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9. Troubleshooting
9.1 Sprinkler malfunctions
Malfunction
Sprinkler not rotating or only
very slowly.
Sprinkler not rotating at all.
Sprinkler has poor jet
Sector angle gets bigger during
operation.
Valve opens/closes only with
manual opening, but not on any
electric signal
Valve fails to open even with
manual opening
Valve fails to close
Output pressure at sprinkler
nozzle too low or casting range
too short
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Cause
Sealing disc worn out
Driving nozzle clogged
Minimum pressure of 43.5 psi not
reached
Nozzle is blocked
Spring stop is loose.
Spring force has slackened.
Spring stop has been
overextended.
Screw for <Manual opening> is set
to OFF
Core is jammed in the coil
No / inadequate power supply
Defective coil
Relief channel for coil blocked
Control pipe to the solenoid
clogged or bent
Control water hole or relief hole
blocked
Supply line under no / insufficient
pressure
Coil seat dirty
Bits of dirt between valve seat and
sealing plate
Defective membrane
Control water filter dirty or
Control water filter of the valve
filter dirty
Control pipe defect
Stones and bits of dirt are hinder-
ing an unimpeded passage of water
Valve insert is blocked
Remedy
Change sealing disc
Unscrew driving nozzle and clean
Increase pressure
Unscrew nozzle, remove and clean.
Fit new spring stop.
Turn screw to the left as far as it will
go, to Auto.
Remove coil and clean core
Establish 24V AC power supply
Check coil resistance (should be ap-
prox. 35 ohms). Replace if necessary.
Clean channel
Replace control pipe
Clean control water / relief hole
Establish pressure supply
Clean coil seat
Clean valve seat and sealing plate
Remove valve and replace membrane
Clean control water filter
Change control pipe
Clean valve and flush sprinkler
Clean valve insert see point 8.3
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