Remote Controller; Changeover Switch: Name And Function Of Each Switch; Operation Range; Operation Procedure - Daikin ERQ Service Manual

4. R
EMOTE CONTROLLER
Refer to the operation manual of the remote controller.
5. C
HANGEOVER SWITCH
FUNCTION OF EACH SWITCH
1 FAN ONLY/AIR CONDITIONING SELECTOR SWITCH
Set the switch to for fan only operation or to
cooling operation.
2 COOL/HEAT CHANGEOVER SWITCH
Set the switch to for cooling or to
6. O
PERATION RANGE

Operation range

Use the system in the following temperature and humidity ranges for
safe and effective operation.
ERQ125~250_W1
–5~43°C DB –20~21°C DB
Outdoor
temperature
–20~15.5°C WB
21~32°C DB 15~27°C DB
Indoor
temperature
14~25°C WB
Indoor
≤
(†)
80%
humidity
(*) Range for operation: –20~–15°C WB. Range for continuous operation:
–15~15.5°C WB.
(†) 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.
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 143.
■
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

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.
Cooling operation
Heating operation
Fan only operation
2 Press the on/off button.
The operation lamp lights up and the system starts operation.
Operation manual
144
: N
AME AND
(See figure 3)
for heating or
for heating operation.
ERQ100~140_V1
(*)
–5~46°C DB –20~24°C DB
–20~15.5°C WB
21~32°C DB 15~27°C DB
14~25°C WB
≤ (†)
80%
(See
For systems with cool/heat changeover remote control switch
1 Select operation mode with the cool/heat changeover remote
control switch as follows:
Cooling operation (figure 6)
Heating operation (figure 7)
Fan only operation (figure 8)
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 swith 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.
Do not turn off power immediately after the unit stops,
NOTE
but wait for at least 5 minutes.
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.
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ERQ100~140A7V1B + ERQ125~250A7W1B
Inverter condensing unit
4PW51322-1