advertisement
Project design, installation and service manual
Page 57 of 72
ELIS PLZEŇ a. s.
Electromagnetic flowmeter FLONET FH30xx
11.4 Fault identification
Make sure to de-energise the meter prior to starting any actions related to fault identification and repair, such as opening the transmitter housing, checking the power cable connections, disconnecting the meter sensor or removing PC boards from the transmitter housing.
Nevertheless, some operations require that parts of the meter or its PC boards remain live. In such cases proceed with utmost care to minimise the risk of electric shock.
Operational/functional tests on the flowmeter can be performed using the RS-485 MODBUS RTU serial communication line and program FLOSET 4.0.
To carry out any on-site meter repair actions the user will need a set of spare PC boards tested and preset at the manufacturing company. Such repair actions consist of replacement of the defective PC boards. If the given type of defect is associated with a malfunction of any specific PC board, the user may try to replace such board upon opening the respective cover of the meter transmitter.
The flowmeter software includes internal control and diagnostic algorithms the purpose of which is to identify meter defects and show the corresponding error code on the meter display.
Should the error code displayed imply a sensor defect, the sensor can be substituted by the sensor simulator SF1.0 (applicable to the remote meter version only).
Error code
Error description Likely error cause and error removal procedure
E00 No error
E01 AD range overflow
E02 Flow-rate step change
E03 Memory read/write error
E04 Other types of electronic unit error
E05 Error message in cases where it is not possible to calibrate zero flow rate
E06 Low excitation current
E07 Shorted coil circuit
E08 Information – zero setting in progress, measurement discontinued
E09 High resistance of measured fluid
E10 OUT1 output error
-
Excessive flow rate (a short-term step change in flow rate from 0 to Q
4
). If the error condition is of a continuous nature, the fault will be in the measuring
PC board.
See error code E01
If RTC time error is too big, replace back-up battery on the processor board.
Should this not help, replace electronic unit (the processor, output and/or measuring PC boards).
Should the error condition continue, replace electronic unit (the processor, output and/or measuring PC boards).
Wait for a few seconds and repeat zero flow rate calibration. Should the error condition continue, replace electronic unit (the processor, output and/or measuring PC board).
Disconnected excitation circuit
– defective sensor or broken connection between the transmitter and sensor.
Defective measuring PC board.
Should the error condition continue, replace electronic unit (the processor, output and/or measuring PC board).
Short in excitation circuit – defective sensor or a short circuit in the connection between the transmitter and sensor.
Check the conditions of signal cables. Replace sensor by sensor simulator
SF1.0.
Flow measurement discontinued for one minute. Upon completion of the zero-setting procedure, this information message disappears from the display and measurement can continue.
Indication of a not fully-flooded piping condition.
E11 OUT2 output error
E12 Information on excessive current
E13 Incorrect time setting
E14 Exceeding the value of the overload flow rate Q4
Output frequency in excess of 10kHz. pulse output frequency in excess of 100Hz.
Time period between pulses is shorter than pulse length.
See comments to error E09 related to the OUT2 output.
Incorrect configuration of the current output.
Current beyond the range of 4 to 20mA
The output current does not correspond to the flow rate range.
Incorrect time setting following back-up battery replacement.
Should the error condition continue, replace electronic unit (the processor, output and/or measuring PC board).
Check the setting of Q 100%.
Should the error condition continue, replace electronic unit (the processor, output and/or measuring PC board).
ELIS PLZE Ň a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, phone.: +420 377 517 711, fax: +420 377 517 722 Es 90678K
advertisement