Loop Leader PD6620 Series Loop-Powered Rate/Totalizer Instruction Manual
49
Troubleshooting Tips
Symptom
Check/Action
No display at all
1. Check that the 4-20 mA current loop is providing
at least 3.5 mA to the meter.
2. Check that the voltage drop of all devices con-
nected to the 4-20 mA current loop does not ex-
ceed the max rating of the loop power supply.
Not able to change setup or program-
ming,
LOCKED
is displayed
Meter is password-protected, enter correct five-digit
password to unlock.
Meter display flashes:
1.
99999
2.
-9999
Check that the number of digits required for the
scaled value does not exceed the maximum digits
for the display line. If it does, try adjusting the deci-
mal point location for less precision or changing the
PV display to the bottom line.
Display is unstable
Check:
1. Input signal stability and value.
2. Display scaling vs. input signal.
3. Filter and bypass values (increase).
Display response is too slow
Check filter and bypass values
Display reading is not accurate
Check:
1. Signal input conditioner selected: Linear, square
root, etc.
2. Scaling or calibration
Display does not respond to input
changes, reading a fixed number
Check display assignment. It might be displaying
max, min, or set point.
Display shows
MAX
,
MIN
,
RATE
,
TOTAL
,
or
GTOT
and a number
Max or min display has been locked. Press
Enter
to
unlock max/min display readings.
Relay operation is reversed
Check fail-safe settings in
Output
menu
Relays do not respond to signal
Check:
1. Relay action in
Output
menu
2. Set and reset points
3. Check manual control menu
If the display locks up or the meter does
not respond at all
Cycle the power to reboot the microprocessor.
Other symptoms not described above
Call Technical Support for assistance.
Note: Certain sequences of events can cause unexpected results. To solve these issues, it is best to start
fresh from factory defaults and map changes ahead of time, rather than at random. See
Reset Meter to
Factory Defaults
on page 47 for details on resetting the meter.
