Service manual

ESIE03–01 Overview of the heating mode functions
Part 2 – Functional Description 2–43
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3.3 Draft Avoidance Control 1
Applicable units The draft avoidance control 1 is applicable for the following units:
Purpose The purpose of the draft avoidance control 1 is to avoid draft, which is very uncomfortable for the end
users.
Method The draft avoidance control 1 delays the moving of the flap setting to the Po0 position (= upper) for a
certain amount of time in the following conditions:
P In heating mode and thermostat OFF, or
P In defrosting.
Heating mode and
thermostat OFF
The time chart below illustrates the draft avoidance control 1 in heating mode and thermostat OFF.
Defrosting The time chart below illustrates the draft avoidance control 1 in defrosting.
Model type Model name
Cassette FHYCP and FUYP
Corner FHYKP
Ceiling FUYP
Wall FAYP
When the flap starts to move, there can be
a draft. The fan speed decreases to LL
speed but it takes some time because of
its inertia.
F
an
F
lap
T
hermostat
Setting
LL
Setting
Po0
ON
OFF
Flap motor starts
to drive the flap.
20 s
Flap moves from
setting position to Po0
Po0
When the flap starts to move, there can be
a draft. The fan speed decreases to LL
speed but it takes some time because of
its inertia.
F
an
F
lap
D
efrosting
Setting
Off
Setting
Po0
Yes
No
Flap motor starts
to drive the flap.
20 s
Flap moves from
setting position to Po0
Po0