Pittway Notifier AM2020 User manual

AM2020/AFP1010
Troubleshooting
Guide
DOCUMENT NUMBER 50432
8/13/97 REVISION:A
50432:A ECN 97-333
12 Clintonville Road
Northford, CT 06472
Phone: [phone]
Fax: [phone]
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WARNING: This equipment generates, uses, and can radiate radio frequency
energy and if not installed and used in accordance with the instruction manual, may
cause interference to radio communications. It has been tested and found to comply
with the limits for class A computing device pursuant to Subpart B of Part 15 of FCC
Rules, which is designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user will be required
to correct the interference at his own expense.
Installation Precautions - Adherence to the following will aid in problem-free installation with long-term reliability:
WARNING - Several different sources of power can be connected to the fire alarm
control panel. Disconnect all sources of power before servicing. Control unit and
associated equipment may be damaged by removing and/or inserting cards,
modules, or interconnecting cables while the unit is energized. Do not attempt to
install, service, or operate this unit until this manual is read and understood.
CAUTION - System Reacceptance Test after Software Changes: To ensure
proper system operation, this product must be tested in accordance with NFPA 72-
1993 Chapter 7 after any programming operation or change in site-specific software.
Reacceptance testing is required after any change, addition or deletion of system
components, or after any modification, repair or adjustment to system hardware or
wiring.
All components, circuits, system operations, or software functions known to be
affected by a change must be 100% tested. In addition, to ensure that other
operations are not inadvertently affected, at least 10% of initiating devices that are
not directly affected by the change, up to a maximum of 50 devices, must also be
tested and proper system operation verified.
This system meets NFPA requirements for operation at 0-49OC/32-120OF
and at a relative humidity of 85% RH (non-condensing) at 30O C/86OF.
However, the useful life of the system's standby batteries and the electronic
components may be adversely affected by extreme temperature ranges and
humidity. Therefore, it is recommended that this system and its peripherals be
installed in an environment with a nominal room temperature of 15-27OC/60-80O
F.
Verify that wire sizes are adequate for all initiating and indicating device loops.
Most devices cannot tolerate more than a 10% I.R. drop from the specified device
voltage.
Like all solid state electronic devices, this system may operate erratically or can
be damaged when subjected to lightning induced transients. Although no system is
completely immune from lightning transients and interferences, proper grounding will
reduce susceptibility. Overhead or outside aerial wiring is not recommended, due to
an increased susceptibility to nearby lightning strikes. Consult with the Technical
Services Department if any problems are anticipated or encountered.
Disconnect AC power and batteries prior to removing or inserting circuit boards.
Failure to do so can damage circuits.
Remove all electronic assemblies prior to any drilling, filing, reaming, or punching
of the enclosure. When possible, make all cable entries from the sides or rear.
Before making modifications, verify that they will not interfere with battery,
transformer, and printed circuit board location.
Do not tighten screw terminals more than 9 in-lbs. Over tightening may damage
threads, resulting in reduced terminal contact pressure and difficulty with screw
terminal removal.
This system contains static-sensitive components. Always ground yourself with a
proper wrist strap before handling any circuits so that static charges are removed
from the body. Use static suppressive packaging to protect electronic assemblies
removed from the unit.
Follow the instructions in the installation, operating, and programming manuals.
These instructions must be followed to avoid damage to the control panel and
associated equipment. FACP operation and reliability depend upon proper
installation.
Fire Alarm System Limitations
While installing a fire alarm system may make lower insurance
rates possible, it is not a substitute for fire insurance!
An automatic fire alarm system - typically made up of smoke detectors, heat
detectors, manual pull stations, audible warning devices, and a fire alarm control
with remote notification capability can provide early warning of a developing fire.
Such a system, however, does not assure protection against property damage or
loss of life resulting from a fire.
Any fire alarm system may fail for a variety of reasons:
Smoke detectors may not sense fire where smoke cannot reach the detectors such
as in chimneys, in walls, or roofs, or on the other side of closed doors. Smoke
detectors also may not sense a fire on another level or floor of a building. A second
floor detector, for example, may not sense a first floor or basement fire. Further-
more, all types of smoke detectors - both ionization and photoelectric types, have
sensing limitations. No type of smoke detector can sense every kind of fire caused
by carelessness and safety hazards like smoking in bed, violent explosions,
escaping gas, improper storage of flammable materials, overloaded electrical
circuits, children playing with matches, or arson.
IMPORTANT! Smoke detectors must be installed in the same room as the
control panel and in rooms used by the system for the connection of alarm
transmission wiring, communications, signaling, and/or power. If detectors are
not so located, a developing fire may damage the alarm system, crippling its
ability to report a fire.
Audible warning devices such as bells may not alert people if these devices are
located on the other side of closed or partly open doors or are located on another
floor of a building.
A fire alarm system will not operate without any electrical power. If AC power fails,
the system will operate from standby batteries only for a specified time.
Rate-of-Rise heat detectors may be subject to reduced sensitivity over time. For
this reason, the rate-of-rise feature of each detector should be tested at least once
per year by a qualified fire protection specialist.
Equipment used in the system may not be technically compatible with the control.
It is essential to use only equipment listed for service with your control panel.
