Daikin FXFQ20M8V3B Installation And Operation Manual Download

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FXFQ20~125M8V3B
VRV System air conditioners
4PW25082-1A

Installation and operation manual

For the remote controller wiring, refer to the "Installation manual
of the remote controller" supplied with the remote controller.

Never connect the power supply wiring to the terminal board for
transmission wiring. This mistake could damage the entire
system.

Use only specified wires and tightly connect wires to the
terminals. Be careful that wires do not place external stress on
the terminals. Keep wiring in neat order so that they do not
obstruct other equipment such as popping open the service
cover. Make sure the cover closes tight. Incomplete connections
could result in overheating, and in the worse case, electric shock
or fire.

IRING

EXAMPLE

■

Fit the power supply wiring of each unit with a switch and fuse as
shown in

figure 21

Complete system example (3 systems)

■

See figures

and

When using 1 remote controller for 1 indoor unit. (Normal
operation.)

(See figure 14)

For group control or use with 2 remote controllers

(See figure 16)

When including BS unit

(See figure 18)

Precautions

A single switch can be used to supply power to units on the same
system. However, branch switches and branch circuit breakers must
be selected carefully.

For a group control remote controller, choose the remote
controller that suits the indoor unit which has the most functions.

Do not ground the equipment on gas pipes, water pipes,
lightning rods or crossground with telephones. Improper
grounding could result in electric shock.

IELD

SETTING

Field setting must be made from the remote controller in accordance
with the installation condition.

■

Setting can be made by changing the "Mode number", "First
code No." and "Second code No.".

■

For setting and operation, refer to the "Field setting" in the
installation manual of the remote controller.

Summary of field settings

Power supply

Main switch

Power supply wiring

Transmission wiring

Switch

Fuse

BS unit REYQ only

Indoor unit

Remote controller

Outdoor unit

Indoor unit

Remote controller (Optional accessories)

Most downstream indoor unit

For use with 2 remote controllers

BS unit

NOTE

It is not necessary to designate indoor unit address
when using group control. The address is automati-
cally set when the power is activated.

Mode

No.

(Note 1)

First

code

No.

Description of setting

Second code No. (Note 2)

(20)

Filter contamination
- Heavy/Light
= Setting to define
time between 2 filter
cleaning display
indications. (When
contamination is
high, setting can be
changed to half the
time inbetween 2
filter cleaning
display indications.)

Ultra-
long-life
filter

Light

±10,000 hrs.

Hea

±5,000 hrs.

—

Long-life
filter

±2,500 hrs.

±1,250 hrs.

Standard
filter

±200 hrs.

±100 hrs.

Long-life filter type
Change the setting when ultra-
long-life filter is installed.
This setting is important for time
between 2 filter cleaning display
indications (refer to 10-0-0X).

Long-life filter

Ultra-long-life
filter

—

Thermostat sensor selection

Use both the
unit sensor (or
remote sensor if
installed) AND
the remote
controller
sensor.
(See note 5+6)

Use unit sensor
only (or remote
sensor if
installed).
(See note 5+6)

Use remote
controller
sensor only.
(See note 5+6)

—

Setting for display of time
between 2 filter cleaning display
indications

Display

Do not display

—

Information to I-manager,
I-touch controller

Only unit sensor
value (or remote
sensor value if
installed).

Sensor value as
set by 10-2-0X
or 10-6-0X.

—

Thermostat sensor in group
control

Use unit sensor
only (or remote
sensor if
installed).
(See note 6)

Use both the
unit senor (or
remote sensor if
installed) AND
the remote
controller
sensor. (See
note 4+5+6)

—

(22)

Output signal X1-X2 of the
optional KRP1B PCB kit

Thermostat-on +
compressor run

—

Operation

Mal-
function

ON/OFF input from outside
(T1/T2 input) = Setting when
forced ON/OFF is to be
operated from outside.

Forced OFF

ON/OFF
operation

—

Thermostat differential
changeover = Setting when
remote sensor is used.

1°C

0.5°C

—

Fan setting during thermostat
OFF at heating operation

Set speed

OFF
(See note 3)

—

Differential automatic
changeover

0°C

1°C

2°C

3°C
(See
note 7)

Auto-restart after power failure

Disabled

Enabled

—

Fixed cool/heat master

Disabled

Enabled

—

(23)

Setting for air outlet velocity
This setting is to be changed in
function of ceiling height.

≤

2.7 m

>2.7

≤

3.0 m

>3.0

≤

3.5 m

—

Selection for air flow direction
This setting is to be changed
when blocking pad optional kit
is used.

4-way flow

3-way flow

2-way flow

—

Airflow direction range setting
This setting is to be changed
when range of swing flap
movement needs to be
changed.

Upper

Normal

Lower

—

Setting for adjustment of fan
speed (phase control)

Standard

Option 1

Option 2

—

(25)

Drain pump ope
humidifier interlock

Equipped

Not equipped

—

Note 1 : Setting is carried out in the group mode, however, if the mode number inside parentheses is selected,

indoor units can also be set individually.

Note 2 : Factory settings of the Second code No. are marked in grey backgrounds.
Note 3 : Only use in combination with optional remote sensor or when setting 10-2-03 is used.
Note 4 : If group control is selected and remocon sensor is to be used, then set 10-6-02 & 10-2-03.
Note 5 : If setting 10-6-02 + 10-2-01 or 10-2-02 or 10-2-03 are set at the same time, then setting 10-2-01,

10-2-02 or 10-2-03 have priority.

Note 6 : If setting 10-6-01 + 10-2-01 or 10-2-02 or 10-2-03 are set at the same time, then setting for group

connection, 10-6-01 has priority and for individual connection, 10-2-01, 10-2-02 or 10-2-03 have
priority.

Note 7 : More settings for Differential automatic change over temperatures are:

Second code No.

4°C

5°C

6°C

7°C