RKI Instruments M2A - Manual (Page 44)

39 M2A Transmitter Operator’s Manual
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 9:Troubleshooting the Combustible Gas Detector
Condition Symptom(s) Probable Causes Recommended Action
No Power The display backlight 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 suspect alarms
while the fresh air
readings remain on zero
(20.9 for oxygen). • 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 18.
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 M2A
Transmitter” on page 18.
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.