Specifications
Installation and operation manual
36
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
Perform the test procedure as described in "15.4. Test operation" on
page 43.
B. Adding refrigerant by using the manual charging function
6B The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the manual refrigerant
charge operation mode:
Turn on the power of the indoor units and outdoor unit.
Take all the precautions mentioned in "start-up and
configuration" into account.
Activate outdoor unit setting [2-20]=1 to start manual
refrigerant charge mode. Refer to page 38 for details.
Result: The unit will start operation. Valve A can be opened.
Charging of remaining additional refrigerant can be done.
When the remaining calculated additional refrigerant amount
is added, close valve A and push BS3 to stop the manual
refrigerant charging procedure.
Perform the test procedure as described in "15.4. Test operation" on
page 43.
Information which may occur during additional refrigerant charging
procedures:
P8: Indoor unit freeze up prevention
Action: Close valve A immediately. Reset malfunction by pushing
BS1. Retry auto charge procedure.
P2: Abnormal low pressure drop
Action: Close valve A immediately. Reset malfunction by pushing
BS1. Check following items before retry auto charge procedure:
- Check if the gas side stop valve is opened correctly.
- Check if the valve of the refrigerant cylinder is opened.
- Check if the air inlet and outlet of the indoor units are not
obstructed.
E-2: Indoor temperature is out of range.
E-3: Outdoor temperature is out of range.
Other malfunction code: close valve A immediately. Confirm the
malfunction code and take corresponding action, "15.5. Malfunction
code list" on page 44.
14.4.3. Checks after adding refrigerant
Are the stop valves for liquid and gas open?
Is the amount of refrigerant, that has been added, recorded on
the refrigerant charge label?
15. Start-up and configuration
15.1. Checks before initial start up
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit must be closed, only then can
the unit be powered up.
1 Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
2 Field wiring
Be sure that the field wiring has been carried out according to
the instructions described in the chapter "12. Electrical wiring
work" on page 21, according to the wiring diagrams and
according to the applicable legislation.
3 Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
4 Earth wiring
Be sure that the earth wires have been connected properly and
that the earth terminals are tightened.
5 Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a voltage of
500 V DC between power terminals and earth. Never use the
megatester for the transmission wiring.
6 Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally installed
protection devices are of the size and type specified in the
chapter "12. Electrical wiring work" on page 21. Be sure that
neither a fuse nor a protection device has been bypassed.
7 Internal wiring
Visually check the electrical component box and the inside of the
unit on loose connections or damaged electrical components.
8 Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
9 Stop valves
Be sure that the stop valves are open on both liquid and gas
side.
10 Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
11 Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, try to repair the leak. If the repair is
unsuccessful, call your local dealer. Do not touch any refrigerant
which has leaked out from refrigerant piping connections. This
may result in frostbite.
12 Oil leak
Check the compressor for oil leakage. If there is an oil leak, try
to repair the leak. If the repairing is unsuccessful, call your local
dealer.
13 Air inlet/outlet
Check that the air inlet and outlet of the unit is not obstructed by
paper sheets, cardboard, or any other material.
INFORMATION
The manual refrigerant charge operation will automatically
stop within 30 minutes. If charging is not completed after
30 minutes, perform the additional refrigerant charging
operation again.
INFORMATION
When a malfunction is detected during the procedure
(e.g., in case of closed stop valve), a malfunction
code will be displayed. In that case, refer to
"15.5. Malfunction code list" on page 44 and solve the
malfunction accordingly. Resetting the malfunction
can be done by pushing BS3. The procedure can be
restarted from 6B).
Aborting the manual refrigerant charge is possible by
pushing BS3. The unit will stop and return to idle
condition.
NOTICE
Make sure to open all stop valves after (pre-) charging the
refrigerant.
Operating with the stop valves closed will damage the
compressor.
INFORMATION
It is important that all information in this chapter is read
sequentially by the installer and that the system is
configured as applicable.
DANGER: Electrical shock
See "2. General safety precautions" on page 2.