Mitsubishi HMA100V Technical Manual page 5

l Do not open the service valves for liquid line and gas line until completed refrigerant piping work, air tightness test and
evacuation.
If the compressor is operated in state of opening service valves before completed connection of refrigerant piping work, air can
be sucked into refrigerant circuit, which can cause bust or personal injury due to anomalously high pressure in the refrigerant.
l Do not put the drainage pipe directly into drainage channels where poisonous gases such as sulphide gas can occur.
Poisonous gases will flow into the room through drainage pipe and seriously affect the user's health and safety
l Only use prescribed optional parts. The installation must be carried out by the qualified installer.
If you install the system by yourself, it can cause serious trouble such as water leaks, electric shocks, fire.
l Do not run the unit with removed panels or protections.
Touching rotating equipments, hot surfaces or high voltage parts can cause personal injury due to entrapment, burn or electric
shocks.
l Be sure to fix up the service panels.
Incorrect fixing can cause electric shocks or fire due to intrusion of dust or water.
l Do not perform any repairs or modifications by yourself. Consult the dealer if the unit requires repair.
If you repair or modify the unit, it can cause water leaks, electric shocks or fire.
l Do not perform any change of protective device itself or its setup condition.
The forced operation by short-circuiting protective device of pressure switch and temperature controller or the use of non
specified component can cause fire or burst.
l Be sure to switch off the power supply in the event of installation, inspection or servicing.
If the power supply is not shut off, there is a risk of electric shocks, unit failure or personal injury due to the unexpected start
of fan.
l Consult the dealer or an expert regarding removal of the unit.
Incorrect installation can cause water leaks, electric shocks or fire.
l Stop the compressor before disconnecting refrigerant pipes in case of pump down operation.
If disconnecting refrigerant pipes in state of opening service valves before compressor stopping, air can be sucked, which can
cause burst or personal injury due to anomalously high pressure in the refrigerant circuit.
l Carry out the electrical work for ground lead with care.
Do not connect the ground lead to the gas line, water line, lightning conductor or telephone line's ground lead. Incorrect
grounding can cause unit faults such as electric shocks due to short-circuiting.
l Use the circuit breaker with sufficient breaking capacity.
If the breaker does not have sufficient breaking capacity, it can cause the unit malfunction and fire.
l Earth leakage breaker must be installed.
If the earth leakage breaker is not installed, it can cause electric shocks.
l Do not use any materials other than a fuse with the correct rating in the location where fuses are to be used.
Connecting the circuit with copper wire or other metal thread can cause unit failure and fire.
l Do not install the unit near the location where leakage of combustible gases can occur.
If leaked gases accumulate around the unit, it can cause fire.
l Do not install the unit where corrosive gas (such as sulfurous acid gas etc.) or combustible gas (such as thinner and
petroleum gases) can accumulate or collect, or where volatile combustible substances are handled.
Corrosive gas can cause corrosion of heat exchanger, breakage of plastic parts and etc. And combustible gas can cause fire.
l Secure a space for installation, inspection and maintenance specified in the manual.
Insufficient space can result in accident such as personal injury due to falling from the installation place.
l When the outdoor unit is installed on a roof or a high place, provide permanent ladders and handrails along the access
route and fences and handrails around the outdoor unit.
If safety facilities are not provided, it can cause personal injury due to falling from the installation place.
l Do not use the indoor unit at the place where water splashes may occur such as in laundries.
Since the indoor unit is not waterproof, it can cause electric shocks and fire.
l Do not install nor use the system close to the equipment that generates electromagnetic fields or high frequency
harmonics.
Equipment such as inverters, standby generators, medical high frequency equipments and telecommunication equipments can
affect the system, and cause malfunctions and breakdowns. The system can also affect medical equipment and
telecommunication equipment, and obstruct its function or cause jamming.
l Do not install the outdoor unit in a location where insects and small animals can inhabit.
Insects and small animals can enter the electric parts and cause damage or fire. Instruct the user to keep the surroundings
l Do not use the base flame for outdoor unit which is corroded or damaged due to long periods of operation.
Using an old and damage base flame can cause the unit falling down and cause personal injury.
l Do not install the unit in the locations listed below.
・Locations where carbon fiber, metal powder or any powder is floating.
・Locations where any substances that can affect the unit such as sulphide gas, chloride gas, acid and alkaline can occur.
・Vehicles and ships.
・Locations where cosmetic or special sprays are often used.
・Locations with direct exposure of oil mist and steam such as kitchen and machine plant.
・Locations where any machines which generate high frequency harmonics are used.
・Locations with salty atmospheres such as coastlines.
CAUTION
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'10 • HM-T-149