Mirage M-‐160 Installation and Maintenance Instructions
21
8.0 Troubleshooting
The following table identifies some of the more common observations, possible causes and
troubleshooting techniques that can be applied as a remedy.
No.
Observed Condition
Possible Cause
Troubleshooting
1
The sprinkler
doesn’t rotate or
rotates very slowly.
Sprinkler doesn’t
rotate at all.
De-‐pressurized
piping system
downstream of the
valve before
attempting the last
two possible root
causes
Dirt or sediment has
clogged the piston
drive area or speed
rotation filter
The speed control
filter is clogged.
The piston drive
area is filled with
sediment or piston
drive needs
replacement.
Clean the piston drive area by
removing and flushing with clean
water.
Open the speed rotation knob to
fully open during sprinkler
operation to see if any
improvement can be obtained. If
not, remove and clean the speed
rotation filter.
Verify the speed rotation knob is
fully opened to the clockwise
position.
Clean the piston drive area by
removing and flushing with clean
water. If problem persists,
remove and replace the piston
drive.
2
The M-‐160 is not
reaching the
expected radius
The main or lower
nozzle is clogged
with debris.
The operating
pressure is
inadequate for the
nozzle size installed
Raise the cover of the M-‐160 and
locate the “kick-‐stand” to hold the
sprinkler in the pop-‐up position.
Remove and inspect both main
and lower nozzles. Clear any
accumulated debris and re-‐install.
Using a Pitot tube while the
sprinkler head is operating
measure the dynamic pressure.
Compare this against the prepared
plans and delivery or output
pressure of the pump station.
Confirm the isolation valve is fully
opened
!