Telephone lines needed to transmit alarm signals from a premise to a central
monitoring station may be out of service or temporarily disabled.
The most common cause of fire alarm malfunctions, however, is inadequate
maintenance. All devices and system wiring should be tested and maintained by
professional fire alarm installers following written procedures supplied with each
device. System inspection and testing should be scheduled monthly or as required
by National and/or local fire codes. Adequate written records of all inspections should
be kept.
FCC Warning
Canadian Requirements
This digital apparatus does not exceed the Class A limits for radiation noise
emissions from digital apparatus set out in the Radio Interference Regulations of the
Canadian Department of Communications.
Le present appareil numerique n'emet pas de bruits radioelectriques depassant les
limites applicables aux appareils numeriques de la classe A prescrites dans le
Reglement sur le brouillage radioelectrique edicte par le ministere des Communica-
tions du Canada.
Technical Publishing Document PRECAULG.PM6 12/31/96
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 3
Table of Contents
Section One: Introduction ........................................................................................... 4
Removing and Reapplying Power to the AM2020/AFP1010 ....................................................................... 4
Static PrecautionsWhenWorking with the AM2020/AFP1010.................................................................... 4
Section Two: AM2020/AFP1010 Hardware................................................................... 5
Ground Fault............................................................................................................................................... 5
The Affects of Multiple Impedances to Earth Ground............................................................................................. 6
The Affects of Capacitance on Ground Fault.......................................................................................................... 7
Low ChamberValue.................................................................................................................................... 9
Maintenance Required / Pre-Alarm Alert .................................................................................................... 9
Catastrophic LIB Communications Fault from a Consecutive Group of LIBs............................................. 10
Drift Compensation Error .......................................................................................................................... 10
Invalid Replies from All Devices on Every SLC Loop ................................................................................ 12
Intermittent Invalid Reply .......................................................................................................................... 12
DisplayTrouble LED Illuminated, Piezo Sounding Steadily, and AC LED Flashing.................................... 13
Short Circuit from a Control Module or XPC Point .................................................................................... 13
Open Circuit from a Control Module or XPC Point .................................................................................... 13
Constant Invalid Reply .............................................................................................................................. 14
Invalid Reply from an XP Transponder Point ............................................................................................. 14
What Does the Switch (SW1) on the CPU Board Do? .............................................................................. 15
WhatType ofTransient Protection Does the AM2020/AFP1010 Have? .................................................... 16
What is the MPS-TR Used For? ............................................................................................................... 16
Can I Reset the AM2020/AFP1010 From a Key Switch? .......................................................................... 16
SectionThree: AM2020/AFP1010 Software .............................................................. 17
Possible Causes for Software Related Problems ...................................................................................... 17
The System Will Not Accept Any New Programming Information ............................................................. 17
The System Loses all Programmed Information ....................................................................................... 17
The Operator Gets Kicked out of Programming EveryTime a New Point is Added................................... 18
The Piezo Sounder Continues to Beep After All Events Have Been Acknowledged ................................. 18
What is the Difference between a Forward-Activated and a Reverse-Activated Zone? ............................. 19
Forward Activated Zones ...................................................................................................................................... 19
Reverse Activated Zones...................................................................................................................................... 19
How Does the "OR" FunctionWork? ........................................................................................................ 20
How Does the "AND" FunctionWork? ...................................................................................................... 21
How Does the "NOT" Function Work? ...................................................................................................... 21
How Does the "XZONE" FunctionWork?.................................................................................................. 22
How Does the "DEL" FunctionWork? ....................................................................................................... 23
How Does the "TIM" FunctionWork?........................................................................................................ 24
How Does the "SDEL" FunctionWork....................................................................................................... 24
What is Day/Night Sensitivity? .................................................................................................................. 26
What Does "DoYou Want to Modify NFPA Listings" Mean? ...................................................................... 26
Section Four: Serial Communications......................................................................28
CRTTerminal Does Not Display Any Data................................................................................................ 28
The CRT Displays Information But Does NotTransmit Any Keyboard Input to the Panel .......................... 28
After Adding the SIB to the PanelThe EIA-232 InterfaceWorks But the EIA-485 Does Not ..................... 29
Password Cannot be Entered and System Seems to Enter Characters by Itself ...................................... 29
Can I Map a Detector or Module to MoreThan One Annunciator Point?................................................... 29
How Far From the Panel Can the CRT or Printer Be Located? ................................................................. 30
Can the EIA-232Terminal Connection be Used on the SIB-NET/SIB-2048/SIB-2048A to Program?........ 30
Section Five: AM2020/AFP1010Trouble Codes .......................................................31
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
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Section One:
Introduction
This troubleshooting guide addresses typical AM2020/AFP1010 hardware and
software issues drawn from the Notifier Technical Services Department through
customer input and experiences. This guide is not all encompassing; situations
may occur that cannot be accurately accounted for when troubleshooting an
AM2020/AFP1010 installation, and in that case, contact your Notifier Service
Representative for assistance at 1-800-454-9779.
When working on the AM2020/AFP1010, the typical power down sequence
should consist of the following steps:
1) Remove any SIB field wiring.
2) Disconnect the battery connection from the main power supply, MPS-24A
TB2 terminals 1(+) and 2(-).
