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65-2643RK-05-04 M2A Transmitter Operator’s Manual
Frequent or
Suspect
Alarms
The M2A alerts you to
frequent or suspect
alarms while the fresh
air readings remain on
20.9%.
• The M2A is
experiencing false
readings due to RFI
or EMI.
• The detector wiring is
disconnected,
misconnected, or
intermittent.
1. Verify that the M2A wiring is
properly shielded. See “Wiring the
2. Verify that the detector wiring is
correct and secure.
3. Increase the alarm on delay setting in
Configuration Mode.
4. If the frequent or suspect alarm
difficulties continue, contact RKI for
further instruction.
Flickering
Display
The display reading
flickers often.
• The M2A is
experiencing false
readings due to RFI
or EMI.
• The noise filter
setting is too low.
• The zero suppression
setting is too low.
• The display screen is
malfunctioning.
1. Verify that the M2A wiring is
properly shielded. See “Wiring the
2. Verify that the detector wiring is
correct and secure.
3. Increase the filter setting in
Configuration Mode.
4. Increase the zero suppression setting
in Configuration Mode.
5. If the display difficulties continue,
contact RKI for further instruction.
Fail
Condition
• M2A indicates a fail
condition.
• Controller indicates
a fail condition.
• The detector wiring to
the terminal PCB is
disconnected or
misconnected.
• The wiring from the
M2A to the controller
is disconnected or
misconnected.
• The detector fresh air
signal is low enough
to cause a fail
condition.
• The detector is
malfunctioning.
• The terminal or
display PCB is
malfunctioning.
1. Verify that the detector wiring is
correct and secure.
2. Verify that the wiring between the
M2A and the controller is correct and
secure.
3. Calibrate the M2A.
4. If the fail condition continues,
replace the detector.
5. If the fail condition continues,
contact RKI for further instruction.
Table 7: Troubleshooting the Oxygen Detector (Continued)
Condition
Symptom(s)
Probable Causes
Recommended Action
