Toshiba MMW-AP0271LQ-E Service Manual page 9

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 hot water module 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.
Check after
After repair work (installation of front panel and cabinet) has finished, execute a test run to check there is no
repair
generation of smoke or abnormal sound.
If check is not executed, a fire or an electric shock is caused. 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.
Do not operate
Running the compressor under condition that the valve closes causes an abnormal high pressure resulted in
the unit with the
damage of the parts of the compressor and etc. and moreover if there is leak of refrigerant at connecting section
valve closed.
of pipes, the air is sucked and causes further abnormal high pressure resulted in burst or injury.
Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the hot water module. It is
dangerous for the hot water module 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.
2) The power cord is not caught in the product.
Check after
3) There is no inclination or unsteadiness and the installation is stable.
reinstallation
If check is not executed, a fire, an electric shock or an injury is caused.
When carrying out the pump-down work shut down the compressor before disconnecting the refrigerant pipe.
Disconnecting the refrigerant pipe with the service valve left open and the compressor still operating will cause
air, etc. to be sucked in, raising the pressure inside the refrigeration cycle to an abnormally high level, and
possibly resulting in reputing, injury, etc.
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 hot water module 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-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 electric shock and
Cooling check
heat.
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 hot water module 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.
Only a qualified installer (*1) or qualified service person (*1) is allowed to install the hot water module. If the hot
water module is installed by an unqualified individual, a fire, electric shocks, injury, water leakage, noise and / or
vibration may result.
Before starting to install the hot water module, read carefully through the Installation Manual, and follow its
instructions to install the hot water module.
Be sure to use the company-specified products for the separately purchased parts. Use of non-specified
products may result in fire, electric shock, water leakage or other failure. Have the installation performed by a
qualified installer.
Do not supply power from the power terminal block equipped on the outdoor unit to another outdoor unit.
Capacity overflow may occur on the terminal block and may result in fire.
Do not install the hot water module in a location that may be subject to a risk of expire to a combustible gas.
Installation
If a combustible gas leaks and becomes concentrated around the unit, a fire may occur.
Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the local
regulations and laws.
Install the circuit breaker where it can be easily accessed by the qualified service person (*1).
If you install the unit in a small room, take appropriate measures to prevent the refrigerant from exceeding the
limit concentration even if it leaks. Consult the dealer from whom you purchased the hot water module when you
implement the measures. Accumulation of highly concentrated refrigerant may cause an oxygen deficiency
accident.
Do not place any combustion appliance in a place where it is directly exposed to the wind of hot water module,
otherwise it may cause imperfect combustion.
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