 1 and 2, Bell 1 & 2, Auxiliary Out, Auxiliary Power, and K1 & K2
connections).
b. Wait for five minutes to see if a ground fault occurs.
c. 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.
Additional Troubleshooting: Disconnect the loop from the zone input. Measure the
resistance of each leg of the loop to earth ground. If a short to ground is detected, divide the
circuit in half and re-measure until the source of the short to ground is located.
If a short to ground cannot be detected check the wires for induced AC noise. Set the
DVOM to measure AC. Measure each leg of the loop to earth ground. Then measure
across the loop. If any of the AC measurements are 50 Millivolts, or above, the source of
the induced AC noise must be located. This normally occurs when AC and DC circuits
are run in the same conduit or twisted wire pair has not been used on the field wiring. To
reduce the AC noise, separate the wiring or install twisted wire pair and ensure all
conduit runs are bonded to earth ground.
d. If no ground fault occurs, then re-connect the next circuit.

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.

MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 6 of 7
c. Measure from earth ground to each side Mini Module input from conventional
NAC devices. If the resistance is less that 500K Ohms remove defective device
or defective Mini Module.
d. Reconnect SLC loop to AAC port and verify no ground fault condition exists
before proceeding to step 2.
e. Swap ADC card to eliminate a possible defective card.
f. Try another SLC loop on another AAC port, just in case the port is defective.
Note: Connecting and disconnecting SLC loops to ports may be performed with panel
powered up. However the panel could reset during a reconnection if a large number of
devices is present on the SLC loop.
2. Reconnect another SLC field wiring loop to another port. Wait five minutes, if no ground
fault occurs then repeat step 2.
d. If a ground fault occurs, a ground fault condition exists in the field wiring that was
just connected. Remove SLC loop from ADC port. Temporarily connect SLC
loop across conventional loop End of Line resistor, observing polarity. Ensure no
conventional field wiring is present. If no ground fault occurs temporarily connect
another SCL loop across another conventional loop End of Line resistor.
e. If a ground fault occurs, temporarily connect only one side of the SLC loop
across conventional loop End of Line resistor. Ensure no conventional field
wiring is present. If no ground fault occurs remove that half of the loop and
connect the other side.
f. If a ground fault occurs, a ground fault condition exists in the field wiring that was
just connected. Temporarily connect SLC loop across conventional loop End of
Line resistor, observing polarity. Ensure no conventional field wiring is present.
g. If a ground fault occurs, a ground fault condition exists in the field wiring that was
just connected. Remove SLC loop from port. Temporarily connect SLC loop
across conventional loop End of Line resistor, observing polarity. Ensure no
conventional field wiring is present.
3. Continue until all of the SLC loop circuits have been re-connected. If no ground fault
occurs contact Product Support at Monaco Enterprises for assistance.

MAAP Ground Fault Troubleshooting Guide Rev C.wpd Page 7 of 7
Additional SLC LOOP Troubleshooting: Disconnect the SLC loop from the port. Measure
the resistance of each leg to earth ground. There must be greater than 500K Ohms from earth
ground to either loop conductor.
a. If there is less than 500K Ohms from earth ground to one loop conductor, divide the
circuit in half and re-measure until the resistive source is located.
b. Any conventional detector must have greater than 500K Ohms between earth
ground and either line of the input to the mini module.
c. If no ground fault occurs, then re-connect the next circuit.
d. 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.