Troubleshooting, Maintenance – Det-Tronics PM-5MPX Dual Spectrum IR User Manual

Page 8

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4.1

3. Interconnection Wiring. Correct interconnection

wiring should be checked by disconnecting any wire

from the multi-conductor cable were it is connected

to the power or alarm circuit. The result, in an

approved wiring scheme, should be a trouble signal

indication at the control panel.

4. Restore Fire protection System. Restore the

system to an operational condition after all tests have

been completed.

OpTIONAl TEST mETHOD
With the detector powered up, the following tests can be

done. False alarm immunity can be checked using stimuli

and distances shown in the table in Appendix A. Fire

response can be checked by exposing the detector

under test to a live fire source. (See Appendix A.) Follow

all required precautions when testing in this manner.

TROUBLESHOOTING

See Table 3.

MAINTENANCE

ROUTINE vISUAl INSpECTION
A properly installed PM-5MPX detector system is highly

resistant to blinding by contamination build-up on the

detector front face window. However, a thick enough

build-up will begin to reduce the performance of the

detector. This can be prevented by periodically inspecting

installed detectors visually for contamination build-up on

the detector front face. If such a build-up is observed, it

should be removed by cleaning the detector front face

window with a soft cloth or lens tissue. The minimum

inspection period should be compatible with appropriate

regulating agency requirements.

WARNING

To prevent the risk of electrostatic discharge, the
surface of the detector should only be cleaned with
a damp cloth.

pERIODIC SySTEm TEST
The authority having jurisdiction and internal facility

requirements generally call for routine testing of safety

systems at defined intervals, which, at a minimum, should

conform to the requirements of NFPA 72. These tests

should include visual inspections and the steps listed in

the System Test section above.

table 3—troubleshooting guide

Symptom

probable Cause

Corrective Action

Trouble signal at fire alarm control panel.

Incorrect wiring

Check circuit installation.

Low or no voltage to detector.

Check voltage of Red or Orange wire with

respect to the Black or Brown wire. Should be

9 to 30 Vdc.

Detector malfunction.

Replace detector

Detector does not alarm during FIRE
RESPONSE test with PSS-MP.

Incorrect wiring.

Check circuit installation.

PSS-MP temperature different from detector.

Allow detector and PSS-MP temperatures to

stabilize. Turn on PSS-MP at least 15 seconds

prior to test.

Low batteries in PSS-MP.

Replace batteries and retest.

Detector malfunction.

Replace detector.

Red LED out.

Incorrect wiring or incorrect power to the

detector.

Check circuit installation.

Detector malfunction.

Replace detector.

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