Leakwise PS-220 - Page 28

PS-220 RD1 USER GUIDE Revision 8 November 2017
28
PROBLEM
POSSIBLE CAUSE
POSSIBLE SOLUTION
FAIL / DETECTOR
DISCONNECTED indicator
is on.
Sensor is not properly
connected.
Check field cable coming
from the sensor. Refer to
wiring diagram.
Abnormal signal output
from the Sensor because
of Sensor malfunction.
Disconnect the Sensor
from PS-220, and connect
it to 12 VDC power supply
("+" to DET+ wire, "-" to
DET- wire). Measure DC
current between SIG wire
and DET- wire. The
readings should match the
ones written in the Sensor
Test Certificate in water
and air.
Otherwise, consult factory.
If Safety Barriers are
installed:
Safety Barrier failure.
Resistance between points
1 and 3 of Barrier should
be: for MTL715+ or 7715+:
155 ohms maximum; For
MTL710+ or 7710+: 85
ohms maximum (refer to
wiring diagram). Otherwise,
contact your agent.
If 4-20mA output is used,
and also Safety Barriers
are installed: Ground loop.
Use a 4-20mA device that
is not grounded to earth, or
connect a 50 Ohm resistor
in series with TB4 point 2.
Internal wire inside
PS-220 enclosure is
loose.
Check internal wiring (refer
to wiring diagram).
Re-connect loose wire.
No sequential lights after
pushing TEST button.
No full-scale Bar-Graph
indication.
System is extremely out
of calibration.
Re-calibrate, refer to
Section 4.
No full scale 4-20mA
output.
Internal wire inside
PS-220 enclosure is
loose.
Check wiring (refer to
wiring diagram).
Re-connect loose wire.
Blown fuse F1.
Replace fuse.
Remote recorder does not
receive 20mA.
Load is higher than 400
ohms.
Reduce load.