3) Shut off all sources of AC power from the panel.
4) Allow the panel to discharge for approximately one minute before connect-
ing or disconnecting any ribbon cables or harnesses or removing or adding
any circuit boards.
When reapplying power, always reconnect AC power before reconnecting the
batteries. Failure to follow this procedure may result in damage to the panel or
loss of programming. The following steps must be completed to reapply power to
the AM2020/AFP1010:
1) Connect all internal cables and components.
2) Apply AC power.
3) Connect batteries.
4) Reconnect any SIB field wiring.
When handling a printed circuit board or removing or installing EPROMs, proper
static precautions must be observed. This includes wearing a grounding strap
and clipping it to an appropriate ground point so that any potential in your body
may be safely discharged to earth.
Removing and Reapply-
ing Power to the
AM2020/AFP1010.
Static Precautions When
Working on the AM2020/
AFP1010.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 5
SectionTwo:
AM2020/AFP1010 Hardware
A Ground Fault is an unintentional connection of one or more system conductors
(wires, equipment electronics, etc.) to some object which is electrically tied to
earth ground. This connection may be direct contact, capacitive coupling,
inductive coupling, or any combination of these things.
Note: The sensitivity threshold of the ground fault detection circuit on the MPS-24A Power
Supply is approximately 50,000 ohms. Any single or combined impedance to ground
within the AM2020/AFP1010 system using this supply having less than
50,000 ohms will cause a ground fault.
The MPS-24A uses a 1/4 Hertz, 4.0 Vpp square wave on a 2.0 VDC bias relative
to system common for ground fault detection. This square wave is present on
the cabinet and is referenced to earth ground. A simplified schematic of this
circuit is shown below. Point "a" on the schematic represents the electrical
location of the cabinet which is at earth ground potential.
During a normal condition, the pulse detection circuitry detects the square wave
at the proper peak-to-peak potential (4.0 Vpp) at Point "b" and no ground fault is
indicated.
Figure 2-1: Simplified schematic representation of the
ground fault detection circuit on the MPS-24A
When a conductor from the panel (either a system common conductor or a
voltage carrying conductor) has some low impedance path to earth ground, the
peak-to-peak amplitude of the square wave is reduced and a ground fault is
detected. A schematic representation of what happens when a system common
conductor is faulted to earth ground is shown below.
Figure 2-2: Schematic representation of a negative ground fault
Note: The square wave is
detected at the proper amplitude
so no ground fault is indicated.
Note: The square wave is detected at
an improper amplitude so a ground
fault is indicated.
Ground Fault.
(Also referred to as Earth Fault)
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
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Note: The square wave is detected at
an improper amplitude so a ground
fault is indicated.
In a similar manner, a ground fault will be detected when a voltage carrying
conductor (such as: +5 or +24 VDC) is faulted to earth ground. A representation
of a positive ground fault is shown below.
Figure 2-3: Schematic representation of a positive ground fault
The Affect of Multiple Impedances to Earth Ground
It is important to realize that these paths to ground need not be dead shorts. In
the very common case shown below, multiple seemingly-minor ground faults
combine to exceed the ground fault threshold of the power supply.
The main power supply is shown with it's reference to earth ground (Point "a").
The SLC loop is shown with multiple high impedance paths to ground (Z1, Z2,
Z3, Z4, and Z5) these may result from any number of problems, such as a nick in
the insulation of an SLC loop wire, moisture or water in a backbox or conduit.
Figure 2-4: Schematic representation of a typical ground fault
condition caused by combined impedance
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 7
For the sake of this example, let's assume that each of these impedances to
earth is approximately 200,000 ohms. Since all these impedances have found a
path to earth ground at Points "b","c","d","e", and "f" which are electrically
effectively the same point as Point "a", all these impedances can be considered
to be in parallel. Based on the simple calculations shown, we can see how the
ground fault threshold is indeed exceeded.
Note: Since Z
TOTAL
is less than 50,000 ohms, a ground fault will result.
Figure 2-5: Calculating the parallel impedances of multiple
ground faults
The Affects of Capacitance on Ground Faults
Capacitance can also be a major cause of induced ground faults. For example,
if the capacitance between the conductors of an SLC loop and earth ground
exceed a certain value, the capacitive reactance (XC) will fall below the ground
fault circuit threshold and a ground fault indication will result. When using
shielded cable for the SLC loop wiring, it is important to realize that since a
conductor (the SLC loop wire) is running in close proximity to the shield for a
long distance, it is basically acting as a large capacitor. If the capacitive value is
known, the capacitive reactance can be calculated by using the following
formula;
Where "f" is the frequency (in Hertz) of the ground fault detection circuit, in this
case one-quarter hertz (0.25 Hz) and "C" is the measured capacitance value (in
Microfarads).
Example: If the measured capacitance value is 10 microfarads, the capacitive reactance
will be approximately 63,660 ohms. Since this value does not drop below the threshold of
50,000 ohms, no ground fault will result.
