ROTOTERM MR-TR
17
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Before calling service
Most frequent faults which appear during operation of automatic regulation unit and are consequence of
wrong settings or wrong connection.
Malfunctions, which are described in the table are all the result of incorrect installation and incorrect settings. You can remove them
and you do not need to call service technician.
If eventually a change of operating mode of automatic unit appears which is not common, first check eventual faults of settings and
installation. See Instructions for MR-TR controller and check if connection between controller and AS 2000 room unit is correctly
performed.
Before starting up and if error occurs we recommend to first check the following:
- is electric fuse in phase of automatic unit installed and if operates,
- is main switch ON,
- are all connections performed,
- is fuel in reservoir or inlet gas valve open,
- is heating really required - check outside temperature,
- is boiler temperature high enough regarding setting of boiler condense point.
If all above specified conditions are fulfilled and you haven find the cause for fault, see the following table. In case you still can
not find and eliminate the fault, call our authorised technician.
AS2000-E
Problem
Solution
The display will appear EEE
Slide switch 2 is moved to the position . Before setting the program is necessary
to set the correct time and date.
Timer is not running
Slide switch is in position or . Move it in position AUTO.
Time flashes
Time is not set.
The program is not running
- move slide switch 2 to position AUTO
- program is not set. See the example of program settings.
- the program is incorrectly configured:
- for each switch cycle to a higher temperature, is followed
switch cycle to a lower temperature
- for each switch cycle must be set the day or group days
- make sure the time settings do not overlap
Display is beginning to fade
The batteries are exhausted. We recommend changing batteries before the start of
each heating season (at least every 2 years).
ROTOTERM MR-TR
STATUS
POSSIBLE FAULT
REMEDY
At outside temp. +10°C the room is warm
enough, at temp. -10° it is too cold.
Heating curve set too low.
Set the curve to higher value.
In room should be higher (day) temperature
but is too cold.
- Timer settings.
- Digital timer - overlapping of
switch cycles
- Check timer setting
Regulation motor does not rotate.
- No supply from controller
- Faulty motor
- Too hard (blocked) mixing
valve.
- Check terminal pins 17, 18 and 19,
- Check mixing valve and its rigidity.
Regulation motor rotates, mixing valve
does not respond.
- Broken safety forks (only by
MV120/09E,...)
- Broken lever on handle.
- Replace safety forks on handle,
- replace handle.
- check handle end positions
Regulation motor does not stop in final
positions.
- Valve handle displaced.
- Check final positions of the handle.
LED for valve opening
( )
is ON on
controller, mixing valve is fully open, hot
in the room
Interrupted
- outside sensor AF,
- mixed flow sensor VF,
- AS 2000 room unit .
Check
- resistance of AF,
- resistance of VF,
- room unit.
LED for valve closing ( )is ON on controller,
mixing valve is closed, too cold in the room
Short circuited
- outside air sensor AF
- AS 2000 room unit
- sensor VF
- under floor sensor BF
- slide switch in
position.
Check
- resistance of AF, VF and BF
- supply from AF, VF, BF and room unit
- set selector switch 5 to
position .
