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Troubleshooting Guide for Melnor 4-Zone Water Timer, Model 3280

Symptoms 

Possible Causes

Possible Corrective Action

After installing batteries and attaching the timer to the faucet, 
water is running out of the timer before it is programmed.

Knobs on valve portion are set to 

MANUAL

.

Turn knobs to 

TIMER

.

Valve(s) opened during shipment.

Remove battery holder.  Ensure cable from valve portion to timer 
portion is connected. Wait 30 seconds and re-insert. This should 
close all valves.

Use control button to move to 

MANUAL

 setting.  Set to “5 MIN”.  

Wait 10 seconds and then change setting to OFF to close the 
valve(s).

Timer shows battery LOW while batteries are fresh.

Batteries not making proper contact.

Remove battery holder, inspect battery contacts and adjust if 
needed.

Water does not turn on at programmed time.

PROGRAM

 set to “OFF”.

Set 

PROGRAM

 to “ON”.

TIME

 set incorrectly.

Update the 

TIME

 setting to the correct time.

Clock malfunction.

Reset by removing battery holder, wait for 30 seconds and reinsert.  
Set 

TIME

 to current time.  Previous program will work from 

memory.

Water does not turn off at programmed time.

TIME

 set incorrectly.

Update the 

TIME

 setting to the correct time.

Clock malfunction.

Reset by removing battery holder, wait for 30 seconds and reinsert.  
Set 

TIME

 to current time.  Previous program will work from 

memory.

Timer programmed for once a day does not come on or only 
comes on once per week.

Misprogrammed.

Confirm programming is correct.

WATER EVERY 

    1 Day = Once per day

WATER EVERY

     7 Day = Once per week

Timer programmed for once a week comes on once per day.

Antenna symbol flashes on screen but Automatic Rain Delay is 
NOT attached.

Automatic Rain Delay contacts on bottom of timer are wet.

Wait for contacts to dry.  

Reset by removing battery holder, wait for 30 seconds and reinsert.  
Set 

TIME

 to current time.  Previous program will work from 

memory.

TM

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