Example: If the measured capacitance value is 15 microfarads, the capacitive reactance
will be approximately 42,441 ohms. Since this value is below the threshold of 50,000
ohms, the result will be a ground fault indication.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
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The capacitive reactance formula can also be used to find the maximum
allowable capacitance before an induced ground fault will result.
solving the formula for C (Capacitance) yields;
substituting the ground fault circuits frequency and threshold;
Figure 2-6: Calculating the maximum allowable capacitance
before a ground fault will be induced
The result is approximately 12.73 microfarads. The capacitive reactance (XC) is
inversely related to the capacitance value. So, as the capacitance goes up, the
capacitive reactance goes down. If it goes below 50,000 ohms a ground fault will
result. That means that 12.73 microfarads is the maximum allowable amount of
capacitance collectively on all loops leaving the panel.
Figure 2-7: Schematic representation of a typical
ground fault condition caused by capacitance
Note: A ground fault is not caused by the failure to connect earth ground to the system.
Corrective Action:
The most efficient way of troubleshooting a ground fault is to isolate the panel
from the field wiring by removing circuits one at a time and leaving them off
until the problem source has been identified.
1) Disconnect all SLC loops from the panel by removing the detachable
terminal blocks from each LIB and wait for approximately one minute to
see if the ground fault clears.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 9
2) Disconnect the EIA-232 loop from the Serial Interface Board. Wait for one
minute. If the ground fault clears, reconnect this loop to the SIB but discon-
nect the wiring from the external equipment (CRTs, printers, etc.) that are
connected to this loop. If the ground fault clears, the problem lies with the
external equipment. If the ground fault remains, the problem is with the
actual field wiring.
3) Disconnect the EIA-485 loop from the Serial Interface Board. Wait for one
minute. If the ground fault clears, reconnect this wiring to the SIB but
disconnect the wiring at the external equipment (AMG, annunciators, etc.). If
the ground fault clears, the problem is with the external equipment (an RPT-
485W repeater module may be required to isolate the annunciator loop). If
the ground fault is still present, the problem is in the field wiring.
4) Disconnect all field wiring from any AVPS-24s, AA-30s, AA-120s, AMGs,
FFT-7s and any other equipment in the system which share a common
reference with the same battery that the MPS-24A is connected to.
a) If the system has multiple power supplies with ground fault circuitry, use
isolation devices (i.e., RPT-485, ACT-1, etc.) to remove the electrical
connection. When this is not possible, disable all but one ground fault
detection circuit and connect the battery negative terminals of all power
supplies. Isolation of supplies is preferable since multiple power supplies
with a single detection circuit result in increased capacitance to earth and
may give way to poor operation during an actual fault condition.
5) Disconnect all field wiring from terminal block TB3 on the MPS-24A.
6) Power down the panel. Disconnect the ribbon cable that connects the SIB
plug P4 to the DIA plug P4. Disconnect the ribbon cable that runs between
the CPU plug P3 to the DIA plug P3. Apply power to the panel. If the ground
fault condition has cleared, the source of the ground fault is on the Display
Interface Assembly (DIA) and it must be replaced. One simple check on the
DIA is to make sure that a gasket is in place between the LCD display and
the front of the metal assembly. If this gasket is missing, a temporary
solution is to use electrical tape to isolate the display.
7) Disconnect the main power harnesses from the MPS-24A plugs P2 and P4.
8) Disconnect the 2-pin trouble cable from the CPU plug P2 (if connected).
9) Disconnect the battery connection at the batteries while leaving any common
connection intact. If the ground fault still exists, replace the MPS-24A.
Low Chamber Value. Low Chamber Value is an indication that the detection means of an addressable
(Photoelectric, Ionization, and Thermal) detector may be failing. The trouble
condition is produced when the signal from the detector falls below 20% of the
alarm threshold.
Corrective Action:
1) Replace the addressable detector. To do this, remove the old detector. Wait
approximately three minutes and replace with the new detector. Allow several
minutes for the trouble to clear.
2) If the trouble persists, call Notifier Technical Support.
Maintenance Required is an indication that the detection chamber of an address-
able detector (Photoelectric and Ionization only) may be becoming increasingly
dirty. The trouble condition is produced when the level in the chamber climbs
Maintenance Required/
Pre-Alarm Alert.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
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above 80% of the alarm threshold, and remains there for 26 consecutive hours
(60 seconds for pre-alarm). If at anytime the level drops below 80%, the 26 hour
(60 seconds for pre-alarm) timer is reset.
Note: Addressable thermal detectors cannot cause a "Maintenance Required" or "Pre-
Alarm Alert" trouble.
Corrective Action:
1) Clean or replace the addressable detector. To do this, remove the old
detector. Wait approximately three minutes and replace with the new detector.
Allow several minutes for the trouble to clear.
2) If the trouble persists, call Notifier Technical Support.
If a group of consecutively placed Loop Interface Boards, such as (3,4,5 and 6)
or (7,8,9 and 10) are all experiencing catastrophic communications faults, this
could be a clue to the solution. Since the Loop Interface Boards all share a
common Interconnect Chassis Assembly (ICA-4/ICA-4L), this may be the
problem.
Corrective Action:
1) Using proper power removal procedure, move each of the LIBs that are
experiencing the problem to a LIB position that is functioning properly and
reapply power using proper power up procedure.
2) If each of the "problem" LIBs function in their new position, replace the faulty
ICA-4/ICA-4L chassis and return the LIBs to their original positions.
