Universal Security Instruments MDS300 Troubleshooting Guide

OPERATIONAL SUMMARY

MODELS MDS300 & MDS300L QUICK REFERENCE GUIDE

CONDITION OF ALARM AUDIBLE & VISUAL SIGNALS BEFORE SOLUTION / RECOMMENDATION

HORN RED LED

Silent

3 Beeps,

2 second pause,

Repeat

3 Beeps,

2 second pause,

Repeat

3 Beeps,

2 second pause,

Repeat

Silent

(alarmed

previously)

Silent

1 Chirp

approx every

40 seconds

1 Beep

approx every

60 seconds

Blinks On

once approx every

40-45 seconds

Blinks On

approx every

2 seconds
Blinks On

approx every

2 seconds

Blinks On

approx every

2 seconds
Blinks On

once approx every

40-45 seconds

(normal operation

mode) or Blinks On

once approx every

10 seconds

(silence mode)
Blinks On once

approx every

40-45 seconds

(normal operation

mode) or Blinks On

once approx every

10 seconds

(silence mode)

Blinks On once

approx every

40-45 seconds

Blinks On once

approx every

40-45 seconds

DC Power is present.

Originating smoke alarm - If hazard is identified, please take
all precautions if an alarm sounds by calling an Emergency
Service and getting out of the home.

Nuisance Alarm - If there is no hazard present, verify the
alarm is mounted in the correct location (see User's Manual,
"AVOID THESE LOCATIONS" section). Reset alarm as
instructed below.

Silence Feature is activated by pressing and releasing the
Test/Silence button on the initiating alarm while in alarm
condition. Silence mode will last for 8-12 minutes.

QUICK FIND® ALARM ORIGINATION: The QUICK FIND
feature will allow you to immediately locate the originating
alarm (once the alarm has stopped sounding). To initiate
QUICK FIND®, press the T est/Silence button on each alarm.
After releasing the button, the originating alarm will continue
to sound for 60 seconds. In a non-interconnected installation,
it is necessary to test each alarm to determine the originating
alarm. Reset the originating alarm.

To Reset the Alarm - Hold the Test/Silence button for 10
seconds. This will clear alarm origination and clear Silence
mode. Reset after each smoke alarm event.

Low Battery - Check to make sure the battery activation pull­tab has been completely removed, battery polarity is correct
and the battery terminals are making contact with the smoke
alarm contacts in the battery drawer. If chirp continues,
replace the 9V battery (see User's Manual for recommended
battery types).

End-of-Service Life alarm. The alarm should be replaced
immediately.

SOLUTION / RECOMMENDATION

®

THIS PRODUCT IS LISTED TO UL STANDARD FOR SAFETY,

UL217 BY UNDERWRITERS LABORATORIES, INC.

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