User’s & Technical Manual –
P/I LEVEL TRANSMITTER PIT7000
GELEC
Industrial Electronics
PAGE
10
ERROR 1 - STATUS LED FLASHING RED (3Hz)
Check the device for the following possible problems.
1) mA OUTPUT OPEN CIRCUIT
A simple way to confirm that you have an open circuit, is to cut power supply, disconnect
the external circuit from the mA output and short-circuit terminals #5 and #6 with a cable.
Turn on the power for a few seconds, the problem should be solved and the PIT7000 should
not be in Error state. Check the external circuit for disconnections.
Notice that if you are using only the V output, a 390
Ω
resistor must be connected at the mA
output (terminals #5 and #6). Consult the relevant connection diagram and confirm that
this resistor is properly connected.
2) HIGH LOAD RESISTANCE R
L
The load resistance value connected to mA output (including line resistance), may be higher
than it should be. Refer to the relevant table and confirm that the externally connected
circuit has the proper resistance value.
3) INTERNAL OVERHEATING
Internal overheating is unlikely to occur and may be caused due to wrong electrical
connections, excessive temperature in the installation area, or PIT7000 hardware damage.
Confirm that all connections and installation environment meet the device specifications.
ERROR 2 - STATUS LED FLASHING RED (1Hz)
INTERNAL HARDWARE FAILURE, OR DAMAGED SENSOR DUE TO EXCESSIVE PRESSURE.
Check all electrical and pneumatic connections and ensure that you have a proper layout.
Disconnect/connect power supply. If this error remains, the device has a non-repairable
damage. Hardware failure or excessive applied pressure are the possible causes.
Before replacing the damaged device with a new one, ensure that any possible problem
that causes overpressure to the sensor (wrong connections/clogged pipes) is solved.
