65-2640XL-04 M2A Transmitter Operator’s Manual
Chapter 7: Maintenance
•
37
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended action for
problems you may encounter with the M2A.
NOTE:
This troubleshooting guide describes M2A problems only. If the M2A is connected to a
controller, see the controller operator’s manual for problems you may encounter with
the controller.
Table 7: Troubleshooting the Combustible Gas Detector
Condition
Symptom(s)
Probable Causes
Recommended Action
No Power
The display back
-
light is off and the
display screen is
blank.
• The power wiring is
disconnected or
misconnected.
• The display cable is
disconnected or
misconnected.
1. Verify that the wiring to the
power source or controller is
correct and secure.
2. Verify that the ribbon cable
connecting the terminal PCB to
the control PCB is securely
installed. This ribbon cable plugs
into a connector on the top edge
of the control PCB and on the
bottom of the terminal PCB.
3. If the power difficulties continue,
contact RKI for further
instruction.
Frequent or
Suspect
Alarms
The M2A alerts you
to frequent or sus
-
pect alarms while the
fresh air readings
remain on zero.
• 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 M2A Transmitter” on
page 17.
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.
