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9. Troubleshooting
9.1 Sprinkler malfunctions
Malfunction Cause Remedy
Sprinkler not rotating or only very
slowly.
Sprinkler not rotating at all.
Dirty water.
Speed regulator set to minimum.
Blocked
Fully open regulating screw, dirt
gets ushed out
Clean lter
See points 8.4 and 8.5
Defective piston drive Piston drive must be replaced, see
repair instructions TDP055e-rep
Sprinkler has poor jet Nozzle / funnel is blocked Unscrew nozzle, remove and clean.
When tting nozzle, make sure it
is in correct 12 o’clock position;
grease nozzle thread.
Arc angle gets bigger during
operation.
Spring stop is loose.
Spring force has slackened.
Spring stop has been
overextended.
Fit new spring stop.
Sprinkler’s bearing is leaking. Groove ring is worn out. Can be repaired only by the
manufacturer.
Valve opens/closes only with
manual opening, but not on any
electric signal
Screw for <Manual opening> is set
to OFF
Turn screw to the left as far as it
will go, to Auto.
Core is jammed in the coil Remove coil and clean core
No / inadequate power supply Establish 24V AC power supply
Defective coil Check coil resistance (should be
approx. 35 ohms) and replace if
necessary
Relief channel for coil blocked Clean channel
Valve fails to open even with
manual opening
Control water hole or relief hole
blocked
Clean control water / relief hole
Supply line under no / insucient
pressure
Establish pressure supply
Valve fails to close Coil seat dirty Clean coil seat
Bits of dirt between valve seat and
sealing plate
Clean valve seat and sealing plate
Defective membrane Remove valve and replace mem-
brane
Control water lter dirty Clean control water lter
Output pressure at sprinkler
nozzle too low or casting range too
short
Stones and bits of dirt are hinder-
ing an unimpeded passage of water
Clean valve and ush sprinkler
Valve insert is blocked Clean valve insert see point 8.3
We reserve the right to make changes in line with technological advances, including without prior notication.
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