Dry Mode Operation; Fan Mode Operation; Auto Fan Speed - Technibel MCW1B5XAB Technical Data & Service Manual

4-4 Dry Mode Operation

Dry operation remove moisture from indoor air running, in cooling mode, at a low level without reducing the
ambient temperature. This is done cycling ON and OFF indoor and outdoor units according to below.
ROOM
TEMP
≥ SPT+2°C
< SPT+2°C
≥ SPT-1°C
< SPT-1°C
≥ 15°C
< 15°C
SPT = Set Point Temperature

4-5 Fan Mode Operation

With this mode, the indoor fan is turned on while cooling and heating valve stay off all the time. The user can
select between 3 speeds: HIGH, MEDIUM and LOW.

4-6 Auto Fan speed

With this option selected, the indoor fan speed changes automatically according to the difference between
the detected air temperature (RAT sensor) and the set point (SPT):
COOLING MODE
2 ≤ (RAT – SPT):
1 ≤ (RAT – SPT) < 2:
(RAT – SPT) < 1:
HEATING MODE
2 ≤ (SPT - RAT):
(SPT - RAT) < 2:
NOTE
SPT = Set Point Temperature
DRY LEVEL
Operation according to
LEVEL 0 COOLING mode
CM off
FMO on
LEVEL 1
FMI runs at LOW speed
RV off
CM off
FMO switches 3 minutes
LEVEL 2
on and 9 minutes off
FMI switches LL and L
during FMO operation
RV off
CM off
FMO off
DRY OFF ZONE
FMI off
RV off
HIGH speed
MEDIUM speed
LOW speed
HIGH speed
MEDIUM speed
JP4 OPEN
Operation according to
COOLING mode
CM off
FMO off
FMI runs at LOW speed
RV off
CM off
FMO off
FMI switches LL and L
(3 MIN. on and 9 OFF)
RV off
CM off
FMO off
FMI off
RV off
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