Toshiba MMU-AP0072H2UL-1 Service Manual

Also see for Carrier MMC-AP0181H2UL: Service manual Installation manual Service manual Engineering data book

Contents

4Check ground wires.Prohibition of modification.Use specified parts.Do not bring a childclose to the equipment.Insulating measuresNo fireRefrigerantAssembly/CablingBefore troubleshooting or repair work, check the ground wire is connected to the groundterminals of the main unit, otherwise an electric shock is caused when a leak occurs.If the ground wire is not correctly connected, contact an electric engineer for rework.Do not modify the products.Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury.For spare parts, use those specified (∗∗∗∗∗).If unspecified parts are used, a fire or electric shock may be caused.∗: For details, refer to the parts list.Before troubleshooting or repair work, do not bring a third party (a child, etc.) exceptthe repair engineers close to the equipment.It causes an injury with tools or disassembled parts.Please inform the users so that the third party (a child, etc.) does not approach the equipment.Connect the cut-off lead wires with crimp contact, etc, put the closed end side upwardand then apply a water-cut method, otherwise a leak or production of fire is caused atthe users’ side.When repairing the refrigerating cycle, take the following measures.1) Be attentive to fire around the cycle. When using a gas stove, etc, be sure to put out firebefore work; otherwise the oil mixed with refrigerant gas may catch fire.2) Do not use a welder in the closed room.When using it without ventilation, carbon monoxide poisoning may be caused.3) Do not bring inflammables close to the refrigerant cycle, otherwise fire of the welder maycatch the inflammables.Check the used refrigerant name and use tools and materials of the parts which match with it.For the products which use R410A refrigerant, the refrigerant name is indicated at a positionon the outdoor unit where is easy to see. To prevent miss-charging, the route of the serviceport is changed from one of the former R22.Do not useany refrigerant different from the onespecified for complement or replacement.Otherwise, abnormally high pressuremay be generated in the refrigeration cycle, which mayresult in a failure or explosion of the product or an injury to your body.For an air conditioner which uses R410A, never use other refrigerant than R410A.For an air conditioner which uses other refrigerant (R22, etc.), never use R410A.If different types of refrigerant are mixed, abnormal high pressure generates in therefrigerating cycle and an injury due to breakage may be caused.Do not charge refrigerant additionally.If charging refrigerant additionally when refrigerant gas leaks, the refrigerant composition inthe refrigerating cycle changes resulted in change of air conditioner characteristics orrefrigerant over the specified standard amount is charged and an abnormal high pressure isapplied to the inside of the refrigerating cycle resulted in cause of breakage or injury. Thereforeif the refrigerant gas leaks, recover the refrigerant in the air conditioner, execute vacuuming,and then newly recharge the specified amount of liquid refrigerant.In this time, never charge the refrigerant over the specified amount.When recharging the refrigerant in the refrigerating cycle, do not mix the refrigerant orair other than R410A into the specified refrigerant.If air or others is mixed with the refrigerant, abnormal high pressure generates in therefrigerating cycle resulted in cause of injury due to breakage.After installation work, check the refrigerant gas does not leak.If the refrigerant gas leaks in the room, poisonous gas generates when gas touches to firesuch as fan heater, stove or cocking stove though the refrigerant gas itself is innocuous.Never recover the refrigerant into the outdoor unit.When the equipment is moved or repaired, be sure to recover the refrigerant with recoveringdevice. The refrigerant cannot be recovered in the outdoor unit; otherwise a serious accidentsuch as breakage or injury is caused.After repair work, surely assemble the disassembled parts, and connect and lead theremoved wires as before. Perform the work so that the cabinet or panel does not catchthe inner wires.If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire iscaused at user’s side.WARNING