Opening the wallwasher


Read these notes through first. Treat the wallwasher gently. Any force when taking it apart or putting it together could damage the plastic or the screw holes or the PCB.

Take the usual anti-static precautions when handling any PCB.

Do not lose the screws! Make sure you know what screws go where.

The photographs used here show the centre light removed. There are normally three lights.

Start with the top

Carefully remove the plastic top (where the light shines through). This is best done by gently inserting a wide thin blade, such as a  butter knife or a screwdriver between the top and the back / front. The top snaps into place via three slots on the front and three slots on the back. Start with the front first as this is easiest to remove. Gently work you way around the sides and the back, being careful not to force it so you crack the plastic. It is a bit tricky and will take some patience. When you put the top back on, it should just snap into place once you have it lined up.

Fig. WO1:  Removing the top

When the top is removed

Remove the rubber from the base. This is just glued on. Make sure you put it somewhere so that the glue side doesn’t touch anything and you should be able to just press it back into place afterwards.

On the base, there are four screws for the front side and four screws for the back side.

Remove all screws from the front side.

Fig. WO2:  Screws in the base

Inside the wallwasher, remove the two screws that secure the light assembly to the front. Do not try and remove the assembly as it is still secured to the back of the wallwasher.

Fig. WO3:  Light assembly front screws and side screws location

Inside the wallwasher, you will see two small side screws – one on each side – near the top. These hold the back and front together. Remove these two screws.

You should now be able to pull the front away (pull it away towards you), leaving the light assembly still attached to the back by two small screws. Remove these two screws.

Fig. WO4:  Light assembly back screws

Each LED PCB is held in place on the light assembly by the surrounding plastic cover which is secured by four screws to four “legs”. Make sure you do not damage these legs, especially those on the two outer lights which are at an angle. They are thin and easily broken.

As with any plastic screw hole, do not overtighten the screw or force the screw or you can damage the thread in the hole. Make sure you use the right screws.

DO NOT TRY AND UNPLUG THE CABLES TO THE LED PCBS – the connectors are fixed.

Each LED PCB connects to the wallwasher PCB via ribbon cable to a plug / socket on the wallwasher PCB. You need to remove the PCB to be able to disconnect the plugs.

Fig. WO5:  Light assembly and cables. The standby switch has been unplugged

To remove the PCB

Unplug the cable to the standby switch.

Remove the four screws from the PCB.

Remove the four screws in the base that hold the back in place.

Gently pull the base away (pull it downwards).

The PCB will probably remain in the slots on the back.

The PCB can now be removed by gently pulling it away from the back.

To unplug the ribbon cable plugs

Do not tug on the cable or there is a chance that you will pull the top off the plug and pull the cable off the internal connectors.

I find the best way to unplug this type of connector is to grip the cable at one end of the plug using the index finger and with the thumb gently pressing on the top of the plug to take some of the strain. VERY GENTLY pull the cable up at one end of the plug so that end of the plug starts to come away. Do the same the other end. Repeat this a few times until the plug is clear of the socket.

Fig. WO6:  PCB screw locations

To replace the PCB

Plug the LED ribbon cables into the PCB. The plug / socket should be keyed so that the plug can only be inserted one way – the red strip lines up with the printed triangle and pins 1 and 2 on the socket print on the PCB.

Slot the PCB into place on the back, making sure that the sockets are flush with the back.

Line the base up with the back.

Note – there are two round guides on the base that fit into holes at the bottom lip of the back.

Make sure that the four PCB supports are lined up with the holes on the PCB and that they fit flush.

Screw the PCB into place.

Fig. WO7:  Round guides and PCB support

Assembling the wallwasher

Putting the wallwasher back together is basically the reverse of taking it apart

Using with light(s) removed

Light detection

Although the wallwasher lights are detected individually (left, centre, right), if one light is removed the others may not be detected.

This is something I need to confirm and follow up on.

I cannot remember if the other light(s) may just not be detected in Direct Control or not detected at all. So if you are testing the wallwasher lights and you have one or two wallwasher LED PCBs disconnected and the other light(s) don’t work, this may be the reason why.

If you connect the missing PCB(s) back (even if dud), all lights should then be detected OK

Standby switch

The wallwasher will work as normal if the standby switch is left unplugged, it just means that you can’t put the wallwasher into standby.

When switched on, the wallwasher default is ON. If the wallwasher has somehow ended up in standby and the switch is disconnected, all you need do is switch the wallwasher PSU off and on again at the mains. You could unplug the PSU from the wallwasher and plug it back in again, but I prefer not to do this as repeated use may damage the socket.

side screws light assembly front screws
light assembly back screws