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15. CHANGING THE BATTERIES
The 400A controller batteries can last up to 3 years when using name-brand AA
alkaline batteries. Actual battery life will depend on the sensitivity of the installed
batteries to temperature ranges experienced by the controller as well as the
number of valve operations programmed per day. To ensure proper operation, it
is recommended that the 400A controller be checked regularly and the batteries
replaced once the low battery indication starts flashing.
The 400A controller is designed to maintain the current time settings for up to 60
seconds with the batteries removed.
To change the batteries, see section 5.
Note: If the batteries are dead or drained, manual operation can also be
accomplished by turning the solenoid counterclockwise, or by turning the
external bleed screw counterclockwise. This will cause the valve to open.
Both must be turned clockwise to close the
valve.:
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16. MAINTENANCE, TROUBLESHOOTING AND REPAIRS
To restore the timer to the default settings
1. Press the
button until the START EVERY is displayed and the
appears on the bottom left of the screen.
2. Press and hold down the
for three seconds.
3. The screen returns to the home screen (clock) and all the default settings are
restored. The current time and date is retained.
PROBLEM: Timer fails to open automatically or manually
CAUSE: No water pressure
SOLUTION: Open main water supply valve
CAUSE: Flow control knob is turned down
SOLUTION: Turn flow control knob counter clockwise to open
PROBLEM: Timer functions via the manual mode only but not automatically
CAUSE: Timer is set to OFF mode
SOLUTION: Verify that the timer does not show OFF in current time mode
CAUSE: AM/PM not set correctly in current time mode
SOLUTION: Check current time, change AM/PM if necessary
CAUSE: AM/PM not set correctly in start time mode
SOLUTION: Check start time(s), change AM/PM if necessary
CAUSE: Rain delay is preventing watering
SOLUTION: Set rain delay to off
CAUSE: Yellow sensor wires have been cut
SOLUTION: Re-connect sensor wires together with waterproof connector
CAUSE: Sensor is installed and is in a state that prevents watering
SOLUTION: Check sensor and wire splices and verify sensor is normally closed
PROBLEM: The display is blank
CAUSE: No buttons have been pushed in the previous 15 minutes
SOLUTION: Push any button
PROBLEM: Valve fails to close
CAUSE: Solenoid is loose
SOLUTION: Tighten solenoid by turning it clockwise to the right
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