14
Leaflet Number 611272 January 2012
Installation and Maintenance
MRXBOX90L Mechanical Ventilation with Heat Recovery
Step number
Readout (example)
Description
Remark
No. 1
2.200
Current position/outlet volume m
3
/h
No. 2
CO
Message code operating condition
CO = No message
C3 = The inlet fan runs in constant pressure mode
C6 = The outlet fan runs in constant pressure mode
C7 = Correction maximum air flow
No. 3
bP.1
Bypass status (only if mounted)
0 = bypass valve shut
1 = bypass valve automatic
2 = Input at minimum
No. 4
tP.9
Temperature from atmosphere (°C)
At negative temperature (below 0°c) than readout tP.9.
No. 5
tS.21
Indoor temperature (°C)
No. 6
In.0
n.a.
No. 7
u.156
Current input volume m
3
/h
No. 8
u.156
Current output volume m
3
/h
No. 9
t.180
Current pressure inlet duct (Pa)
No. 10
A.180
Current pressure outlet duct (Pa)
No. 11
u0.0
Status frost protection
0 = none, 1 - 4 = imbalance, 5 = inlet fan off
No. 12
St.9
Temperature to atmosphere (°C)
If not connected St.75
(Sensor not connected as standard)
No. 13
Pt.18
Temperature to indoors (°C)
If not connected Pt.75
(Sensor not connected as standard)
Installer
User
7.1 Readouts settings
The standard current position of the multiple
switch and the connected outlet volume are
shown (operational mode). on the left of the
multiple switch to the left of the dot. The three
remaining positions shown to the right of the
dot represent the volume of the outlet air.
a = position multiple switch is set at
b = volume of outlet air (m
3
/hr)
7.2 Reading out settings
by the user
The user can read out other relevant data using
keys
"+"
and
"-"
(step 1 - step 6). Step numbers
are not shown on the display.
See the table below for user readout; if a key is
not operated during 5 minutes, the display
automatically returns to operational mode.
Use key "+" to “scroll” through the menu; press
key
"-"
to return to step 1. in this situation no
settings can be modified.
7.3 Reading out settings by
the installer
A more comprehensive readout programme is
available for the installer. All installer data can
be viewed after pressing keys
"F"
and
"OK"
within 3 seconds. in this menu the values
cannot be modified.
Activating this menu always calls up step no. 7.
See the table below for user readout.
Pressing key
"+"
calls up the installer and user
data and pressing key
"-"
takes you back to
step no. 1.
After 5 minutes this menu automatically
disappears and the display will show the
operational situation again.
In the event of an error, the error code appears
on the display. Refer to page 18 for further
information.
