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44 Pelco Manual C1487M-D (7/99)
d. Turn on power. If the unit still does not operate, turn off power and replace the dome
drive with a unit that is good, if you have a spare. Check the switch settings on the
substitute dome drive before installing it. If you do not have a spare, return the dome
drive to the factory. Also return the back box electronic assembly. Refer to the
Back
Box Electronic Assembly Removal
section.
e. If you substituted a dome drive, turn on power. If the unit operates, the original dome
drive is bad. Return it to the factory. If the unit still does not operate, then the
interconnect board is bad. Return the back box electronic assembly to the factory;
refer to the
Back Box Electronic Assembly Removal
section.
Symptom: Fan does not operate.
1. Turn off power.
2. Remove the lower dome:
In-Ceiling Models - Insert the flat blade of a screwdriver into one of the slots on the
trim ring and twist the screwdriver to pop loose the trim ring and lower dome.
Pendant Models - Remove the two screws that hold the trim ring to the back box.
Insert the flat blade of a screwdriver into the slots on the trim ring and twist the
screwdriver to free the lower dome from the back box.
3. Remove the dome drive: Push in on the green drive eject tab on the side of the dome
drive and gently rock the dome drive to release the latch. When the green latch
releases, pull the dome down.
4. Make sure the connector for the fan is fully seated.
5. Replace the dome drive. Turn on power. If the fan does not operate, return the back
box electronic assembly and dome drive to the factory for repair. Refer to the
Back
Box Electronic Assembly Removal
section.
Symptom: Alarms not cycling when more than one alarm is active
Reset all your alarm priorities to all LOW or all HIGH (refer to the
Alarms
section for an
explanation of alarm high/low priorities). To reset the alarm priorities, do the following:
1. Go to the
Main Menu Access
section and follow the instructions for accessing the
programming main menu.
2. Go to the
Alarm Priority
section and follow the instructions for setting the alarm priority.
Symptom: Alarms not going to preset
1. Check that the preset is defined.
2. Check that no higher priority alarm is activated.
3. Check that a pattern is not set for the affected alarm(s). If a pattern is set, the alarm
will run a pattern, not go to a preset. If a pattern (or patterns) is set, reset the
pattern(s) to NO PATTERN.
To reset a pattern, do the following:
1. Go to the
Main Menu Access
section and follow the instructions for accessing the
programming main menu.
2. Go to the
Alarm Pattern
section and follow the instructions for setting the alarm
pattern.
Symptom: Alarms not starting a pattern
Ensure that the pattern selected is valid. Any time you expect a pattern to execute, make
sure the pattern is recorded correctly and is valid.
Symptom: Motion problems
When troubleshooting motion problems on a system where alarms are connected, you can
eliminate alarms as a cause of the problem by disconnecting the alarm block in the back box.