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7.7 System Checkout
The following are the recommended steps before and during the powering up of the MR-3318.
7.7.1 Before Turning The Power ON
1. To prevent sparking, DO NOT connect the batteries first. Connecting the batteries is only
to be done after the system has been powered from the main AC Supply.
2. Check all field (external) wiring for opens, shorts, and ground.
3. Check that all interconnection cables are secure, and that all connectors are plugged-in
properly.
4. Check all Jumpers and Switches for proper setting.
5. Check the AC power wiring for proper connection.
6. Check that the chassis is connected to EARTH GROUND (cold water pipe).
7. Close the front cover plate before powering the system from main AC supply.
7.7.2 Power-up Procedure
1. After completing 7.7.1 Before Turning The Power ON procedures, power-up the panel.
The green
AC-ON
LED should illuminate.
2. Since the batteries are not connected, the
Battery Trouble
LED should illuminate, the
Common Trouble
LED should flash and the Trouble Relay (on the main board) will be
active.
3. Connect the batteries while observing correct polarity; the red wire is positive (+) and
black wire is negative (-).
4. All indicators should extinguish except for normal power
AC-ON
green LED.
7.8 Troubleshooting
The following are common methods to solving Circuit Ground Fault, Battery and Common
troubles.
7.8.1 Circuit Trouble
Normally when a circuit trouble occurs, the Common Trouble indicator will be illuminated and
the common trouble relay will be active. Additionally, the corresponding LED on the main
board will be illuminated. This can be viewed by opening the panel and looking the top of the
board. To correct the fault, check for open wiring on that particular circuit loop.
7.8.2 Ground Fault
This panel has a common ground fault detector. To correct the fault, check for any external
wiring touching the chassis or other Earth Ground connection.
7.8.3 Battery Trouble
Check for the presence of batteries and their conditions. Low voltage (below 20.4V) will cause
a battery trouble. If battery trouble condition persists, replace batteries as soon as possible.
7.8.4 Common Trouble
If only a common trouble is indicated on the main panel and none of those above confirming
trouble indicators are on, then check the following for possible fault
•
any missing interconnection wiring
•
improperly secured cabling
