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PCA
Instruction 24-9351
NX-SENSOR ERROR code ap-
pears in the Sensor Status Screen.
CO-SENSOR ERROR code ap-
pears in the Sensor Status Screen.
DRAFT-SENSOR ERROR code ap-
pears in the Sensor Status Screen.
TA-SENSOR OR TL-SENSOR
ERROR code appears in the Sen-
sor Status Screen.
“****” appears in one or more value
fields.
7-4
TABLE 7-1. TROUBLESHOOTING GUIDE (Cont.)
Fault Probable Cause & Remedy
Troubleshooting
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 ex-
pired. Replace sensor per Sec-
tion 6.8.
a. Sensor is exposed to pressure out-
side of its detectable range.
b. Sensor defective. Return analyzer
to Bacharach for repair.
a. Calibration was attempted while
sampling combustion gases.
b. Thermocouple defective. Re-
place probe assembly.
c. Thermocouple not connected.
Connect thermocouple to ana-
lyzer per Section 3.3.
d. Instrument exposed to temp-
erature outside it’s allowable
operating temperature.
The field’s associated sensor is not
installed.