RKI Instruments M2 Series - Manual (Page 43)

M2 Transmitter Operator’s Manual 38
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended
action for problems you may encounter with the M2.
NOTE: This troubleshooting guide describes M2 problems only. If the M2 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 M2 alerts you to
frequent or suspect
alarms while the
fresh air readings
remain on zero (20.9
for oxygen). • The M2 is
experiencing false
readings due to RFI
or EMI.
• The detector wiring
is disconnected,
misconnected, or
intermittent.
1. Verify that the M2 wiring is
properly shielded. See “Wiring
the M2 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 M2 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 M2 wiring is
properly shielded. See “Wiring
the M2 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.