For more information on LIB corrective action, refer to Section Five, Trouble
Code T18.
Drift Compensation Error. AM2020/AFP1010 software is designed to automatically compensate for
detector chamber sensitivity drift due to contamination in SDX-551/751 Photo-
electric and CPX-551/751 Ionization detectors. If the detector sensitivity drifts to
such an extreme that the panel cannot compensate for it, this error will be
generated.
Note: FDX-551 Thermal detectors cannot cause a Drift Compensation Error.
This software-based compensation meets NFPA 72-1993, Chapter 6 "Inspection,
Testing and Maintenance" periodic testing and maintenance requirements
without removing and testing each detector in the system.
Alarm sensitivity in a detector's chamber tends to increase over time. This
increase is caused by chamber contamination. In time, if the clean air level
exceeds the alarm threshold, a false alarm occurs. Drift compensation elimi-
nates this problem by increasing the alarm threshold as needed to maintain a
constant sensitivity. When the detector is too dirty to be compensated, the Drift
Compensation Error will occur.
Drift Compensation may be enabled or disabled in Full or Partial System
Programming.
Catastrophic LIB
Communications Fault
From a Consecutive
Group of LIB's.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 11
Figure 2-8: Detection Chamber Sensitivity and the Alarm
Threshold without Drift Compensation.
Figure 2-9: Detection Chamber Sensitivity and the AlarmThresh
old with Drift Compensation
Drift Compensation is performed on every detector when the system is pow-
ered up and every 120 hours (based on at least four samples). In addition, a
Drift Compensation is performed on a specific detector whenever a non-
communications Invalid Reply clears.
Corrective Action:
If power has not been removed from the system recently and a Drift Compen-
sation error is present, follow the procedure below:
1) Remove the detector in question.
2) Clean the detector by following the directions supplied with it.
3) Leave the detector out for at least three minutes before replacing it.
4) If the trouble does not clear within a few minutes, remove the detector.
5) Wait for approximately three minutes and replace the detector with a new
one (of the same type) that has been set to the proper address.
If power has been removed from the panel, some detectors may show drift
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
12
compensation errors when the power is reapplied. Correct compensation
levels will be restored within five days.
If every device on every SLC loop is in a constant invalid reply condition, this
may be a symptom of a bigger problem common to all the Loop Interface Boards.
The 24 VDC bus originating from the main power supply may be loaded down to
the point that it can no longer support proper operation.
Corrective Action:
1) On the MPS-24A Main Power Supply, with the main power harness or
harnesses plugged in, measure with a voltmeter either Plug P2 or P4,
pin 1 (-) to pin 7 (+).
Figure 2-10:The Upper-Right Corner of the MPS-24A
2) If this voltage reading is well below 24 VDC, power down the system and
disconnect the harnesses from P2 and P4.
3) Wait five minutes. This will allow any PTCs (Positive Temperature Coefficient
thermistors, a self-restoring circuit breaker device) on the main power supply
to self-restore if they have been tripped.
4) Reapply power to the system and measure pin 1 (-) and pin 7 (+) of P2 or P4
again (with the harnesses disconnected). If 24 VDC is not present, the main
power supply must be replaced. If 24 VDC is present, then something else in
the system is loading down this 24 VDC bus. Refer to the current calculation
tables in the AM2020/AFP1010 manual for further information.
Corrective Action:
1) An intermittent invalid reply may be caused by noise. If the SLC loop wiring is
shielded, make sure the shields are terminated properly, refer to the AM2020/
AFP1010 Manual for specific information.
2) Check the times that the invalid replies come in. Do they correspond to the
startup of any electrical motors or other possible sources of noise?
3) If the device that is producing the invalid reply is a Control Module or XPR-8
point, then the source of the invalid reply may be the wiring attached to this
device. Remove the field wiring and see if the invalid reply comes back.
Original MPS-24A
24 VDC (Pin 7)
5 VDC (Pin 8)
Common (Pins 1-4)
Revised MPS-24A
24 VDC (Pin 7)
5 VDC (Pin 8)
Common (Pins 1-4)
Invalid Replies From All
Devices on Every SLC
loop.
Intermittent Invalid
Reply.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 13
If the symptoms at the left exist, it could be an indication of a power supply
problem.
Corrective Action:
1) On the MPS-24A Main Power Supply, with the main power harness that
connects the MPS-24A to the ICA-4L (part number 71030) plugged in,
measure with a voltmeter either Plug P2 or P4, pin 1 (-) to pin 8 (+).
Figure 2-11:The Upper-Right Corner of the MPS-24A
2) The voltage reading should be 5.0 VDC. If this voltage reading is below 4.7 or
above 5.25 VDC, replace the MPS-24A.
3) Record the software EPROM numbers from the CPU, each LIB, SIB, and DIA
and contact the Notifier Technical Service Representative for further instruc-
tion.
This is caused by a short circuit in the wiring of either a Control Module or an
XPC point.
Corrective Action:
1) Check field wiring.
2) Check the style of the field wiring (StyleY or Z).
3) Remove field wiring and place ELR on screw terminals.
4) Check Type I. D.
5) Replace module or XPC card.
This is caused by an open circuit on the NAC of either a Control Module or an
XPC point.
Corrective Action:
1)Check field wiring.
