12
TROUBLESHOOTING GUIDE
SYMPTOM
CAUSE
DIAPHRAGM VALVE REMEDY
(See Valve Disassembly Procedure A)
PISTON-TYPE VALVE REMEDY
(See Valve Disassembly Procedure B)
4.
Water leaks out at sprinkler
head when station is off.
(Continued)
D.
Low head drainage. (Continued)
Stop watering on the soggy zone for two days.
Check the lowest head on the line.
If area is very wet or a small amount of water
drips from sprinkler, see 4-A and 4-B above. If
area around sprinkler has dried out somewhat,
the problem is probably due to drainage from
the piping.
5.
Valve won't turn off manually.
A.
Valve in "Manual On" mode.
B.
Valve closing mechanism stuck in
open position.
C.
Solenoid energized
• See 3-E above.
• See 3-C above.
• Stop power to valve.
• See 3-E above.
• See 3-C above.
• Stop power to valve
6.
Valve won't turn on manually.
A.
Flow control in closed position.
B.
Valve opening mechanism blocked
by debris.
C.
Valve in "Manual Off" mode.
• See I-C above.
• See 2-D above.
• See 2-A above.
• Turn gray ring counterclockwise to in-
crease flow.
• See 2-D above.
• See 2-A above.
7.
Water leaks out at valve.
A.
Leaking round pipe connections.
• Tighten connections (use teflon tape only).
• See recommendations at left for di-
aphragm valve.
B.
Leaking around actuator assembly.
• Not applicable.
• Tighten actuator to body (See Valve Dis-
assembly Procedure B) Be sure O-ring seal
is in place. Do not use pipe dope or teflon
tape or tighten with such force as to crack
plastic valve body.
-
C.
Leaking between bonnet and body.
• Check that diaphragm washer is properly in
place. Tighten bonnet screws.
• Not applicable.
D.
Leaking under anti-siphon cap.
(Anti-siphon models only).
• Not applicable.
• Float under cap is not moving freely due
to debris. Turn off water and unscrew cap.
Clean out area around float and replace
float and cap.
• Not applicable
• Valves not installed 6" higher than highest
sprinkler head. Raise position of valve or
redesign system.
• Not applicable
• Insufficient water pressure (See I-D)
• Not applicable
• Vacuum breaker cap or valve body
cracked. Replace as necessary.
8.
Valve slams on/off (water ham-
mer)
A.
Excessive water pressure.
• Install pressure regulator on line before valves
to reduce pressure.
• See recommendations at left for di-
aphragm valve.
B.
Valve closing/opening mechanism
worn.
• Replace diaphragm with model number appro-
priate for your valve. Call our Technical Service
hotline for assistance in identifying valve or part
numbers. 1-800-RAIN-BIRD
• Replace piston with PRK-100 piston re-
placement kit.
C.
Air bubble in line
• Shut off water at main shut off valve and drain
the line to release air bubble. Slowly refill the
line.
• See recommendations at left for di-
aphragm valve.
D.
Valve too small for amount of flow.
• Replace with larger valve
• Not applicable
9.
Water runs continuously when
valve is not activated; shuts off
when valve is activated.
A.
Valve installed backwards.
• Reinstall valve according to arrows on valve
depicting direction of flow.
• Not applicable.