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Pag. 15
4.2 Operating errors
Table 4) Posible kind of errors that can occur during operations with the calibration keypad
Tipologia di errore
Possibile causa
Azione conseguente
Calibration error
(ErrC)
Sensor’s reading out of ran-
ge
The zero calibration is not
performed
Zero calibration warning
(Ung0 – warning invalid zero)
The sensor has a non-zero
reading
The zero calibration is per-
formed but with a warning
notice
Span calibration warning
(Ung0 – warning invalid sensiti-
vity)
The user has set a span va-
lue out of range
The span calibration is per-
formed but with a warning
notice
Threshold setting error (ErrT)
The user has set a threshold
out of range
The threshold is not me-
morised
Hysteresis setting error (ErrT)
The user has set a hystere-
sis value out of range
The hysteresis is not me-
morised
Address error (ErrA)
The user has set a value out
of range (range: 1- 247)
The address is not memo-
rised
Baudrate error (ErrB)
The user has set a non-ad-
missible value (admissible
values: 9600, 19200, 38400,
115200)
The baudrate value is not
memorised
5. Troubleshoot of detector’s errors
Table 5) Troubleshooting
Problem
Possible causes
Remedies
UEOL message
End of sensor lifetime
Sensor substitution
“ErrH” message
Mismatch between the head and
the gas detector
Please perform pairing procedure
Untn message
Due date sensor maintenance
Check sensor functionality (with a
gas test, for example)
EE2P message
The internal memory E2Prom is
not working
Please perform the reset procedure
by the 459 tech password
EFLS message
The internal memory Flash is not
working
Please perform the reset procedure
by the 459 tech password
ErAN message
The internal memory Ram is not
working
Please perform the reset procedure
by the 459 tech password
EALM message
The power supply of the detector
is outside of range (from 12Vdc to
24Vdc)
Please check the power supply on
the + and – terminals of the detector
