Troubleshooting Guide

Featuring Built-In Error Detection

The Timer has a built-in error detection that senses an electrical short circuit or overload

condition on a Zone’s output line.

In the event of an error condition, the following steps take place regarding the

error:

• The aected Zone number and “Err” alert message will show on the display when the

unit is in either AUTO or WATER NOW mode.

• All irrigation for the aected Zone is cancelled and watering advances to the next

operable Zone in the irrigation queue.

Electrical Issues

Problem Possible Cause Possible Solution

Display shows error

message “Err M.” Timer

will not activate zones.

Problem with wiring to Master

Valve (if used). There may be

a break in the wire or a loose

connection.

Check wiring and connections to master valve. Repair or

replace wiring and valve if needed. To clear the ashing

error message, press NEXT.

Display is blank. Power not reaching the Timer. Verify the main AC power supply is securely plugged in

or connected and working properly.

Verify the power supply wires are connected to the

Timer “24 VAC” terminals. (Indoor model.)

Display is frozen and

Timer will not accept

programming.

An electrical surge may have

interfered with the Timer’s

electronics.

Unplug the Timer for 2 minutes, then plug it back in. If

there is no permanent damage, the Timer should accept

programming and resume normal operation.

Press and release the RESET button.

YYYY

NOTE: The Timer will attempt

to water the aected Zone

again at the next scheduled

watering. Completion of a

successful watering will clear

the error condition associated

with that Zone.

ST8 2.0 Timer

Troubleshooting Guide

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ST8 2.0 Timer Troubleshooting Guide Featuring Built-In Error Detection The Timer has a built-in error detection that senses an electrical short circuit or overload condition on a Zone’s output line. In the event of an error condition, the following steps take place regarding the error: • The affected Zone number and “Err” alert message will show on the display when the unit is in either AUTO or WATER NOW mode.
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Connection Issues Problem Possible Cause Possible Solution Connection issues between mobile device and timer. WiFi signal strength is low. Verify with your phone the WiFi signal is at least 2 bars of strength at the location of the timer. If it is not try to relocate the WiFi router so it is closer and does not have as much interference. If this is not possible, use a WiFi range extender to boost the signal strength. Timer is not connected to mobile device and WiFi module is blinking green.