Section 12: Testing And Troubleshooting; Troubleshooting; 1: Common Problems; Periodic Testing And Maintenance - Honeywell 6820 Manual

12.1 Troubleshooting

This section of the manual offers suggestions for troubleshooting hardware problems. Please read this section if you encounter a problem
when installing the control panel. If these suggestions do not solve your problem or if you encounter a problem that is not listed here, contact
Silent Knight Technical Support at 800.446.6444 for assistance.
12.1.1 Common Problems
Problem
Trouble message "DBL ADDR"
(Double Address) displays on
LCD.
Auxiliary power or notification
circuits have incorrect polarity.
SLC devices are not being
recognized (trouble message
"Missing" displays).
SLC devices are not being
recognized (trouble message
"Missing" displays on the
annunciator).
The panel indicates a ground fault
trouble condition (trouble
message "GROUND FAULT"
displays).
5496, 6815, or 5815XL module
that has been physically
connected to the panel but is not
being recognized.

12.2 Periodic Testing and Maintenance

To ensure proper and reliable operation, it is recommended that system inspection and testing be scheduled monthly or as required by
national and/or local fire codes. Testing should be done by a qualified service representative if a malfunction is encountered.
Before Testing
1. Notify the fire department and/or central alarm receiving station.
2. Notify facility personnel of a test so that alarm sounding devices are ignored during the test period.
3. When necessary, activation of Notification Appliances can be prevented by the DISABLE function.
Testing
1. Activate a input via an alarm initiating device and check that the correct outputs activate (Notification Appliances sound/flash, relays
activate, alarm indicator lights). Reset system. Repeat for each alarm initiating device.
2. Momentarily open the following circuits one at a time and check for a trouble sign:
6820/EVS Manual — P/N LS10144-001SK-E:E 4/6/2022

Section 12: Testing and Troubleshooting

An address has been assigned to more than one detector. Correct the address following the procedure described
for SK and SD devices in the SLC Wiring Manual.
Correct polarity. For notification and auxiliary power circuits: When in alarm or powered, terminals labeled "X" are
positive, terminals labeled "O" are negative.
Check hardware connections. If devices are physically connected, make sure wiring is correct. Refer to the SLC
Wiring Manual. For 6815 and 5815XL devices, make sure the device connects to the 6815 and 5815XL via the SLC
OUT terminals. There can be only one SLC loop on the main panel and on each 6815 and 5815XL module. Do not
connect devices to terminals labeled SLC IN.
Make sure SLC devices have been addressed properly. For information on device addressing, refer to the SLC
Wiring Manual.
For contact monitor modules, which are addressed using DIP switches, the DIP switch must be set to the correct
address before power is applied to the SLC loop. If this procedure is not followed, the device will have an incorrect
address.
Make sure correct polarity has been observed for SLC device wiring. For information on wiring, refer to the SLC
Wiring Manual.
Check that SLC loop impedance is within the required range.
To measure impedance, use the following procedure:
1. Disconnect both wires from the terminal block at the panel (SLC devices can remain connected).
2. Measure the impedance from positive to negative and from negative to positive. Both measurements should
be greater than 500 k ohms. If the installation uses T-taps, test each T-tap individually.
3. Temporarily connect the positive wire to the negative wire of the SLC loop at the point farthest from the panel
(SLC devices can remain connected).
4. Measure the impedance from positive to negative and from negative to positive wires that were disconnected
from the panel in step 1. Both measurements must be less than 50 ohms.
An earth ground fault occurs when the panel senses an unexpected flow of current from one or more of its terminals
to the earth connection (Terminal 2).
Isolate the wiring that is causing the fault by removing wiring connections one at a time until the earth fault is no
longer present. Pause at least five seconds after removing a wire before removing the next one.
The panel will also go into ground fault if a computer is connected to the panel via a serial cable attached to the
panel's 9-pin connector or a USB cable. This is a correct method for on-site communication between a panel and a
computer. Ignore the ground fault message in this case. The trouble will clear automatically when you disconnect
the computer from the cable.
Check the status of the module's green LED. If it flashes in the pattern half second on/ half second off, it is likely that
the device has not been added to the system through programming. JumpStart will add any modules connected to
the panel. If you have already run JumpStart, modules can be added manually. (Refer to Section 8.2.2).
Check that the correct ID for the module has been set through the DIP switches. Assign ID#1 to the first module and
ID#2 to the second.
If the wiring between the device and the panel is correct, measure the voltage from the Terminal (+) to Terminal (-).
Voltage should be in the range 27.2-27.4V when AC power is present.
If the green LED is not flashing, the likely cause is incorrect wiring from between the device and the panel.
Table 12.1 Troubleshooting
Possible Cause / Suggested Actions
149