2880R-LT, 2881R-LT, 2882R-LT
Revision 1.0
P a g e 24 | 28
9.0 TROUBLESHOOTING
CONDITION
DO THIS
1. Status LED is OFF and the LCD
display if off
Check the power to the unit. If the unit is a 12VDC or
24VDC model, check the external source and polarity is
correct. If the unit is a 100-240VAC model, then check the
Line, Neutral and Ground wiring is correct.
2. If the status LED is RED
This indicates a major error such as memory failure, no
probe signal etc. Check the following:
•
Make sure the PMC is installed & the PMC wiring is
correct and there are no breaks in the wiring. At the
controller, measure across the Probe Input terminals
with a DC meter. Make sure “Common” lead of meter
is on ‘-‘ terminal. It should read (+) 8 to (+) 10 VDC with
the PMC connected and approximately 20 to 24 VDC
with the PMC terminal disconnected.
•
Microprocessor may have lost its parameters due to a
power surge in the line. Go to Diagnostic in view Menu
(see section 10.0 Flow Chart) to check the Calibration
values, frequency and capacitance values then, call
Arjay Technical Support.
3. No mA output OR incorrect mA
output.
IMPORTANT: THE UNIT
SOURCES
mA OUT FROM
THE mA OUTPUT TERMINAL.
THIS TERMINAL
SHOULD NOT BE CONNECTED TO +24V.
IT IS NOT
A 2 WIRE mA TRANSMITTER. See Figure 3 for
Electrical hookup details.
•
Disconnect external wires from mA output and measure
with mA Meter.
•
Check the mA output Action (direct or inverse) and mA
output Span are set as desired. See section 10.0 Flow
chart / Change menu.
•
If the mA output still does not match the level, then call
Arjay Technical Support.
4. Level reading is not correct
•
Make sure probe is properly grounded to Tank.
•
Ensure that there is a parallel ground reference with
probe via Tank wall or concentric shield.
•
Go to View Menu, then select CAL. Write down the
%level and pF reading of each CAL point. Go to DIAG
menu and verify existing pF reading. If pF reading is
within range of CAL point then unit can be trimmed by
Entering a new CAL point in manual CAL under change
menu. If pF way out of range then check what changes
may have occurred since initial CAL. E.G. different
material, new location for probe, Temperature.
5. CAL Error
No Change
•
Make sure blue wire from probe end is connected to “P”
terminal plug of PMC2800.
•
Make sure level is changing in tank when performing
2
nd
Cal point.
6. “NO SENSOR”
•
Capacitance reading is less than 5pF.
•
Verify that the blue probe wire is connected to “P”
terminal plug of PMC2800 Probe input.