Help! Replacement Fermax intercom handset

[James204]

Hi, I have an old intercom system which originally had a Bell intercom handset. That got replaced with a universal Fermax handset (works fine).

I am now trying to change the handset to a new fermax one which has a volume control (fermax REF. 03394 4+N EXTRA LOFT TELEPHONE). When I wire it up the same as the old one i can just hear the buzzer ringing in the telephone. when I take the white wire out it stops and i can hear outside noise.

This is the intercom wiring and both old handsets:-

Bell -- Old Fermax -- Intercom Wire Colours -- What I think they are for

Z -- 1 -- White -- Lock
R -- 2 -- Green -- Speach out
O -- 3 -- Orange -- Common
T -- 4 -- Brown -- Speak in
1 -- 6 -- Blue -- Ringer

There are three extra wires unused - white wire with brown dashes, white wire with orange dashes and a white wire green dashes (none of them ever used)

The new handset has the same numering system as the old one eg, 1, 2, 3, 4, 6

The manual for the new set does not give much guidance for replacing handset:-

http://docweb.fermax.com/docs/manuales/97341b Telefono Loft 4+n Basic-Extra Ref 3393-3394 V09_12.pdf

Is it possible to make this work? Anyone got any experience that might be able to help? Thanks!

 

[OwainDIYer]

Going by the manual you link to

Bell -- Old -- Colours -- Use -- NEW Fermax
Z -- 1 -- White -- Lock -- LOCK
R -- 2 -- Green -- Speach out -- MICROPHONE
O -- 3 -- Orange -- Common -- COMMON
T -- 4 -- Brown -- Speak in -- CALL WIRE
1 -- 6 -- Blue -- Ringer -- SPEAKER

It looks like you need to transpose 4 and 6.

 

[James204]

Thanks, I did try reversing 4 & 6 but made no difference/or is correct ( i can hear out and in).

The problem is with the white wire (1) as when connected and the receiver is hung up it continually buzzers at the intercom level downstairs. When I pick up the handset it stops?

I'm stumped, Have added pics (pic 1 old handset, Pic 2 New Handset) View media item 56160 View media item 56161