Daikin LRYEQ-AY - Инструкция по эксплуатации - Страница 22

Installation manual

19

LRYEQ16A7Y1

CONVENI-PACK

4P448939-1A – 2016.07

*1 The cylinder’s internal pressure will drop when there is little refrig-

erant remaining in the cylinder, making it impossible to charge the 
unit, even if the liquid shutoff valve opening is adjusted. In this sit-
uation, replace the cylinder with one that has more refrigerant 
remaining.
Additionally, if the piping length is long, replenishing while the liquid 
shutoff valve is fully closed may lead to activation of the protection 
system, causing the unit to stop operation.

1. After the work is completed, apply a screw lock agent (for flare 

nuts) to the screws of the shutoff valves and service ports.
Refer to the "Handling Precautions for Valve Cover" and "Handling 
Precautions for Service Port" in "6-6 Connecting the Refrigerant 
Piping" for the handling of the valve covers and service ports.

2. After the refrigerant replenishment is completed, fill out the item 

"total amount of refrigerant replenishment". Refer to page 18 of this 
manual.

[Precautions for refrigerant cylinder]
At the time of refrigerant filling, check whether the siphon tube is pro-
vided. Then locate the cylinder so that the refrigerant will be filled in 
the state of liquid (see table below).
R410A is a mixed refrigerant, the composition of which may change 
and the normal operation of the system may not be possible if the 
refrigerant is filled in the state of gas.

[Check through sight glass]

CAUTION

• Fully open the shutoff valves on the liquid and gas sides after 

the refrigerant replenishment is finished.
The compressor will malfunction if the system is operated with the 
shutoff valves closed.

• Apply a screw lock agent to the screws of the valve cover 

mounting parts and service ports.
(Otherwise, dew condensation water will intrude and freeze inside 
and cause cap deformation or damage, which may result in refrig-
erant gas leakage or compressor malfunctions.)

CAUTION

When the refrigerant charging procedure is done or when pausing, 
close the valve of the refrigerant tank immediately, remaining pressure 
might charge additional refrigerant. Possible concequence: Incor-
rect refrigerant amount.

12. TEST RUN

For test run operators

Do not operate the outdoor unit alone on a trial basis.
When you connect a booster unit, refer to the installation manual 
attached to the booster unit before a test run.

Test run procedure
Use the following procedure to perform a test run after installation 
work is complete for the entire system:

1.

Fully open the shutoff valves on the gas and liquid side of the out-
door unit.

2.

Check that the electric accessory box lids of the outdoor unit, the 
indoor unit (air-conditioner, refrigeration showcase, refrigeration 
unit cooler) and the piping cover of the outdoor unit are closed. 
Then turn on the outdoor and indoor units (air conditioner, refriger-
ation showcase, refrigeration unit cooler).

3.

Turn on the operation switch from the inspection door of the out-
door unit. (The outdoor fan rotates in about 10 minutes after the 
operation switch is turned on and the compressor starts.)

4.

Push the ON/OFF button on the remote controller of the outdoor 
unit (air-conditioner) to operate the unit.

5.

Check the sealing condition through the sight glass of the outdoor 
unit. In case of shortage of refrigerant, check if the refrigerant is 
charged to the specified level.

6.

Check the following on each unit.

7.

Be sure to turn off the operation switch before turning off the power.

Error diagnosis

• Check the following if nothing is displayed on the remote controller 

during the test run.

<Indoor unit (air-conditioner)>
1. Is the power turned on?
2. Is the wire broken or incorrectly wired (between the power, the 

indoor unit and the remote controller)?

3. Has the fuse on PCB melted?

• Take the following action if you find a malfunction code on the 

remote controller during the test run.

Cylinder provided with siphon tube.

Other cylinders

Stand the cylinder upright and fill the refrigerant.
(There is a siphon tube inside, which makes it 
possible to replenish the refrigerant in the state of 
liquid without setting the cylinder upside down.)

Stand the cylinder upside down and fill the 
refrigerant.
(Pay attention so that the cylinder will not topple 
down.)

Full of liquid

A little foam 
flows.

Sealing state

Foam always 
comes out.

Refrigerant insufficiency

Sight glass

Refrigeration showcase

Cold air should be blowing and the tempera-
ture should decrease to the preset level.
The electronic expansion valve should be 
controlled on an appropriate superheated 
degree.
The unit should start defrosting operation by 
the time set on the timer.

Refrigeration unit cooler

Cold air should be blowing and the tempera-
ture should decrease to the preset level.
The electronic expansion valve should be 
controlled on an appropriate superheated 
degree.
The unit should start defrosting operation by 
the time set on the timer.

Air-conditioner

Cold air (or hot air) should be blowing.

Malfunction 
code

Defect at installation

Action to be taken

E3, E4

Shutoff valves closed

Fully open the shutoff 
valves.

L4

The air passage is blocked.

Remove obstacles blocking 
the air passage.

U1

Reverse-phase of the power 
supply

Exchange two wires out of 
three power supply wires.

U2

Voltage drop

Check the voltage drop.

U4, UF

Wrong wiring of transmis-
sion lines between units

Check the connection of 
transmission lines between 
the outdoor unit and the air 
conditioner.

UA

In the case of system dis-
crepancy

Check if the air conditioner is 
connected as should be 
assembled.

E2

Electric leak

See *1.

4PEN448939-1A.book  Page 19  Monday, September 5, 2016  7:12 PM