Please note that the phones in Fermax Loft even similar in design may be different electronically. Some models are working with 4+n system, some with VDS system. Only some parts are interchangeable like handsets, base, front cover. It is easy to do one-to-one replacement of the phones for 4+n system. Phones for VDS system requires programming which can be done by opening the Visitor Call Panel. In my experience none of the MCSTs allowed me to open Visitor Call Panel to do the programming of the replacement phone.

Fermax Loft Audio (3393, 3394, 3399) and Video Phones (3307, 3312, 3737) for 4+n system.

Fermax Loft Audio (3390, 3391) and Video Phones (3305, 3753) for VDS system.

Common problems and solutions:

1. No call sound, cannot hear the visitor on handset.
   – Replace handset or phone. Replacing handset alone may not work sometimes because the PCB of the phone is degrade due to the age. It is not possible to direct replacement of VDS phones because the programming is required.
2. There is call sound, cannot open the door / trigger the lift.
   – Replace PCB or phone. PCB replacement is not possible for Video models. It is not possible to do direct replacement of VDS phones because the programming is required.
3. All of the above.
   – Check with your neighbors or the management whether they have similar problem. If yes, the problem is on the side of the condominium management. If your neighbors don’t have the same problem – replace the PCB or the phone. It is not possible to do direct replacement of VDS phones because the programming is required.
4. No video on video phone.
   – Check video availability using another phone (for 4+n system phones only). If there is video on new phone – replace the phone. If there is no video on the new phone – the problem is on condominium side.

My suggestion is to replace your current phone with the new one in any case because electronics tend to degrade in Singapore climate.