2)Check the style of the field wiring (Style D or B).
3)Remove field wiring and place ELR on screw terminals.
4)Replace module or XPC card.
Original MPS-24A
24 VDC (Pin 7)
5 VDC (Pin 8)
Common (Pins 1-4)
Revised MPS-24A
24 VDC (Pin 7)
5 VDC (Pin 8)
Common (Pins 1-4)
DisplayTrouble LED is
Constantly Illuminated,
Piezo Sounder is Soun
ing Steadily and the AC
Power LED is Flashing
Slowly.
Short Circuit From a
Control Module or XPC
Point.
Open Circuit From a
Control Module or XPC
Point.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
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Constant Invalid Reply. The control panel is trying to poll a device (addressable detector, module, pull
station) at a specific address and is either not receiving any response at all or it
is not receiving a valid response. If two devices are set to the same address, an
invalid reply may not occur immediately.
Note: Under Full System Programming, when a specific NFPA listing (72A, 72B, etc.) is
selected, the AM2020/AFP1010 will automatically program in certain module addresses
(L1M96, L1M97, L1M98, or L1M99). A control module must physically be connected to
the SLC loop at this address, or an invalid reply will occur.
Corrective Action:
The first step in troubleshooting an invalid reply is make sure that the device is
properly programmed into the control panel. Check the following programming
issues:
1)Is the device programmed at the correct address? Check both SLC loop
number and module/detector address.
2)Is the device correctly programmed as a detector or module? Addressable
pull stations and XP Transponder points are considered to be modules.
3)Is the device programmed with the correct type I.D.? If a device is pro
grammed with the wrong type I.D., it may take up to twenty minutes for the
invalid reply to occur.
Note: If the device is an addressable pull station, it can have one of two type I.D.'s. The
BGX-10L is an older pull station which is no longer available, it should be programmed as
a "PULL". The BGX-101L, the most common pull station, must be programmed as an
"MPUL".
4) Once the programming has been verified, check the hardware. Is the device
physically connected to the correct SLC loop?
5)Are the rotary switches on the detector or module set correctly? Address "00"
is not a valid address.
6)Are there two detectors or two modules set to the same address on the same
SLC loop?
7)Does the device physically connected to the SLC loop actually correspond to
what's programmed? Is it a Photoelectric or Ionization detector? Is it a
control or monitor module?
Note: When a control module is programmed as a "CMXC" or an "FORC", the two tabs on
the CMX must be broken.
8) It may be helpful to perform a Walk Test to identify if there is more than one
device at the same address.
The control panel is trying to poll an XP Transponder point at a specific address
and is either not receiving any response at all or it is not receiving a valid
response. Depending on how they are configured, XP Transponders may take
up to 27 addresses (up to 51 for Canadian Dual Stage).
Corrective Action:
The first step in solving an invalid reply problem from an XP Transponder is to
calculate how many addresses the XP Transponder is consuming. Use the work
sheet below to calculate the number of addresses:
If Power Supply Supervision is enabled (XPP switch 1=ON),
it consumes one address (place one in the blank to the right). ___
Invalid Reply From an XP
Transponder Point.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 15
If Relay Mapping is enabled (XPP switch 2=ON), it will
consume two address (place a two in the blank). ___
Depending on how each card is configured, the expander cards
of the Transponder (XPC, XPM, or XPR) can take up to 8 addresses.
If the card is an XPC-8 that is using all eight circuits (Style Y) and
is also configured for Canadian Dual Stage operation, it will
consume sixteen addresses. Calculate the number of
addresses that each card is consuming and enter the number
on the corresponding line.
First expander card ___
Second expander card ___
Third expander card ___
Total number of addresses consumed ___
Take the total number of addresses consumed (above) and add it to the base
address of the Transponder (set via the two rotary switches on the XPP-1)
subtract one, and this will give you the last address that is being taken by the
Transponder. Now that all the Transponder addresses are known, we may begin
troubleshooting the invalid reply.
1) Check the position of switches 7 and 8 to make sure that the Transponder is
not programmed for Local Mode operation (see chart below).
2) If Power Supply Supervision is enabled, confirm that the base address of the
Transponder is programmed with a "MTRB" type I.D.
3) If Relay Mapping is enabled, confirm that the next two addresses are pro
grammed with an "FORC", "CMXC" or other similar type I.D.
4) Confirm that each address point on each of the expander cards is pro
grammed appropriately. If performing Canadian Dual Stage with XPC cards,
confirm that the first address of each circuit is programmed with a "CON"
type I.D. and that each second point is programmed as a "FORC".
5) If the invalid reply persists call Notifier Technical Support.
When activated, this switch performs a hardware reset of the microprocessor on
the CPU. Note: Never press this switch unless instructed to do so by a Notifier
Technical Service Representative. During troubleshooting procedures there are
certain diagnostic reasons for pressing this switch. However, activating this
switch at the improper time may result in loss of AM2020/AFP1010 fire protec-
tion. If this switch is activated without proper instruction, cycle power to the
panel using the prescribed method.
Switch 7 Switch 8 Operating Mode
OFF OFF Communicates with the AM2020/AFP1010. However, the
RESET, ACKNOWLEDGE, and ALL CALL commands are
ignored. Automatically reverts to Local Mode if communications
is lost.
