NETAFLEX™ 3G USER MANUAL
15
TROUBLESHOOTING
This chapter is a systematic guide to the actions to be taken in the case of a malfunction of the NetaFlex™ 3G.
WARNING
Never perform maintenance/repair of the NetaFlex™ 3G when the system is under pressure.
Before performing maintenance/repair of the NetaFlex™ 3G, always set the controller to PAUSE.
After completing the maintenance/repair activity always set the controller out of the PAUSE setting back
to its previous setting.
ATTENTION
Before proceeding to troubleshoot any malfunction, make sure that:
• The controller settings regarding the dosing channels are correct and match the dosing channels
of the NetaFlex™ 3G (see the Controller Manual).
• The controller settings regarding the field valves are correct (see the Controller Manual).
Perform the actions in their order of appearance until the malfunction is fixed.
If you identify faulty parts - consult your local Netafim™ representative.
CAUTION
Only qualified electricians are permitted to perform electrical installations and repairs!
CAUTION
If isolation valves have been installed on the system, ensure that they are in closed position
before troubleshooting any hydraulic malfunction.
ATTENTION
If fertilizers from a different manufacturer have been recently in use and changes in EC and pH are
recorded, perform calibration of the system before assuming a malfunction of the NetaFlex™ 3G
(see Appendix 1 - Calibration, page 22).
Symptoms regarding more than one single dosing channel
If one or more of the following symptoms occur regarding more than one single dosing channel,
perform the actions listed bellow:
Controller warnings
• Low EC
• High pH
• Low fertilizer/acid flow rate
Rotameter reading
• Low fertilizer/acid flow rate
Action
1) For controller warnings only - check and calibrate the EC and pH sensors
(see the EC/pH Transmitter Manual).
2) Have a qualified electrician check that electricity is being supplied to the NetaFlex™ 3G and that all
the electrical components are properly connected (see the
Switchboard documentation
).
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