Nothing is displayed
on the room unit screen. There is no power supply:
Check your circuit breaker or the link
with the technical unit
The screen flashes
The unit displays:
There has been a lengthy mains power failure.
Reset the unit's clock.
Diagnostic /
Solutions
• Zone 1 feed sensor fault
• Communication fault between the technical
unit and the room unit
• Zone 2 return sensor fault
• Outdoor sensor fault
Contact your installer
Information function
This function can be accessed at any time.
Briefly pressing the button once displays the out-
door temperature.
Briefly pressing the button a second time displays
the room temperature in zone 1.
Pressing a third time exits the mode.
Home automation functions
Operation with a TYXAL alarm control unit
The Delta 200 receives and displays the “technical fault”
information from the TYXAL alarm control unit. In the event of a fault, the
display reads:
1. Intruder or technical alarm
2.Tamper alarm
3. Battery
4. Supervision
5. Open entry
6. Mains fault in progress
7.Technical fault in progress
In the following cases, the heating/alarm combination must be authorised
when the Delta 200 is set up (C16 = 0).
By default, the combination is not authorised.
On the AUTO position only:
Fully activating the control unit switches the installation into Economy
override mode in both zones.
Shutting the control unit down switches the installation into Comfort
override in both zones (up to the next change of program).
The override is cancelled:
By zone:
- the next time the program switches over in the zone
- by pressing the or button on the Delta 200
In both zones:
- by changing the position of the Delta 200 selector
Operation with a TYDOM telephone transmitter
You can call the TYDOM telephone transmitter and let the electronic voice
guide you to determine or modify the status of the heating system (see the
TYDOM transmitter instructions).
If a change is made via the TYdom telephone remote
control, the Delta 200 displays the switchover to
Comfort mode, for example.