ON OFF No communication with the AM2020/AFP1010. Functions in
Local Mode only.
OFF ON Communicates with the AM2020/AFP1010. Will not function in
Local Mode if communications is lost.
ON ON Communicates with the AM2020/AFP1010. The RESET,
ACKNOWLEDGE, and ALL CALL commands are accepted.
Automatically reverts to Local Mode if communications is lost.
What Does the Switch
(SW1) on the CPU
Board Do?
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
16
The MPS-24A and MPS-24B Main Power Supplies are designed to withstand
IEEE 587 Category A Long Branch Circuits transients. They have been tested to
this standard by Underwriter's Laboratories as part of the UL 864 tests. The
power supplies use Metal Oxide Varistors (MOVs) to achieve this degree of
protection.
The LIB-200 Loop Interface Board is designed to exceed FCC Part 68 Subpart D
Telecommunication Line Transient standards. Underwriter's Laboratories has
tested the LIB-200 to the UL 864 signal line transient level. The LIB-200/200A/
400 uses gas discharge tubes and zener diodes for this protection.
The MPS-TR is designed to supervise any of the MPS series power supplies
when they are remotely mounted.
Yes. Presently, there is only one way to reset the AM2020/AFP1010 from a
keyswitch (either remotely or locally).Take a normally open keyswitch (that when
rotated momentarily closes) and connect it to a control input point on an LDM-32
Lamp Driver Module. This annunciator point must be programmed with a
"ARES" (Annunciator Reset) type ID. Whenever the keyswitch is activated, the
Fire Alarm Control Panel will be reset.
Note: If this keyswitch is mounted remotely from the FACP, Underwriter's Laboratories
requires that the status of all fire alarm zones be annunciated at this remote location.
WhatType of Transient
Protection does the
AM2020/AFP1010 Have?
What is the MPS-TR
Used For?
Can I Reset the AM2020/
AFP1010 From a
Keyswitch?
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 17
SectionThree:
AM2020/AFP1010 Software
There are a number of possible causes for momentary software related prob-
lems. The majority of these problems will clear themselves when power is
removed and then reapplied to the panel.
1) Electromagnetic interference.
2) Radio Frequency interference.
3) A nearby lightning strike or other electrical transient.
If at this point the problem does not clear, refer to the appropriate troubleshoot-
ing section. If the problem still cannot be resolved, contact Notifier Technical
Support.
This situation may be related to a problem with the nonvolatile RAM memory
chips that are located on the CPU, DIB, and SIB-NET. Older chips are prone to
an undesired enabling of the write-protect feature when it is exposed to a small
(0.2 V) negative voltage swing. This type of voltage swing may occur if any
board is plugged in or removed with power applied to the system, or if a power
harness is connected or disconnected with power applied.
All sources of power must be disconnected from the panel before plugging in or
removing a board or power harness.
Note: Beware of hidden voltage sources! One such source could come from
remotely powered annunciators. If an annunciator is powered from a remote
source, this source of power may back-feed into the control panel through the
EIA-485 connection on the Serial Interface Board. To eliminate this possibility
disconnect the EIA-485 terminal block from the SIB.
Corrective Action:
1) Power down the panel and replace either the chips or the entire board.
2) Reprogram and retest the system installation.
This situation may be related to a problem with the nonvolatile RAM memory
chips that are located on the CPU, DIB, and SIB-NET. A damaging voltage surge
may occur if any board is plugged in or removed with power applied to the
system, or if a power harness is connected or disconnected with power applied.
All sources of power must be disconnected from the panel before plugging in or
removing a board or power harness.
Note: Beware of hidden voltage sources! One such source could come from
remotely powered annunciators. If an annunciator is powered from a remote
source, this source of power may back-feed into the control panel through the
EIA-485 connection on the Serial Interface Board. To eliminate this possibility
disconnect the EIA-485 terminal block from the SIB.
Possible Causes for
Software Related
Problems.
The SystemWill Not
Accept Any New
Programming
Information.
The System Loses
All Programmed
Information.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
18
Figure 3-3: Nonvolatile RAM Chips
Corrective Action:
1) Follow proper precautions when applying or removing power from the Fire
Alarm Control Panel. If proper procedures have been followed and loss of
memory is still a problem, call Notifier Technical Services.
When new points are programmed into the system they will cause a trouble
condition if the devices are not physically installed. When each trouble is
received, the piezo sounder will sound and the user will get kicked out of
programming. This situation can become quite annoying, but is easily resolved.
Corrective Action:
1) In Partial System Programming, select to silence the piezo sounder during
programming.
2) Go to Full Point Programming, and program the first device to be added to the
system.
3) Shortly after programming this device, a trouble condition (Invalid Reply) will
be generated. This trouble condition will result in the user getting kicked out of
Full Point Programming.
4) Do not acknowledge this trouble.
5) Instead, immediately reenter Full Point Programming and begin to program
the next point. As soon as the user reenters Full Point Programming, the
piezo sounder will silence and will not resound for subsequent trouble
conditions while the user is in program mode.
6) Upon completion of all point programming, return to Partial System Program
ming and re-enable the piezo sounder during programming.
