9
I.S.E. S.r.l.
Via Dell’artigianato 1/3
00065- Fiano Romano (RM)
Tel. 076540191-Fax 0765455386
www.irritrol.it
7.3 Break-down and elimination of the defects
Break down
Cause / reason
Elimination
Valve opens / closes only
manual not by electrical,
Coil or coil seat is dirty
Remove coil and clean it,
see point 7.1.
Control signal
Supply voltage is too low
(24VAC/DC)
Check supply voltage and
cable connections
Coil is broken
Check coil resistance
(must be appr. ca. 30
Ω
)
Plunger in coil is seated
Change coil
Valve does not open, even
not manual
Seal of valve insert is
defect
Change valve insert (see
point 7.1.)
Exit for control water on
cylinder of the valve is
blocked
Disassembly control pipe
out off connection and
blow through backwards
Valve does not close, even
not manual,
Filter for control water is
dirty
Disassembly valve insert
and clean filter or change it
(see point 7.1.)
Leakage in the control
water path
Check all connections,
control pipe and pressure
regulators units for
leakage’s and eliminate
them.
The pressure on the
sprinkler nozzle is too low.
Valve is blocked
Disassembly valve and
flush pipes (see point 7.1)
7.3.1 How to check sprinklers, which do not open
Check solenoid in or at the controller for efficient operation.
Engage valve and check at the relief exit of the controller for a brief water splash
to come out
Exchange solenoid at the controller only when there is
no
pressure
in the line
7.3.2 How to check sprinklers, which doesn’t close
Control line has not been ventilated completely.
Foreign particles are blocking the valve
There is a leak in the hydraulic system.
The retaining circlip [9] on top of the valve is not fitted correctly and the valve has
been pushed out of it's seat by the operating pressure.
Check the outlet of the solenoid valve for correct functioning. To implement this,
disconnect the control line. The valve at the controller is normally open (without
current).
Subject to change without prior notice.
