1. Safety precautions
Ź
Read and observe the safety precautions below and the instructions provided on the labels affixed to the
unit.
Ź
Retain this manual for future reference. Make sure that this manual is passed on to the end users.
Ź
All refrigerant piping work, electrical work, air-tightness test, and brazing work must be performed by
qualified personnel.
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Incorrect use may result in serious injury.
: indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
: indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
: addresses practices not related to personal injury, such as product and/or
property damage.
1-1. General precautions
Do not use any refrigerant other than the type indicated in the manuals for the unit and on the nameplate.
- Doing so will cause the unit or pipes to burst, or result in an explosion or fire during use, during repairs, or at the
time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from
the use of the wrong type of refrigerant.
Do not use the unit in an unusual environment.
- If the unit is used in areas exposed to large amounts of oil, steam, organic solvents, or corrosive gases (such as
ammonia, sulfuric compounds, or acids), or areas where acidic/alkaline solutions or special chemical sprays are
used frequently, it may significantly reduce the performance and corrode the internal parts, resulting in refrigerant
leakage, water leakage, injury, electric shock, malfunction, smoke, or fire.
Do not change the settings of the safety or protection devices.
- Forcing the unit to operate by disabling the safety devices, such as the pressure switch or the thermal switch, may
result in bursting, fire, or explosion.
- Operating the unit with a safety device whose settings have been changed may result in bursting, fire, or explosion.
- Using safety devices other than those specified by Mitsubishi Electric may result in bursting, fire, or explosion.
Do not alter or modify the unit.
- Doing so will result in refrigerant leakage, water leakage, serious injury, electric shock, or fire.
Do not wet the electrical parts.
- Doing so may result in current leakage, electric shock, malfunction, or fire.
Do not touch the electrical parts, switches, or buttons with wet fingers.
- Doing so may result in electric shock, malfunction, or fire.
Do not touch the refrigerant pipes and refrigerant line components with bare hands during and immediately
after operation.
- The refrigerant in the pipes will be very hot or very cold, resulting in frostbite or burns.
Do not touch the electrical parts with bare hands during and immediately after operation.
- Doing so may result in burns.
Ventilate the room while servicing the unit.
- If the refrigerant leaks, oxygen deficiency may result. If the leaked refrigerant comes in contact with a heat source,
toxic gas will be generated.
GB-2
WT07828X01
