Holman N10372 instruction manual Servicing The Controller, Fault Finding Guide, Follow these steps

Models: N10372

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Servicing The Controller

The controller should always be serviced by an authorized agent.

Follow these steps:

1.Turn mains power off to the controller.

2.Disconnect 24 Volt power leads from the plug pack at the controller 24VAC terminals.

3.Clearly mark or identify all valve wires according to the terminals they are connected to, (1 to 6). This allows you to easily wire them back to the controller, maintaining your valve watering sequence.

4.Disconnect valve wires from the terminal block.

5.Remove the complete unit from the wall.

6.Carefully wrap the complete unit in protective wrapping and pack in a suitable box. Return to your service agent or the manufacturer.

Note: Tampering with the unit will cancel the Guarantee

7.Replace your controller by reversing this procedure.

Fault Finding Guide

Symptom

Possible Cause

Suggestion

No display.

Faulty transformer.

Check fuse. Check field wiring.

 

 

Fuse blown.

Check transformer.

 

 

 

Single Station

Faulty solenoid coil.

Swap faulty station wire on

not working.

 

controller terminal block with

 

 

known working station wire. If

 

 

the faulty valve still does not

 

 

work on the known working

 

 

connection then the solenoid coil

 

 

is faulty. The panel may need to

 

 

be repaired.

 

 

 

Fuse blows.

Incorrect wiring or bad

Check wiring and joints.

 

wiring joint.

 

 

 

 

No automatic

Incorrect

If unit works manually check

start.

programming or blown

programming. Check fuse and

 

fuse.

field wiring.

 

 

 

Buttons on

Short on keypad or

Check instruction book to ensure

keypad not

Programming not

programming correct. If keypad

responding.

correct.

still not responding return panel to

 

 

supplier or manufacturer.

 

 

 

System

Short on keypad or

Check number of start times

coming on at

too many start times

entered on each program. If

random.

entered on automatic

programming is correct return

 

programs.

panel to supplier or manufacturer.

 

 

 

More than 1

Damaged main output

Check wiring and swap faulty

station coming

driver chip.

station wire(s) on controller

on at once.

 

terminal block with known working

 

 

station wire. If the same outputs

 

 

are still locked on, return panel to

 

 

supplier or manufacturer.

 

 

 

Pump start

Faulty relay or pump

Electrician to check voltage on

chattering.

contactor.

pump relay or contactor.

 

 

 

Display

Display damaged

Return panel to supplier or

cracked or

during transportation.

manufacturer.

missing

 

 

segments.

 

 

 

 

 

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Holman N10372 instruction manual Servicing The Controller, Fault Finding Guide, Follow these steps