Arlec DC688 Installation & Operating Instruction Download Page 2

Code Selection

The push button unit generates random code sequences to which the chime unit is 

able to learn. Should your door chime unit activate intermittently for no apparent 

reason, the uncontrolled activation may be caused by another unit nearby or from a 

device operating on the same frequency.

Code/Push Button Limiting Switch

Your door chime unit is capable of working with a 

maximum of 4 Bell Push Button units at 4 different 

frequency channels. If your door chime unit activate 

intermittently for no apparent reason, it might caused by 

a nearby device working on a similar frequency channel. 

To eliminate frequency channel interruption, Code/Bell 

Push Button Limiting Switch is to limit the Bell Push 

Button unit and/or frequency channel that your door 

chime unit can be activated by. 

1.  Connect the Door Chime to the mains power and press 

the Bell Push Button once, the door chime will sound 

to indicate that 1st operating code is registered and 

memorized. This is the factory setting and intended 

to limit the activate frequency channel and Bell Push 

Button unit to 1.

2.  To register 2nd Bell Push Button operating code 

and/or frequency channel, Press and hold the code setting switch on the door 

chime unit for 1 second, it will give a “Beep” sound to indicate that door chime 

is ready to learn the 2nd operating code, press the 2nd Bell Push Button once, 

the door chime will sound to indicate that 2nd operating code is registered and 

memorized. This will allow 2 different Bell Push Button units and/or frequency 

channels working with the door chime at the same time.

3.  Repeat the same procedure for the 3rd and 4th Bell Push Buttons. The maximum 

amount of Bell Push Button units and frequency channels that the door chime 

unit can be work at the same time are 4.

4.  To reset Code/Bell Push Button limiting function, disconnect the door chime unit 

from mains power for at least 1mins, and reconnect, this will reset the door chime 

unit to learn 1 Bell Push Button and/or frequency channel only. 

Note: Power outage, surge or unstable main power supply will erase or rest the Code/

Bell Push Button limiting function, and low battery in push button unit will also erase 

or rest the registered frequency channel between the door chime and push button 

unit, if the door chime unit does not sound when push button unit depressed, please 

unplug the door chime unit from power point, replace batteries on push button unit, 

then re-plug the door chime unit into power point and set up both units again.

Resetting the Unit

To avoid uncontrolled activation:

1.  Switch off the Chime Unit for at least 1 minute.

2.  Switch back on. A double beep should be heard indicating that the unit is in 

learning mode.

3.  Press the Push Button. The chime should sound to indicate code selection.  

4

3

2

WARNING

This product contains a Lithium Coin type battery.
WARNING! Please ensure the coin battery is kept OUT OF REACH OF CHILDREN.
The battery presents a significant choking and burn hazard to young children 

should they swallow a battery. Under 4 year-olds are especially prone to 

accidental swallowing of objects such as these. 
If a lithium coin battery is swallowed, SEEK IMMEDIATE MEDICAL ATTENTION. 
Do not let the child eat or drink; Do not induce vomiting.
To keep your children safe:
•  Keep devices that use coin batteries out of reach of small children
•  Keep new batteries in their packaging until ready to use and store  

 

in places out of reach of children

•  Safely dispose of spent batteries immediately
•  Share this information with your family, friends, caregivers and babysitters.

We have designed the coin battery holder to require dexterity normally beyond that 

of a small child to access, but nevertheless you should always follow the advice 

given above.

Push Button

1.  Push Button unit is operated by 1 x 3 volt Lithium battery (CR2032 - included).
2.  Remove the back of case by pushing in the tab on the bottom with a small, flat 

screwdriver.

3.  The 3 volt Lithium battery (CR2032) is already installed. 
Simply pull off the isolation strip which will allow the battery to make electrical contact.

NOTE: When the push button unit is depressed, an orange LED light will lit on, but this 

is not an indicator of the push button unit battery level. It is recommended to replace 

batteries once a year to ensure range and transmission reliability.

To Replace the Battery

Remove the locking screw from the battery holder clip and remove old 

battery. Insert 1 x 3 volt Lithium battery (type CR2032) in the battery 

compartment, ensuring the battery polarity is correct as in Figure 1. 

Replace clip and tighten locking screw to hold battery firmly in place.

Chime Unit

The Chime Unit is powered by 240 volt and should be plugged into any 

convenient household power point.

INSTALLATIoN 
Chime Unit

Plug the Chime Unit into any household power point and switch power on. The 

Chime Unit indicator lamp will glow and it will beep twice to indicate it is ready. 

Press the push button unit to test the chime. 

NOTE: Do not mount the chime and push button unit near metal objects, UPVC frame, 

heat/radio source, security door or in close proximity to any radio emitting equipment. 

The range of the unit may be substantially reduced

.

Push Button Unit

The Push Button unit has two mounting holes on rear plate of unit that must be 

pushed through before unit can be mounted.
1.  Remove rear plate of unit (see battery installation).
2.  Push through tabs in mounting holes.
3.  Using the back plate of the Push Button unit as a guide, mark the position  

 

of holes onto mounting surface.

4.  Drill appropriately sized holes and insert wall plugs if required.
5.  Secure the back plate of Push Button unit to mounting unit.
6.  Clip Push Button unit to back plate.
Alternatively the Push Button unit can be attached to smooth mounting surfaces such 

as painted wood, glass and plastic using Self-Adhesive Pad (supplied).
Do not mount the push button unit on metal or near metal door frame, security door, 

metal furniture or in close proximity to any radio emitting equipment.  

The range of the unit may be substantially reduced.

Door Chime operation

Once the Push Button and Chime units have been installed in their desired locations, 

the system is ready for use.
Depress button on Push Button unit momentarily, and chime should sound. Press button 

again to repeat. Continual pressing of the button will not repeat the chime. If chime 

fails to sound, check batteries in push button and check power is on to Chime Unit.

Tone Selection

The Wireless Door Chime is supplied with 8 built-in chimes.
Westminster Chime 

Twinkle Twinkle

Double Ding-Dong 

It’s a Small World

Circus Theme 

Dog Barking

Banjo on My Knee 

Telephone Ring

To change the chime tune, remove the Push Button Unit’s rear cover. 
Inside the Push Button Unit locate the small Tune Selector push button marked ‘S’ 

(Ref. Figure 1). Each time that this Tune Selector push button is pressed, the next of 

the 8 melodies will be played. You can step through and listen to each in turn. When 

you hear the melody you wish to choose, do not press the tune selector again. The 

chime will play the selected melody each time the bell press is pushed. At any time 

you can select another melody by repeating the tune selector button process. 
Refit the Push Button Unit rear cover. 
Whenever the Push Button Unit battery is fitted or replaced, the chime tune may 

default to the Westminster Chime. 

Fig 1.

S

CPIN002725/2

Code/Bell Push 

Button Limiting 

Switch

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