Possible Problems; Faults With The Controller; Replacing Batteries; Reset - Viessmann VITOTROL 100 UTDB Operating Instructions Manual

14

Possible Problems

Possible Problems
Faults with Controller
System Characteristics Cause
Rooms are too cold
Rooms are too cold
Rooms are too hot
flashes on the display
Replacing the Batteries
• Use only alkaline batteries 1.5V
• Never use rechargeable batteries
• Replace both batteries every 18 months
The Vitotrol 100 has a power reserve of 3
minutes. If you replace the batteries within this
time, all set data is retained. If power reserve
has been exceeded, a reset will need to be
carried out (see below for more information).

Reset

Press the reset button with a suitable
instrument. After a reset, the language, time and
date will need to be set again.
The Vitotrol 100 is set incorrectly
The wireless connection to the
boiler control unit is interrupted
(only for Vitotrol 100, type UTDB-RF
with wireless connection).
At the receiver unit , the display
flashes
The Vitotrol 100 is incorrectly set
The batteries are spent
Remedy
Check the settings and correct if
required:
• Time program for heating mode
(see page 6)
• Room Temperature (see page 9)
• Time (see page 12)
Change the address code (see page
15)
Check the settings and correct if
required:
• Time program (see page 6)
• Room temperature (see page 9)
• Time (see page 12)
Change the batteries (see below)