Draft Avoidance Control 1 - Daikin FCQ35B7V1 Service Manual

Functional concept
1.15

Draft Avoidance Control 1

1
Purpose
Heating thermostat
2
OFF
3
4
Defrosting
5
Used inputs
2–20
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.
The time chart below illustrates the draft avoidance control 1 in heating thermostat OFF.
Setting
Fan
LL
Setting
Flap
Po0
ON
Thermostat
OFF
The time chart below illustrates the draft avoidance control 1 in defrosting.
Setting
Fan
Off
Setting
Flap
Po0
Yes
Defrosting
No
The draft avoidance control 1 uses the following inputs:
Input
Limit switch for flap
No. of fan turns
Outdoor heat exchanger thermistor (defrost control)
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
—
ESIE05-04
Po0
Flap moves from
setting position to Po0
Po0
Flap moves from
setting position to Po0
Connection on
outdoor PCB
—
—
R2T
Part 2 – Functional Description