Macurco CX-6 User Instructions page 30

Macurco CX-xx Manual (Rev-1.0) Eng
CO Trouble Code
t801
t802
t804
t810
t820
t840
t880
t900
tA00
tc00
When trouble codes exist for both sensors at the same time, the two trouble codes will be displayed alternately.
If there are multiple error codes for the same sensor existing at the same time, the displayed code will be the sum of
error codes. E.g. The display will show "t003" if t001 and t002 exist at same time, "t821" if t820 and t801 exist at the
same time.
If the sum for a digit (ones, tens or hundreds) is greater than 9, it will display the corresponding hexadecimal
representation of the sum. The following table shows the hexadecimal representation for numbers from 10 to 15.
For example, if t040 and t080 exists at the same time then it displays "t0c0" because 8 + 4 equals 12 and the
hexadecimal representation of 12 is "c".
Note that in tXXX first digit after 't' is 8 for CO sensor and 0 for NO2 sensor. Trouble codes t900, tA00 and tc00 are
result of adding 1, 2 and 4 to first digit 8 used to represent CO sensor. Hence when adding up the trouble code for
the CO sensor, 8 is not added twice. E.g. if t820 and t810 exist at same time displayed error code will be t830.
Similarly, if tA00 and tc00 exist at the same time, then the trouble code displayed is tE00.
NOTE: If the error mode repeats frequently, check for continuous power and proper voltage. If power is not the
problem and a unit has repeating error conditions, it may need to be returned to Macurco for service, per these
User Instructions. If the error mode indicates "Sensor expired", see section 6.1 Sensor Life Reset.
REV – 1.0
NO Trouble Code
2
t001
t002
t004
t010
t020
t040
t080
t100
t200
t400
Table 5-1
Decimal Number Hexadecimal Representation
10 A
11 b
12 c
13 d
14 E
15 F
Table 5-2
[34-2900-0512-0 ]
Description
Sensor Missing
Temperature Compensation Failed
Bad EEPROM Checksum
Bad EEPROM
Bad Calibration
Never Factory Calibrated
Read ADC Failed
Sensor Under Range
Sensor Expired
Calibration Overdue
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