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Macurco MRS-485 Modbus RS-485 Adapter
mode. In this error mode, the Fan and Alarm relays will be activated, the 4-20 mA output will go to 24 mA, the
unit will display the error code and the buzzer will chirp intermittently.
8.1
Operation Test
Normally this will be the only test required for the 6-Series detectors and is the recommended way to test the
unit or units after installation. Check that the detector operating LED light is illuminated Green continuously. If
not, do not proceed with the tests. If the unit is in error mode, contact your local representative or Macurco
technical service representative for information on resolving the problem.
1.
Remove the single screw in the middle of the front cover of the 6-Series detector.
2.
Remove the front cover.
3.
Observe the LED light on the front of the 6-Series detectors.
4.
If the light is solid green, proceed to step 6.
5.
If the light is off or flashing Green, refer to the Section 5.3 Normal Operation above.
6.
Locate the switch labeled ENTER/TEST on the left side of the printed circuit board. Press the Test switch
once.
7.
The 6-Series detector will step through a cycle test:
a.
The display progresses through the bUZ (buzzer Test) Art (alarm relay test), Frt (fan relay test)
then 42t (4-20 mA output test).
b.
Make sure that the settings are "on" and not disabled "diS".
c.
During the first 10 seconds of the test cycle, the display will show "bUZ" and set off the audible
buzzer.
d.
The alarm relay will be closed, so any devices connected to that relay will be tested.
e.
The Fan relay will be activated for the next 1 minute of the test, so if the fan circuits are wired in
the typical manner, the fan should run.
f.
The 4-20mA output will then ramp up from 4 to 16 mA over the next 130 seconds of the test, so if
the circuit is wired in the normal manner, the control panel or building automation system should
respond.
g.
At the end of the test cycle, the light will turn green and be on steady (Normal Operation), the fan
and alarm relays will be in standby mode and the 4-20 mA output will return to 4 mA in clean air
(Exception for Oxygen with OX-6).
REV – 1.0
[34-2900-0019-8]
20 |
P a g e
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