Rev: 09.2017
EBS Pre-Engineered Skid IOM
10
TROUBLESHOOTING
Before beginning any troubleshooting, carefully read the safety instructions chapter of this document and make
sure that all the workers at the filtration site are fully aware of and comply with, these and any other local safety
instructions.
The filtration system may enter a malfunction mode in the following cases:
Symptom
Remarks and Actions
Fault due to
continuous signal
from the pressure
differential switch
for duration of
more than 15
minutes.
The fault
indication lamp is
lighted in red.
This fault means that the self-cleaning process is not successful.
This fault may be caused by one of the following reasons:
A.
The filter is clogged due to heavy dirt load or too high water flow rate.
o
Close the filter’s downstream valve.
o
Press the reset button to reset the fault mode. The fault indication lamp is
turned off.
o
Perform few consecutive manual self-cleaning cycles and monitor the PD
signal.
o
Once the filter is clean gradually open the downstream valve and monitor the
PD and the flow-rate. Make sure that the filter doesn’t exceed its designated
flow-rate.
B.
The PD switch is faulty.
o
Ask your qualified electrician to check the PD connections and operation.
o
Replace the switch if found faulty.
The motor
protector was
activated.
The fault
indication lamp is
blinking in red.
This fault means that the motor was operated under too high load.
Note: All the following checks and actions should be done by a qualified electrician only.
A.
Check the motor power consumption when not loaded.
B.
Check the limit switches for correct operation and verify that each one of them stop
the motor at its designated point.
C.
Verify 3 phase power to the control board and the motor.
D.
Disconnect the drive unit from the suction scanner shaft and verify free turning of
the suction scanner
Note: If during this fault a request for self-cleaning is received (Manual, Time or DP) the
blinking lamp switches to constant red.
Malfunctioning
limit switches
The fault
indication lamp is
blinking in red
Faulty limit switch may not stop the motor at the right point and therefore the motor
protection may be activated.
Receiving signal from both limit switches at the same time causes fault.
A.
Check that the limit switches are not mechanically stuck.
B.
Ask your qualified electrician to check the wiring and the functionality of the limit
switched.
Note: If during this fault a request for self-cleaning is received (Manual, Time or DP) the
blinking lamp switches to constant red.
The fault
indication lamp is
blinking in red
after the reset
button is pressed
This means that the mechanical/electrical fault still exists.
(Overload or Limit Switches fault)