7.7 Adjustable settings
The user adjustable parameters are indicated with”U”.
The installer adjustable parameters are indicated with “I”
(basic pcb) or “P” (option pcb).
If the control detects an error, this is shown on
The display by means of a number, preceded by
a letter
F
(Failure). If a 3-way switch with filter
indication is mounted, the LED on the 3-way
switch will also start blinking. Error
F9
is
shown here is an example. This means some
thing is wrong with the wiring to the sensor, or
atmospheric temperature sensor.
The appliance remains in this error mode until
the problem in question has been solved. Then
the unit will reset itself (auto reset) and the
display will once more show operational mode.
The table on page 18 gives an overview of the
errors, possible courses and the actions to be
undertaken.
If the display shows the message
"FIL"
then
This means the filters have to be cleaned. If a
multiple switch with filter indication has been
mounted (= option), then simultaneously with
this message on the display, the LED on the
switch will light up.
After the filters have been cleaned or replaced,
key
"OK"
must be pressed during 1 second to
reset the filter indication.
The text
"FIL"
will blink for a moment and then
the display will return to operational mode.
16
Leaflet Number 611272 January 2012
Installation and Maintenance
MRXBOX90L Mechanical Ventilation with Heat Recovery
Adjustable settings
Description
Adjusting range
Factory setting
U1
Volume step 1
50..(MAX -10)
100
U2
Volume step 2
50..(MAX -5)
200
U3
Volume step 3
50..400
300
U4
Minimum atmospheric temperature bypass
5..20
10
U5
Minimum indoor temperature bypass
18..30
22
U8
Not applicable
0.1
0 (off)
U81
1
Fixed imbalance
-100..+100
0
2
No contact step
0, 1, 2, 3
1
3
Not applicable
2. 3
2
4
Switch line 1 step
0, 1, 2, 3
1
5
Switch line 2 step
0, 1, 2, 3
2
6
Switch line 3 step
0, 1, 2, 3
3
7
Imbalance permissible
0. 1
1 (yes)
8
Bypass mode
0, 1, 2
1
9
Hysteresis Bypass mode
0..5
2
10
Constant pressure switched off
0.1
0 (no)
11
Preheater or postheater
0, 1, 2, 3
0
12
Offset temperature preheater
-30..+30
0.5
13
Filter message on/off
1.0
1 (on)
14
Option pcb present
1.0
0 (no)
15
Heat recovery configuration
0.1
0 (heat recovery)
16
Fan off
1, 2, 3
1 (output fan)
17
Repeat time
1..24
24 (hours)
18
Minimum switch-off time fan(s)
1..240
60 (seconds)
19
Minimum switch-off time fan(s)
1..240
1 (second)
after switching on 230V
Installer
User
7.8 Faults
(also refer to the error code table (page 18)
7.9 Filter indication
- RESET -
- ON -
-
SET
-
-
OFF -
