To complete the installation, perform the following checks before the trial operation.
Strength of the installation site for both indoor and outdoor sides, confirm no obstruction of the unit air outlet
or return.
Tightness of Refrigerant piping connection and confirm no leakage
Electric wiring connections are correctly completed and unit has been grounding connected
Check the total length of the piping and record the volume of the additional charged refrigerant
The power supply should comply with the rated voltage of the air conditioner
Insulation of the pipe
Drainage
6.1 FINAL CHECK LIST
Set the air conditioning under the COOLING mode with the remote controller (or manual button) and check the
running status of both indoor unit and outdoor unit. In case of any malfunction, resolve it according to chapter
“Trouble shooting” in the “Service Manual”.
Indoor unit
Whether the buttons (such as ON/OFF, MODE, TEMPERATURE, FAN SPEED etc.) on the remote controller
work well.
Whether the louver moves normally.
Whether the room temperature is adjusted well.
Whether the indicator lights on the display panel are normal.
Whether the “manual” button works well.
Whether the drainage is normal.
Whether there is a vibration or abnormal noise during the operation.
Whether the indoor unit works well in COOLING or HEATING mode.
Outdoor unit
Whether there is a vibration or abnormal noise during the operation.
Whether the air flow, noise or condensate water generated by the air conditioner have disturb your
neighborhood.
Whether there is any refrigerant leakage.
6.3 TRAIL OPERATION
When restart the unit, there will be approximately 3 minutes delay for the
compressor to run for protection.
CAUTION
6.2 MANUAL OPERATION
Manual operation can be accessed by pressing manual button
Press the manual button repeatedly to change modes as follows:
Once = AUTO mode [heat, cool or fan, 24
°C and auto fan speed.
Twice = COOLING mode [switch to AUTO mode after 30 minutes (mainly used for trial operation)]
Three times = OFF
Manual Button
6. FINAL CHECK AND TRAIL OPERATION
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7.1 CHECKS TO THE AREA
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure
that the risk of ignition is minimised. For repair to the refrigerating system, the following precautions shall be
complied with prior to conducting work on the system.
7. INFORMATION SERVICING
7.2 WORK PROCEDURE
Works shall be undertaken under a controlled procedure so as to minimise the risk of a flammable gas or vapour
being present while the work is being performed.
7.3 GENERAL WORK AREA
All mintenance staff and others working in the local area shall be instructed on the nature of work being carried
out. work in confined spaces shall be avoided. The area around the work space shall be sectioned off. Ensure
that the conditions within the area have been made safe by control of flammable material.
7.4 CHECKING FOR PRESENCE OF REFRIGERANT
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the
technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being used
is suitable for use with flammable refrigerants, i.e. no sparking, adequately sealed or intrinsically safe.
7.5 PRESENCE OF FIRE EXTINGUISHER
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire
extinguishing equipment shall be available to hand. Have a dry power or CO2 fire extinguisher adjacent to the
charging area.
7.6 NO IGNITION SOURCES
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that
contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may
lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept
sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable
refrigerant can possibly be released to the surroungding space. Prior to work taking place, the area around the
equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. “NO SMOKING”
signs shall be displayed.
7.7 VENTILATED AREA
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or
conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The
ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
7.8 CHECKS TO THE REFRIGERATION EQUIPMENT
Where electrical components are being changed, they shall be fit for the purpose and to the correct
specification. At all times the manufacturer’s maintenance and service guidelines shall be followed. If in doubt
consult the manufacturer’s technical department for assistance. The following checks shall be applied to
installations using flammable refrigerants:
GB
