SAF
– 4500
910101-000341 / 07.2019
Page 15 of 26
TROUBLESHOOTING
Before beginning any troubleshooting, carefully read the safety instructions in chapter 2 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:
•
The filter is clogged due to heavy dirt load or too high water flow rate.
Close the filter’s downstream valve.
Press the reset button to reset the fault mode. The fault indication
lamp is turned off.
Perform few consecutive manual flush cycles and monitor the PD
signal.
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.
•
The PD switch is faulty.
Ask your qualified electrician to check the PD connections and operation.
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 380VAC power supply 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 flushing 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 flushing 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 faults)
