Toshiba RAS-M10U2MUVG-E Service Manual page 10

When the refrigerant gas leaks, find up the leaked position and repair it surely.
If the leaked position cannot be found up and the repair work is interrupted, pump-down and tighten the
service valve, otherwise the refrigerant gas may leak into the room.
When gas touches to fire such as fan heater, stove or cocking stove, it may generate noxious gases,
causing a fire though the refrigerant gas itself is innocuous.
When installing equipment which includes a large amount of charged refrigerant such as a multi air
conditioner in a sub-room, it is necessary that the density does not the limit even if the refrigerant leaks.
If the refrigerant leaks and exceeds the limit density, an accident of shortage of oxygen is caused.
Tighten the flare nut with a torque wrench in the specified manner.
Excessive tighten of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.
Compulsion
Nitrogen gas must be used for the airtight test.
The charge hose must be connected in such a way that it is not slack.
For the installation/moving/reinstallation work, follow to the Installation Manual.
If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused.
Install the outdoor unit properly in a location that is durable enough to support the weight of the outdoor unit.
Insufficient durability may cause the outdoor unit to fall, which may result in injury.
Once the repair work has been completed, check for refrigerant leaks, and check the insulation resistance
and water drainage. Then perform a trial run to check that the air conditioner is running properly.
After repair work has finished, check there is no trouble. If check is not executed, a fire, electric shock or
injury may be caused. For a check, turn off the power breaker.
After repair work (installation of front panel and cabinet) has finished, execute a test run to check there is no
Check after
generation of smoke or abnormal sound. If check is not executed, a fire or an electric shock is caused.
repair
Before test run, install the front panel and cabinet.
Be sure to fix the screws back which have been removed for installation or other purposes.
Check the following matters before a test run after repairing piping.
• Connect the pipes surely and there is no leak of refrigerant.
• The valve is opened.
Running the compressor under condition that the valve closes causes an abnormal high pressure resulted
in damage of the parts of the compressor and etc. and moreover if there is leak of refrigerant at connecting
Do not
operate the section of pipes, the air is suctioned and causes further abnormal high pressure resulted in burst or injury.
unit with the
valve closed.
Only a qualified installer (
It is dangerous for the air conditioner to be relocated by an unqualified individual since a fire, electric shocks,
injury, water leakage, noise and/or vibration may result.
Check the following items after reinstallation.
1) The earth wire is correctly connected.
Check after
2) The power cord is not caught in the product.
reinstallation
3) There is no inclination or unsteadiness and the installation is stable.
If check is not executed, a fire, an electric shock or an injury is caused.
When the service panel of the outdoor unit is to be opened in order for the compressor or the area around
this part to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to
the OFF position, and then wait at least 10 minutes before opening the service panel. If you fail to heed this
warning, you will run the risk of burning yourself because the compressor pipes and other parts will be very
hot to the touch. In addition, before proceeding with the repair work, wear the kind of insulated heat-
Cooling
resistant gloves designed to protect electricians.
check
When the service panel of the outdoor unit is to be opened in order for the fan motor, reactor, inverter or the
areas around these parts to be repaired immediately after the air conditioner has been shut down, set the
circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel.
If you fail to heed this warning, you will run the risk of burning yourself because the fan motor, reactor,
inverter heat sink and other parts will be very hot to the touch.
In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves
designed to protect electricians.
Take care not to get burned by compressor pipes or other parts when checking the cooling cycle while
running the unit as they get heated while running. Be sure to put on gloves providing protection for heat.
Cooling
∗
1) or qualified service person (
– 10 –
∗
1) is allowed to relocate the air conditioner.