Daikin FCQ35B7V1, Service Manual

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Functional concept ESIE05-04
2–20 Part 2 – Functional Description
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1.15 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 thermostat
OFF The time chart below illustrates the draft avoidance control 1 in heating 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:
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.
Fan
Flap
Thermostat
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.
Fan
Flap
Defrosting
Setting
Off
Setting
Po0
Yes
No
Flap motor starts
to drive the flap.
20 s
Flap moves from
setting position to Po0
Po0
Input
Connection on
indoor PCB Connection on
outdoor PCB
Limit switch for flap 33S —
No. of fan turns X26A —
Outdoor heat exchanger thermistor (defrost control) — R2T