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Operation time chart
Example
OFF
Thermostat
Indoor fan
OFF
Outdoor fan
OFF
Compressor
4. Coil frost prevention
The operation is as same as coil frost prevention during COOL operation.(Refer to 11-1.3.)
However when coil frost prevention works while the indoor fan is OFF, its speed becomes set speed.
11-3. FAN (
) OPERATION
(1) Press OPERATE/STOP(ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select FAN mode with the OPERATION SELECT button.
(3) Select the desired fan speed. When AUTO, it becomes Low.
Only indoor fan operates.
Outdoor unit does not operate.
11-4. HEAT (
) OPERATION
(1) Press OPERATE/STOP(ON/OFF) button.
OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone.
(2) Select HEAT mode with the OPERATION SELECT button.
(3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature.
The setting range is 16 ~ 31°C.
1. Thermostat control
Thermostat is ON or OFF by difference between room temperature and set temperature.
Room temperature minus set temperature : less than -0.3 :··············································ON
Room temperature minus set temperature : 0.3 : or more·················································OFF
2. Indoor fan speed control
(1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.
In Auto the fan speed is as follows.
Set temperature minus room temperature: 1.7 degrees or more·············································· High
Set temperature minus room temperature: Between 1 and 1.7 degrees ·································· Med.
Set temperature minus room temperature: less than 1 degree················································· Low
(2) Cold air prevention control
1 When the compressor is not operating,
(1) if the temperature of indoor coil thermistor RT12 is 0°C or less, the fan stops.
(2) if the temperature of indoor coil thermistor RT12 is more than 0°C, the fan operates at Very Low.
2 When the compressor is operating,
(1) if the temperature of RT12 is 22°C or more, the fan operates at set speed.
(2) if the temperature of RT12 is less than 22°C and
(1) if the temperature of room temperature thermistor RT11 is 15°C or less, the fan stops.
(2) if the temperature of room temperature thermistor RT11 is more than 15°C, the fan operates at Very Low.
NOTE : If the temperature of RT12 reads from 18°C to 22°C at the air conditioner stating and also after defrosting,
this control works.
ON
ON
ON
OFF
ON
ON
OFF
8 min.
3 min.
<
MU-A07/A09/A12WV, MUX-A10/A19/A20/A25/A26WV
<
MUH-A07/A09/A12WV
Initial temperature difference
Initial temperature difference
Released
Cold Air Prevention
18: 22:
OFF
ON
OFF
ON
OFF
4 min.
1 min.
>
Fan speed
Set speed
Very Low or stop
86
ON
>
Difference between room
temperature and set tem-
perature during operation
Set temperature
Thermostat
-0.3 deg.
Difference between room
temperature and set tem-
Fan speed
perature during operation
1 deg. 1.7 deg.
0.3 deg.
3 deg.
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Troubleshooting
