
– 10 –
Compulsion
When the refrigerant gas leaks, find out the leaked position and repair it surely.
If the leaked position cannot be found out and the repair work isinterrupted, pump-down and tighten the
service valve, otherwise the refrigerant gas may leak into the room.
When gas touchesto fire such as fan heater, stove or cooking stove, it may generate noxious gases,
causing afire though the refrigerant gas itself isinnocuous.
When installing equipment, which includesalarge amount of charged refrigerant in asub-room, it is
necessary that the concentration doesnot the limit even if the refrigerant leaks.
If the refrigerant leaksand exceedsthe limit concentration, an accident of shortage of oxygen iscaused.
Check after
repair
Do not
operate the
unit with the
valve closed.
Check after
reinstallation
Tighten the flare nut with atorque wrench in the specified manner.
Excessive tighten of the flare nut may cause acrack in the flare nut after along period, which may result in
refrigerant leakage.
Check that wiring will not be subject to wear, corrosion, excessive pressure, vibration, sharp edgesor any
other adverse environmental effects. The check shall also take into account the effectsof aging or continual
vibration from sourcessuch as compressorsor fans.
Nitrogen gas must be used for the airtight test.
The charge hose must be connected in such away that it isnot slack.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation isdone, atrouble of the refrigerating cycle, water leak, electric shock or fire iscaused.
Install the outdoor unit properly in alocation that isdurable enough to support the weight of the outdoor unit.
Insufficient durability may cause the outdoor unit to fall, which may result in injury.
After repair work has finished, check there isno trouble. If check isnot executed, afire, electric shock or
injury may be caused. For acheck, turn off the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute atest run to check there isno
generation of smoke or abnormal sound. If check isnot executed, afire or an electric shock iscaused.
Before test run, install the front panel and cabinet.
Check the following itemsafter reinstallation.
1) The earth wire iscorrectly connected.
2) The power cord isnot caught in the product.
3) There isno inclination or unsteadiness and the installation isstable.
If check isnot executed, afire, an electric shock or an injury iscaused.
Be sure to fix the screwsback which have been removed for installation or other purposes.
Once the repair work has been completed, check for refrigerant leaks, and check the insulation resistance
and water drainage. Then perform atrial run to check that the air conditioner isrunning properly.
Check the following mattersbefore atest run after repairing piping.
• Connect the pipessurely and there isno leak of refrigerant.
• The valve isopened.
Running the compressor under condition that the valve closescausesan abnormal high pressure resulted
in damage of the partsof the compressor and etc. and moreover if there isleak of refrigerant at connecting
section of pipes, the air issuctioned and causesfurther abnormal high pressure resulted in burst or injury.
Only aqualified installer (
∗
1) or qualified service person (
∗
1) isallowed to relocate the air conditioner.
It isdangerous for the air conditioner to be relocated by an unqualified individual since afire, electric shocks,
injury, water leakage, noise and/or vibration may result.
Assembly/
Wiring
After repair work, surely assemble the disassembled parts, and connect and lead the removed wiresas
before. Perform the work so that the cabinet or panel doesnot catch the inner wires.
If incorrect assembly or incorrect wire connection was done, adisaster such as aleak or fire iscaused at
user fsside.
Insulator
check
After the work has finished, be sure to use an insulation tester set (500VMΩ) to check the resistance is
1MΩor more between the charge section and the non-charge metal section (Earth position). If the
resistance value islow, adisaster such as aleak or electric shock iscaused at user fsside.
Ventilation
When the refrigerant gas leaksduring work, execute ventilation.
If the refrigerant gas comesin contact with afire, it may generate noxious gases, causing afire.
A closed room filled with leaked refrigerant gas isdangerous due to ashortage of oxygen.
Be sure to execute ventilation.
If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comesin contact with fire, it may generate noxious gases, causing afire.
(∗1) Refer to the “Definition of Qualified Installer or Qualified Service Person.”