Draft Avoidance Control 1 - Daikin SkyAir Service Manual

Indoor Unit Functional Concept
2.4

Draft Avoidance Control 1

Purpose Avoid draft for the customer by delaying transfer of the flap to the Po0 (horizontal) position for a
certain amount of time when defrosting and in heating thermostat OFF.
Heating The time chart below illustrates the draft avoidance control 1 in heating thermostat OFF.
thermostat OFF
Defrosting The time chart below illustrates the draft avoidance control 1 in defrosting.
Used inputs The draft avoidance control 1 uses the following inputs:
Input
Limit switch for flap
No. of fan turns
Outdoor heat exchanger thermistor (defrost control)
56
Setting
Fan
LL
Setting
Flap
Po0
ON
Thermostat
OFF
Setting
Fan
Off
Setting
Flap
Po0
Yes
Defrosting
No
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.
Flap motor starts
20 s
to drive the flap.
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.
Flap motor starts
20 s
to drive the flap.
Connection on
indoor PCB
33S
X26A
—
SiBE28-804
Po0
Flap moves from
setting position to Po0
Po0
Flap moves from
setting position to Po0
Connection on
outdoor PCB
—
—
R2T
Functional Description