Parker PFM1 Series, Installation And Operation Manual

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Troubleshooting
15
LED Indication
LED Indication Cause and Corrective Action
1 ERROR lamp (Red)
Illuminates when signal is abnormal.
Check for damage and proper connection.
Make sure detector body is filled with liquid and contains
no bubbles.
2 AGC/ZERO lamp (Red)
It blinks when Zero adjustment is being performed. LED
will continue to blink until Zero adjustment is finished.
It remains lit if Zero adjustment is failed. Check if the
piping is filled with liquid and the flow has stopped,
perform Zero adjustment again.
3 ALARM lamp (Red)
It turns on if the high or low alarm is activated.
Change the alarm setting point or adjust the flow rate
outside the alarm setting range.
Current output
type
Output type
Set analog output type. 4 to 20 mA has been set at
delivery. 0 to 10 V output is optional.
If the flowmeter is not functioning properly the primary causes are related to: wiring, installation, measuring
fluid, and the meter itself. The following section gives the user a chance to diagnose and correct any issues
contributing to the malfunction. Possible causes are listed below for each trouble phenomenon.
P-Out High Alarm Low Alarm Communication
Output
A-Out Error LED Alarm LED
ON *1 OFF ON 0 mL/min
Keep previous
values *2
ON ON
Output Status at Malfunctioning
*1 Only when Fault output is selected
*2 Either 0mA, 3.2 mA, 21.6 mA, 22.0 mA is selected as an option
Troubleshooting
Refer to the following table for troubleshooting potential problems. Use the observed symptoms to determine
what corrective action should be followed.
Problem Observed
Cause and Corrective Action
1 The LED display is not correct.
A: When LED display is not correct.
2 All LEDs are blinking vaguely.
3 The zero point adjustment is unsuccessful. B: When zero adjustment is not working properly.
4 Zero (0) is still indicated even if a fluid is running. C: When nothing is indicated while running the fluid
5 The zero point is unstable.
D: When the zero point is unstable
6 The indication appears at the zero point or ranges out.
7 The indication becomes unstable when running a fluid. E: When the output is unstable
8 The actual flow rate does not conform to an output.
F: When the actual flow rate does not conform to the
indication
9 The indication ranges out when running a fluid.