8
Maintenance, troubleshooting and repair
8.1 Information about trouble‐
shooting
The DULCO
®
turb C also carries out gen‐
eral self-diagnosis. Any errors are dis‐
played in the bottom row of the display.
The DULCO
®
turb C operates three-stage
fault detection:
n
Warning, e.g.
[DESC]
–
A warning is merely a message
on the display which serves to
indicate a pending problem. No
alarms are issued. If, for
example, the drying agent alarm
is deactivated and the drying
agent is saturated, the LCD dis‐
play shows the warning
[DESC]
n
Error
[Err]
–
An error
[Err]
indicates a malfunc‐
tion or problem which can gener‐
ally be rectified by the operator.
This includes, for example, a
lamp failure
[LAMP]
or incorrect
calibration
[CAL]
. If an error
occurs, the sensor continues to
indicate values, however, the
accuracy of these measured
values is uncertain, meaning that
you cannot rely on the values
given.
n
Fault
[FAIL]
–
A fault
[FAIL]
is a system error.
This problem cannot be rectified
by the operator. The
DULCO
®
turb C must be sent
back to the factory for repair.
These faults are faults in the
[CPU]
,
[A/D]
,
[EEPROM]
or other
units built into the
DULCO
®
turb C. In the event of a
malfunction, the DULCO
®
turb C
will not function correctly and the
[FAIL]
message will appear in the
LCD display. Both alarm relays
are activated and the current
output is set to 2 mA.
Maintenance, troubleshooting and repair
68
