Macurco CX-6 - Trouble Codes

Macurco CX-xx Manual (Rev-1.0) Eng
REV – 1.0 [34-2900-0512-0 ] 30 | Page
CO Trouble Code
NO
2
Trouble Code
Description
t801
t001
Sensor Missing
t802
t002
Temperature Compensation Failed
t804
t004
Bad EEPROM Checksum
t810
t010
Bad EEPROM
t820
t020
Bad Calibration
t840
t040
Never Factory Calibrated
t880
t080
Read ADC Failed
t900
t100
Sensor Under Range
tA00
t200
Sensor Expired
tc00
t400
Calibration Overdue
Table 5-1
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.
Decimal Number
Hexadecimal Representation
10
A
11
b
12
c
13
d
14
E
15
F
Table 5-2
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.