Mitsubishi Mr.Slim MSZ-FE09NA Manuel de service télécharger pdf (Page 13)

8-3. HEAT (

) OPERATION

(1) Press OPERATE/STOP (ON/OFF) button.

POWER lamp (MSZ-FE09/12NA)/OPERATION INDICATOR lamp (MSZ-FE18NA) of the indoor unit turns on with a beep

tone.

(2) Select HEAT mode with OPERATION SELECT button.

(3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature.

The setting range is 61 ~ 88°F (16 ~ 31°C).

1. Cold air prevention control

When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room tem-

perature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed.

2. High pressure protection

The compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the con-

densing pressure from increasing excessively.

When the temperature of indoor heat exchanger becomes too high, the high pressure protection works.

The indoor fan operates following the cold air prevention control. This mode continues until the temperature of indoor heat

exchanger falls.

3. Defrosting

Defrosting starts when the temperature of outdoor heat exchanger becomes too low.

The compressor stops once, the indoor/outdoor fans stop, the 4-way valve reverses and the compressor re-starts.

This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes.

8-4. AUTO CHANGE OVER ··· AUTO MODE OPERATION

Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation.

Mode selection

(1) Initial mode

When unit starts the operation with AUTO operation from off:

• If the room temperature is higher than the set temperature, operation starts in COOL mode.

• If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode.

(2) Mode change

COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 2°F (1°C) below

the set temperature.

HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2°F (1°C) above

the set temperature.

NOTE1

If 2 or more indoor units are operating in multi system, there might be a case that the indoor unit, which is operating in

(AUTO), cannot change over to the other operating mode (COOL HEAT) and becomes a state of standby.

Refer to NOTE 2 "FOR MULTI SYSTEM AIR CONDITIONER".

NOTE 2

FOR MULTI SYSTEM AIR CONDITIONER

OUTDOOR UNIT: MXZ series

Multi system air conditioner can connect two or more indoor units with one outdoor unit.

• When you try to operate 2 or more indoor units with one outdoor unit simultaneously, one for the cooling and the

others for heating, the operation mode of the indoor unit that operates earlier is selected. Other indoor units can-

not operate, and operation indicator lamp flashes as shown in the figure below. In this case, please set all the

indoor units to the same operation mode

• When indoor unit starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max.

10 minutes) to blow out the warm air.

• In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant flow-

ing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it.

OPERATION INDICATOR

MSZ-FE09/12NA

L AREA R POWER

MSZ-FE18NA

Lighted

Blinking

Not lighted

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 43 44

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Mitsubishi Mr.Slim MSZ-FE09NA Manuel de service Page 13

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