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Resistance Check at Fuse

1)

Remove cover of controller. 

2)

Remove each fuse to test it. 

3)

Touch one probe to each side of the fuse.

4)

Check the reading on your multimeter.

Acceptable range:

Very low or zero (Ohms): OK.

A high value or Over-Range Indication (OL) indicates 
a bad fuse.

SET METER TO        

(blue area)

PROBE

CONNECTIONS

BLACK

COM

RED

V

RB.DM400.TGuide.mech  2/3/03  10:17 AM  Page 7

Summary of Contents for TI-DM400

Page 1: ...TI DM400 Digital Multimeter TROUBLESHOOTING GUIDE RB DM400 TGuide mech 2 3 03 10 17 AM Page 1...

Page 2: ...ystem Resistance check of each station 10 Voltage check of each valve 11 Voltage check of pump relay 12 WARNING This booklet is only intended to be a guide for using this product with other Rain Bird...

Page 3: ...the stations are work ing then you don t have any troubleshooting to do at the controller Step 4 Make a list of all of the stations that are not functioning properly Measure the output voltage for eac...

Page 4: ...this guide If the fuse is good proceed to Step 7 If the fuse is bad replace it and start again at Step 3 Step 7 Check the 120 V power being supplied to the controller according to the instructions pr...

Page 5: ...else 4 Turn power back on 5 Touch a probe to each wire nut to check power 6 Observe voltage reading on TI DM400 display 7 Turn power back off 8 Reconnect the lines inside of the controller 9 Turn powe...

Page 6: ...er lines that run into the terminal strip from the transformer Be careful not to touch the probes together 2 Check the reading on your multimeter Acceptable range 24 28V AC SET METER TO PROBE CONNECTI...

Page 7: ...3 Touch one probe to each side of the fuse 4 Check the reading on your multimeter Acceptable range Very low or zero Ohms OK A high value or Over Range Indication OL indicates a bad fuse SET METER TO b...

Page 8: ...n VDC 4 Touch one probe to the metal lead on each side of the battery 5 Check the reading on your multimeter 6 Replace the battery Acceptable battery test range Varies by battery type and manufacturer...

Page 9: ...oller to expose terminal strip 3 Turn controller to manual mode and activate the station or master valve MV to be checked 4 Touch insert one probe to the terminal labeled COM for common 5 Touch the ot...

Page 10: ...ked 3 Check the reading on your multimeter Acceptable range 20 60 Ohms Less than 20 indicates a short or crossed wires more than 60 indicates a broken wire bad splice or bad solenoid Note that station...

Page 11: ...two splice wires leading into the solenoid If it is easier disconnect the solenoid and just check the voltage drop across the two wires coming from the controller 3 Check the reading on your multimet...

Page 12: ...se a part of each of the two wires coming out of the relay 3 Touch a probe to each of the exposed wires 4 Check the reading on your multimeter Acceptable range 24 28 V AC Rain Bird Corporation 970 Wes...

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