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7 Error messages / malfunctions
The exhaust-gas analyzer is equipped with extensive self-test functions. Malfunctions which can be detected automatically are indicated
by means of the error messages described below (Sections 7.1 to 7.3).
Error messages are displayed in two forms:
a) One group (Sections 7.1 and 7.2) takes the form of binary numbers (1, 2, 4, 8, etc.). In this way, several errors may be displayed
at the same time. For example: Err 7 = Err 1 and Err 2 and Err 4.
b) In the other group (Section 7.3), the error is indicated directly by means of symbolic error text. These messages appear in the
measured-value window in question.
A few other possible malfunctions are described, together with instructions for dealing with them, in Section 7.4.
7.1 Error messages in the CO display field
Error messages Possible cause Trouble-shooting
Amplifier output signal of HC measuring See Section 8.7 "Faulty channel amplifier"
outside tolerance
Amplifier output signal of CO measuring See Section 8.7 "Faulty channel amplifier"
channel outside tolerance
Amplifier output signal of CO
2
measuring See Section 8.7 "Faulty channel amplifier"
channel outside tolerance
Overflow in O
2
measuring channel. See Section 8.12 "Faulty O2 measuring
Measured value at O
2
amplifier output > 5 V. channel
O
2
measuring sensor not connected or
faulty or incorrect processing of measured
values.
Temperature signal of tmeperature See Section 8.6 "Faulty temperature
compensation outside tolerance compensation"
Supply voltage outside tolerance See Section 8.13
"Supply-voltage alarm"
CMOS-RAM check failed See Section 8.4 "RAM check error"
Err 1
Err 2
Err 4
Err 16
Err 32
Err 64
Err 128
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