Troubleshooting
PCA
TABLE 7-1. TROUBLESHOOTING GUIDE (Cont.)
Fault
Probable Cause & Remedy
NX-SENSOR ERROR
code
appears in the Sensor Status
Screen.
CO-SENSOR ERROR
code
appears in the Sensor Status
Screen.
DRAFT-SENSOR ERROR
code
appears in the Sensor Status
Screen.
T-STACK OR T-AIR SENSOR
ERROR
code appears in the
Sensor Status Screen.
BAD CALIBRATION ENTRY
message appears during calibra-
tion.
7-4
a.
Calibration was attempted while
sampling combustion gases.
b.
Nitric Oxide sensor is expired.
Replace sensor per Section 6.7.
c.
Bias battery on the Nitric Oxide
circuit board is dead. Replace bat-
tery per Section 6.7.2.
a.
Calibration was attempted while
sampling combustion gases.
b.
Carbon Monoxide sensor is
e
x
-
pired.
Replace sensor per Sec-
tion 6.8.
a. Sensor was exposed to pressure
outside of its detectable range.
b.
Sensor defective. Return analyzer
to Bacharach for repair.
a.
Calibration was attempted while
sampling combustion gases.
b.
Thermocouple not connected.
Connect thermocouple to ana-
lyzer per Section 3.3.
c
.
Thermocouple defective. Re-
place probe assembly.
d.
Instrument was exposed to tem-
peratures outside it’s allowable
operating range.
Apply a calibration value that is
within the range of the sensor as
listed in the calibration procedure.
Instruction 0024-9219
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