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Danfoss Ltd

Ampthill Road

Bedford, MK42 9ER

Tel: 01234 364621

Fax: 01234 219705

Email: [email protected]

Website: www.heating.danfoss.co.uk

V1_12/14

User Overrides

Sometimes you may need to change the way you use your heating 
temporarily, e.g. due to unusually cold or warm weather.  The FP735Si has 
several user overrides, which can be selected without affecting the set 
programmes.  When user overides are active, the hand symbol will flash to 
indicate a manual change is active.
 

Move to the next event

 

Press the 

V

 button to move forward to the next event for the selected channel.  

Pressing the 

V

 button again to return to programmed operation.

Extend the current heating period by 1, 2 or 3 hours

Whilst the heating is on press the 

V

 button once to extend the heating time for 

the selected channel by 1 extra hour, twice for an extra 2 hours, and 3 times for 
an extra 3 hours, pressing the 

V

 button a fourth time will remove the override. 

     

Service Interval Timer

r

If the property is owned by a landlord, they may, for gas safety reasons, have 
instructed the installer to set the service interval timer.
 
If set, a visual and audible warning will alert you that the boiler will need 
servicing within the next 28 days. This warning is repeated each day at noon.
 
If the boiler is not serviced within 28 days, the daily audible warning will sound 
continuously and can only be cancelled by pressing any button on the unit.
 
In addition, all overrides and programming buttons will be disabled and the 
heating and hot water may only operate for a limited amount of time in each 
hour or not come on at all depending on the installer settings.
 
As this is a gas safety feature only an installer can reset the service interval 
timer, this will be done as part of the boiler service.

Channel Status
(Event number when programming)

 Channel Number

TIME

Days of Week (Numbers or Text)

KEY TO SYMBOLS

Flame: shows when heating is on

Hourglass: shows during programming delays

Padlock: indicates keyboard is locked

Suitcase: indicates Holiday Mode is set

   

Clock: Timed Modes
Hand: Manual Modes
Alarm: Indicates alarm is active. 

Also used for service due
3 on and 3 off events per day
2 on and 2 off events per day
1 on and 1 off event per day. All Day Mode
Timer (OFF) Mode
+  HRS: Extends function by 1, 2 or 3 hours
Timer (ON) Mode

 Display

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