Troubleshooting

About the Multiple Air-conditioner

Simultaneous Operation

•The air-conditioners cannot be in different operating modes at the same time, such as one unit being in the “Cool” mode and one unit being in the “Heat” mode.

•When conducting different operations, the air conditioner that was operated first will be given priority, so the air conditioner that is operated after that will conduct air blowing operation.

•When you want to give priority to the air conditioner that was started later, either stop the air conditioner that has priority or cause the operation type of the unit operated first to match that of the unit operated second.

Automatic Operation

•When the remote controller operation switch is in the “Auto” mode the air-conditioner automatically selects either “Cool,” “Dry,” or “Heat” when operation is started depending on the room temperature.

•During simultaneous operation of air-conditioner units, operation modes may be automatically changed in response to the temperatures of the individual rooms; this will result in the operation of the out-door unit being stopped. In such a case, COOL or HEAT mode should be used instead of AUTO. (This is only relevant when more than one air-conditioner unit is being used.)

Refrigerant (oil) recovery operation

•If the all of the indoor units are not operated at the same time for an extended period, the cooling or heating performance may temporarily decrease. This is in order to control the recovery of the refrigerant (oil) in the stopped indoor unit(s). At this time, the sound of refrigerant flowing may be heard from the stopped indoor unit(s).

Please carry out the following checks before making a service call.

The air conditioner does not work at all.

Has the power switch been	Has the timer been set in the	Is there a power failure or a
turned off?	"ON" position?	blown fuse?

Poor cooling or heating

Have you set the thermostat at a	Is the air filter clean? (Not	Did you leave any doors or
suitable temperature?	clogged?)	windows open?
suitable
temperature

If the air conditioner does not oper-

ate properly after you have checked the left points, or if any doubt still exists after you have consulted page 18, or if things happen as shown on page 19, switch off the power and contact your dealer.

Poor cooling

Is there any direct sunlight en- tering the room?

Is there a heat source in the room?

Are there too many people in the room?

A new refrigerant (R410A) is used in this air-conditioner. When asking the dealer for service or inspection and maintenance, explain the dealer about this matter.

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