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13 MAIntenAnCe
In order to ensure smooth operation, check the
tightness and function of the pressure sensor every
year.
➔ After carrying out the maintenance work, check
for tightness.
A zero point adjustment must be carried out at
operating temperature after the maintenance work
has been completed to ensure the best possible
accuracy.
13.1 Pressure test nipples
M1
M2
Relative pressure measurement (positive
pressure)
➔ The relative pressure is measured on a pressure
test nipple, M1 or M2.
➔ The unused pressure test nipple remains closed.
Differential pressure measurement
The differential pressure is measured on both pres-
sure test nipples, M1 and M2.
13.2 service
Process data are shown in the Service parameter
and a firmware upgrade can be carried out.
The Service parameter can only be accessed via the
web server. See TI DG smart, section entitled "Web
server".
14 AssIstAnCe In tHe eVent oF
MALFUnCtIon
➔ The backlight switches on automatically in the
event of a fault.
A warning or fault is shown in clear text in the bot-
tom section of the display.
50.0
Overpressure MAX
1 Press the OK button briefly (< 1.5 s) to display
the fault code.
Overpressure MAX
Error Code: 94
Module: 12
2 Press the Back key briefly to return to the status
display.
➔ Faults may be cleared only using the measures
described below.
CAUtIon
Please note the following to avoid damage:
– Fault-clearance must only be undertaken by
authorized trained personnel.
P1
P3
P2
mbar
Fault
➔ If these measures do not help to rectify the fault:
remove the unit and return it to the manufacturer
for inspection.
? Faults
! Cause
• Remedy
? too many remote resets?
! More than 5 resets have been conducted within
the last 15 minutes, either automatically or man-
ually.
• Consecutive fault caused by a previous fault
whose actual cause has not been remedied.
– Pay attention to previous fault messages.
– Remedy cause.
➔ The cause will not be remedied by performing a
reset every time a fault lock-out occurs.
➔ Check whether remote reset complies with
standards (EN 746 allows resetting only under
supervision) and correct if necessary.
• Press and hold the reset key. See page 8
(14.1 Resetting).
? Permanent remote resets?
! Warning: The unit is being permanently reset
remotely by the bus communication.
• Check the actuation for the remote reset and
cancel the signal.
? Mains voltage?
! The function for reading the mains voltage is
defective.
• Reset the unit once.
• If the measure described above does not help,
remove the unit and return it to the manufac-
turer for inspection.
? Under-/overvoltage?
! Supply voltage too low (< 24 V DC - 20%) or too
high (> 24 V DC + 20%).
• Operate the unit within the permitted mains
voltage range. See page 8 (15 Technical
data).
? Warn. Undertemp.?
! The ambient temperature is very low (in the
range from 0 to 5°C).
• Ensure that the ambient temperature is within
the permitted range. See page 8 (15
Technical data).
? Warn. overtemp.?
! The ambient temperature is very high (in the
range from 55 to 60°C).
• Ensure that the ambient temperature is within
the permitted range. See page 8 (15
Technical data).
EN-7
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