2.2 U
SING THE
P
LATINUM
M
AIN
C
ONTROL
(
CONT
’
D
)
14
D
EHUMIDISTAT
O
VERRIDE
S
ELECTION
In the operating modes MIN, MAX, 20
MIN
/
H
and RECIRC, the user can select a
dehumidistat override so that if the relative humidity (RH) in the house exceeds the RH
setting previously stored, the ventilation unit will exchange in high speed until the
target indoor RH setting is reached.
An air exchanger is not a dehumidifier, but it can change the indoor relative humidity
by bringing in drier or more humid air from outside during non heating season. The
dehumidistat override function is useful to reduce indoor RH when the outdoor air is
cool and dry during the heating season. Select a target RH between 30% and 55%
according to your comfort. When outdoor relative humidity is high (e.g. in summer),
turn off the override by pressing OK until the RH display disappears.
When the dehumidistat override is activated, the AUTO indicator will
appear on LCD screen to show that the actual mode is being overridden.
Also, the relative humidity appears (if it was not shown, see example
beside). Once the target humidity level is reached, the unit goes back
into its original operating mode and AUTO disappears from LCD screen.
NOTE:
If the actual mode is MAX, only the relative humidity level appears on
screen; AUTO label will not appear.
To engage the dehumidistat override, press OK. The actual indoor RH and the %HUM
label appear on LCD screen.
NOTE:
If the actual RH is less than 20%, then the humidity indicator will display
“LO”, and if the actual RH is greater than 80%, then the humidity ndicator
will display “HI”.
To turn off the dehumidistat override, press OK again. The RH and %HUM display will
disappear from LCD screen.
P
OWER
F
AILURE
After a power failure, the wall control returns to its original operation mode. All settings
are kept in memory.
R
ESETTING
M
AINTENANCE
I
NDICATOR
: Press simultaneously on both arrow
buttons, Maintenance indicator will disappear from LCD screen.
AND
M
AINTENANCE
I
NDICATOR
The maintenance indicator is represented by an M in
a rounded triangle, at the top of the house (see
beside). If this indicator is flashing, perform the
semi-annual maintenance, and if it is not flashing,
perform the annual maintenance (refer to Section 3).