When the event reminder is enabled in Full or Partial System Programming, the
piezo sounder will beep approximately every seven seconds as a reminder that
acknowledged events remain in the system and have not been restored yet. If
this condition is not desirable, it may be easily disabled.
Corrective Action:
1) Enter Full or Partial System Programming and disable the event reminder.
2) With the event reminder disabled, once the piezo sounder is silenced for an
event condition, it will remain silenced until a new event occurs.
The Operator Keeps
Getting Kicked Out of
Programming Every
Time a New Point is
Added.
The Piezo Sounder
Continues to Beep, Even
After All Events Have
Been Acknowledged.
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97 19
The main difference between a forward-activated zone and a reverse-activated
zone is as follows:
A forward-activated zone has a Control-By-Event list of devices or higher
numbered zones that it will activate when it (the zone) goes into alarm. It enters
the alarm condition when an initiating device or lower numbered forward-
activated zone (FZON) that is mapped to it goes into alarm.
A reverse-activated zone has a Control-By-Event equation that must be
evaluated. If this equation becomes true the reverse-activated zone (RZON) will
go into alarm. The equation consists of operands such as devices or zones and
operators such as the OR, AND, NOT, XZONE, DEL, TIM and SDEL functions.
In Full System Programming a boundary must be set up between forward-
activated zones and reverse-activated zones. Every zone above this boundary
will be an RZON and every zone below this boundary will be an FZON. The
AM2020/AFP1010 has 240 software zones. For typical installations Notifier
recommends setting the boundary at Zone 200. Where Zone 200 would be the
highest number forward-activated zone and Zone 201 would be the lowest
number reverse-activated zone. Depending on your specific application this
boundary may need to be moved higher or lower.
Forward Activated Zones
A forward activated zone (FZON) is a zone that may be activated by any initiating
device (detector, monitor module, XPM point, or pull station) or by a lower
number FZON. In addition, once activated an FZON will execute it's Control-By-
Event (CBE) list which can only consist of a number of things to activate.
Example: Let's assume that Zone 10 and Zone 11 are both forward activated zones. Zone
10 is activated by an addressable pull station on the first floor. Zone 10's CBE list could
consist of the following:
(Z11 Z220 L1M80 L3M62 L10M33)
The above CBE is nothing more than a list of things to do. When Zone 10 goes into alarm
it will activate: Zone 11 (a higher number FZON), Zone 220 (an RZON), and L1M80,
L3M62, and L10M33 (these devices must be output type devices such as Control Modules,
XPC, or XPR points). Remember, by definition a FZON's Control-By-Event list is only a list
of things to do. It cannot contain any equations such as AND, OR, NOT, XZONE etc..
As in the example above, Zone 10 may be mapped to activate Zone 11. But,
Zone 11 cannot be programmed to activate Zone 10. Since Zone 10 is of lower
numerical value than Zone 11, Zone 11 cannot go back and activate it.
Reverse Activated Zones
A reverse activated zone (RZON) is a zone that may be activated by any initiating
device, forward activated zone, and also by it's own CBE equation (including
lower number RZON). Unlike forward activated zones, RZONs have a Control-
By-Event equation. The AM2020/AFP1010 continually processes each RZONs'
programmed equation. If the equation becomes true, the RZON will activate. For
examples of reverse-activated zone Control-By-Event equations, see specific
functions such as the OR, AND, NOT, XZONE, DEL, TIM or SDEL functions.
What is the Difference
Between a Forward-
Activated Zone and a
Reverse-Activated Zone?
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AM2020/AFP1010 Troubleshooting Guide 50432 Revision A 8/13/97
20
The "OR" function operates identically to a logic OR statement. It may be used
in the Control-By-Event equation of an output type device (CMX, XPC, or XPR
modules) or of a reverse-activated zone.
Equation Format: OR(Za Zb)
Example 1: Assume that Zone 208 is a reverse activated zone with the following Control-
By-Event equation:
OR(Z100 Z201)
This means that if either Zone 100 OR Zone 201 activate then Zone 208 will activate. The
logic gate equivalent of this equation would look like Figure 3-4.
If it easier to visualize, this equation can also be represented in electrical terms as two
normally open switches in parallel. So that if either one of the switches (Zone 100 or Zone
201) is activated, then the lamp (Zone 208) will turn on.
Note: As shown in the above examples, a reverse activated zone (Zone 208) may
reference another RZON (Zone 201) in it's equations provided that the zone that it is
referencing is numerically lower.
The "OR" function may reference any number of inputs (provided that the 14 byte
equation size limit is not exceeded). The "OR" function may also directly
reference addressable detectors and modules as shown below.
Example 2: Assume that Zone 211 is a reverse activated zone with the following Control-
By-Event equation:
OR(L1M1 L1D1 Z12 Z38)
This means that if either L1M1 (a pull station, monitor module, or XPM point) OR L1D1 (an
addressable detector) OR Zone 12, OR Zone 38 go into alarm then Zone 211 goes into
alarm. The electrical equivalent of this equation would be four normally open switches in
parallel.
These are the zones or devices to be
"ORED" together.
Figure 3-4: Logic gate equivalent of a two input OR equation.
Figure 3-5: Electrical equivalent of a two input OR equation.
How Does the "OR"
FunctionWork?
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