Daikin ERQ100A7V1B, Operation Manual

ERQ100~14 ERQ125~250A7W1B
Inverter condensing unit
4PW51322-1B – 2018.04

Operation manual

3

4.

R

EMOTE

CONTROLLER

Refer to the operation manual of the remote controller.

5.

C

HANGEOVER

SWITCH

: N

AME

AND

FUNCTION

OF

EACH

SWITCH

(See figure 3)

1

FAN ONLY/AIR CONDITIONING SELECTOR SWITCH
Set the switch to 

 for fan only operation or to 

 for heating or

cooling operation.

2

COOL/HEAT CHANGEOVER SWITCH
Set the switch to 

 for cooling or to 

 for heating operation.

6.

O

PERATION

RANGE

Operation range

Use the system in the following temperature and humidity ranges for
safe and effective operation.

7.

O

PERATION

PROCEDURE

■

Operation procedure varies according to the combination of
outdoor unit and remote controller. Read 

"3. What to do before

operation" on page 2

.

■

To protect the unit, turn on the main power switch 6 hours before
operation.

■

If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.

■

Refer to the manual supplied with the control box for operation
and functionality.

■

Refer to the manual supplied with the remote controller for
operation and functionality.

7.1.

Cooling, heating, and fan only operation 

(See

figure 4

 and 

figure 6

)

The fan may keep on running for a while after the heating operation
stops.

For systems with Daikin remote controller and without cool/
heat changeover remote control switch 

(See figure 4)

1

Press the operation mode selector button several times and
select the operation mode of your choice.

2

Press the on/off button.
The operation lamp lights up and the system starts operation.

For systems with cool/heat changeover remote control switch

1

Select operation mode with the cool/heat changeover remote
control switch as follows:

2

Press the on/off button or close T1/T2.
The operation lamp lights up and the system starts operation.

For systems without Daikin remote controller, without cool/
heat changeover remote control switch and with a field 
supplied controller

1

Select operation mode with the field supplied controller.

2

Close T1/T2.
The operation lamp lights up and the system starts operation.

Adjustment

For programming temperature refer to the operation manual of the
remote controller.

Stopping the system

3

Press the on/off button once again or open T1/T2.
The operation lamp goes off and the system stops operation.

Explanation of heating operation

It may take longer to reach the set temperature for general heating
operation than for cooling operation.

The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.

Defrost operation

■

In heating operation, freezing of the outdoor unit coil increases.
Heating capability decreases and the system goes into defrost
operation.

■

The air handling unit fan stops and the remote controller
displays .

■

In case no remote controller is installed, a defrost signal is
outputted from the control box.

■

After maximum 10 minutes of defrost operation, the system
returns to heating operation again.

Hot start

In order to prevent cold air from blowing out of an air handling unit at
the start of heating operation, the air handling unit fan can be
stopped, depending on the control of the air handling unit.

In case a remote controller is installed, the remote controller displays

. It may take some time before the fan starts. This is not a

malfunction.

ERQ125~250_W1

ERQ100~140_V1

Outdoor 
temperature

–5~43°C DB

–20~21°C DB

–5~46°C DB –20~24°C DB

(*)

(*) Range for operation: –20~–15°C WB. Range for continuous operation: 

–15~15.5°C WB.

–20~15.5°C WB

–20~15.5°C WB

Indoor 
temperature

21~32°C DB

15~27°C DB

21~32°C DB

15~27°C DB

14~25°C WB

14~25°C WB

Indoor 
humidity

≤

80%

(†)

(†) to avoid condensation and water dripping out the unit.

If the temperature or the humidity is beyond these conditions, safety devices may 
work and the air conditioner may not operate.

≤

80%

(†)

Cooling operation

Heating operation

Fan only operation

Cooling operation (

figure 6

)

Heating operation (

figure 7

)

Fan only operation (

figure 8

)

NOTE

Do not turn off power immediately after the unit stops,
but wait for at least 5 minutes.

4PWEN51322-1B_2018_04.book  Page 3  Thursday, June 7, 2018  9:42 PM