ABB XSeriesG4 User Manual page 141

7.2.3 Troubleshooting a Low Charger Alarm (LC)
The Low Charger alarm is typically displayed if battery charging voltage is less than (+) 0.4 Vdc higher than battery voltage or
low light conditions exist and system is charged using a solar power charger.
To troubleshoot a Low Charger Alarm (LC):
Check the battery pack cable. It must make a good secure electrical connection with the main electronic panel BATT
CONN connector J1 (Figure 96:).
Connect the PC running PCCU32 to the flow computer with either an MMI cable (RS-232), a USB cable or an
Ethernet cable.
Open PCCU.
Select the Entry button from the toolbar
Select I/O Subsystem > On-Board > Auxiiliary I/O. If the charger is less than +0.4 Vdc proceed to Power
Troubleshooting section.
7.2.4 Troubleshooting a Analog to Digital Failure Alarm (AD)
The flow computer must have a measurement tube application running to receive this error. If A to D Converter readings are
within range, AD is shaded. If the A to D Failure alarm code is present, or if the device is in the SLEEP mode, but is still
receiving minimum voltage, it may be necessary to test the data link between the main electronic board and the transducer.
Follow the instructions below to check transducer.
Probable causes of receiving the A to D Failure include:
— A/D Converter is over or under range (DP, SP or Tf)
— Loose wiring connections
— Faulty RTD probe
To troubleshoot an Analog to Digital Failure Alarm (AD):
Begin by collecting data from the flow computer, see section, 5.2.1 Data Collection, page 89.
View the event log in PCCU for codes:
–99 A/D converter could not be read
-
–100 A/D converter could be read again.
-
If the event code is found, follow guidelines for returning transducer to Totalflow for repair or replacement. If the event
code is not found, continue to the next step.
Connect the PC running PCCU32 to the flow computer with either an MMI cable (RS-232), a USB cable or an
Ethernet cable.
Open PCCU.
Select the Entry button from the toolbar.
Select I/O Interface.
Select the On-Board tab from the open pane.
Check the SP, DP and temperature to determine which measurement channel is causing the alarm.
- If alarm is caused by the SP or DP channel, equalize and vent manifold.
- If alarm disappears: SP or DP cell is not ranged properly or
manifold may have blockage.
- If alarm is still present, replace transducer.
- If alarm is caused by the temperature channel, skip to Step 9, otherwise go to next step.
Set the XIMV back to Factory calibration. If this corrects the alarm, recalibrate the XIMV to correct field calibration. If
the alarm is not corrected, continue to next step.
Verify the Flow Computer is not displaying a LL (Low Lithium ) alarm.
Perform a Warm start on the Flow Computer, see section 5.3 Performing a Warm Boot, page 90.
142 XFC G4 2103335 Rev AB