Precautions For Relocating Or Repairing The Unit; Additional Precautions - Mitsubishi Electric City Multi PURY-HP-TNU-A Série Manuel D'installation

After the wiring work has been completed, measure the insulation resistance, and make sure that it reads at
- Failure to do so may result in electric leakage, malfunction, or fire.

1-6. Precautions for relocating or repairing the unit

Only qualified personnel must relocate or repair the unit. Do not attempt to disassemble or alter the unit.
- Failure to do so will result in refrigerant leakage, water leakage, serious injury, electric shock, or fire.
Do not service the unit in the rain.
- Doing so may result in electric leakage, electric shock, wire shorting, malfunction, smoke, or fire.

1-7. Additional precautions

Do not turn off the power immediately after stopping operation.
- Wait for at least five minutes after the unit has stopped before turning off the power. Failure to do so may result in
drain water leakage or the mechanical failure of sensitive parts.
The unit must be periodically inspected by a dealer or qualified personnel.
- If dust or dirt accumulates inside the unit, the drain pipes may become clogged, and water leakage from the pipes
may wet the surroundings and generate odours.
Turn on the power at least 12 hours before starting operation. Keep the power turned on throughout the
operating season.
- Insufficient energizing will result in malfunction.
Do not use the air conditioner for special purposes (e.g. keeping food, animals, plants, precision devices, or
art objects in a room).
- Such items could be damaged or deteriorated.
Collect the refrigerant and properly dispose of it in accordance with local regulations.
Do not install the unit on or over items that are subject to water damage.
- When the room humidity exceeds 80% or if the drain pipe is clogged, condensation may collect and drip from the
indoor unit onto the ceiling or floor.
Drain piping must be installed by a dealer or qualified personnel to ensure proper drainage.
- Improper drain piping may cause water leakage, resulting in damage to furniture and other surroundings.
Take appropriate measures against electrical noise interference when installing the unit in hospitals or radio
communication facilities.
- Inverter, high-frequency medical, or wireless communication equipment as well as power generators may cause the
air conditioning system to malfunction. The air conditioning system may also adversely affect the operation of these
types of equipment by creating electrical noise.
Insulate pipes to prevent condensation.
- Condensation may collect and drip from the unit onto the ceiling or floor.
Keep the service valves closed until refrigerant charging is completed.
- Failure to do so will damage the unit.
Place a wet towel on the service valves before brazing the pipes to keep the temperature of the valves from
rising above 120ºC (248ºF).
- Failure to do so may result in equipment damage.
Keep the flame out of contact with the cables and metal sheet when brazing the pipes.
- Failure to do so may result in burnout or malfunction.
WT09112X02 GB-5