RKI Instruments M2A - Manual (Page 45)

M2A Transmitter Operator’s Manual 40
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.
Slow or No
Response/
Difficult or
Unable to
Calibrate • M2A responds slowly
or does not respond to
response test.
• Unable to successfully
set the fresh air or
span (zero for oxygen)
reading during
calibration.
• M2A requires
frequent calibration.
Note: See “Calibration
Frequency” on page 41
for calibration frequency
guidelines.
• The calibration cylinder
is low, out-dated, or
defective.
• The detector is
malfunctioning.
• The terminal PCB is
malfunctioning.
1. Verify that the calibration cylinder
contains an adequate supply of a fresh test
sample.
2. If the calibration/response difficulties
continue, replace the detector.
3. If the calibration/response difficulties
continue, contact RKI for further
instruction.
Table 9:Troubleshooting the Combustible Gas Detector (Continued)
Condition Symptom(s) Probable Causes Recommended Action