Liquid Controls SP2200 - Manual (Page 25)

23
PROBLEM SOLUTIONS POSSIBLE CAUSES
TROUBLESHOOTING GUIDE
Power is applied to unit but the display
does not light.
Unit works, but occasionally the display
freezes or skips counts.
Input signal is connected but the unit
does not count or display rate.
Rate is displaying: r FFFFF.
Relays are not activating properly.
Counter resets before reaching 999999.
1. AC or DC power wiring is incorrect.
1. Line noise is affecting the processor
due to a current spike or surge.
1. Input wiring is incorrect.
2. Scale factors are incorrect.
3. Transmitting device is defective.
4. Wrong debounce filtering selected.
1. The unit is trying to display a
number which it can't (too small or
too large).
2. Line noise affected unit on power
up.
1. Wrong relay duration.
2. Relay set for wrong activation
i.e. count instead of rate.
1. Relay duration is set at a value other
than 00.0. This causes the counter
to auto-reset at the preset.
1. Recheck power wiring
1. Use a different power supply or
install a surge suppressor.
1. Recheck input wiring.
2. Recheck scale factors and factor
calculations.
3. Replace transmitting device.
4. Recheck debounce filtering selection
"hi cps" or "lo cps".
5. To confirm set scale factors at one
and connect a wire to pin #7 and
touch it to pin # 5 (input A). Each
time pin #5 is touched counter A
should count once. If not, call
factory for RMA. (this test will not
work on units with quadrature input)
1. Check scaling factor, if it is correct,
lower the number of significant
figures.
2. Reprogram the unit and be sure to
enter a decimal (enter one and re
move it if a decimal is not desired).
1. Recheck programmed relay duration.
2. Recheck programmed relay
activation mode.
1. If relay outputs are not being used,
set the relays for rate.
2. Set the relay durations to 00.0.