Service manual

29
(1) Compressor control
13-minute time delay
To prevent overload, the compressor will not start within 3 minutes after stop.
2The compressor runs when the room temperature is lower than the set temperature.
The compressor stops when the room temperature is equal to or higher than the set temperature.
3The compressor stops in check mode or during protective functions.
4Overheat protection
<Start condition>
When the indoor coil thermistor reads 70°C or above, the overheat protection will start.
<Overheat protection>
The compressor stops for 6 minutes, and then restarts.
If the start condition is satisfied again within 10 minutes of compressor operation, both the indoor and outdoor units stop,
displaying a check code of “P6” on the remote controller.
<Termination conditions>
Overheat protection is terminated when the start condition is not satisfied again during the allowance (10-minute compres-
sor operation), when operation mode changes to other mode, or when thermostat turns OFF.
(2) Indoor fan control
(a) Normal control
( i )The indoor fan runs on EXTRA-LOW speed during the thermostat OFF.
EXTRA-LOW speed can be changed to LOW or HIGH speed by setting the dipswitch SW1-7 and SW1-8, If the
indoor coil temperature becomes more than 5 degrees below the room temperature during the thermostat OFF, the
indoor fan will stop. After, when the indoor coil temperature becomes within 5 degrees of room temperature, the
indoor fan will run on EXTRA-LOW speed.
( ii)Hot adjustment
Hot adjustment is a warm-up for HEAT operation
<Start conditions>
The hot adjustment works under any of the follwing conditions.
● HEAT operation starts.
● Defrosting ends.
● Thermostat turns ON.
<Hot adjustment>
Initially, the indoor fan runs on EXTRA-LOW speed. When 5 minutes have passed or the indoor coil temperature
exceeds 35°C, the fan speed changes to LOW. Two minutes later, the hot adjustment ends. Then, the fan speed
depends on the remote controller setting.
(iii)The indoor fan stops when the indoor coil temperature is within 5 degrees either way of room temperature.
(iv)To eliminate the remaining heat, the indoor fan runs for the first 1 minute after the booster heater is turned OFF.
(3) Auto vane control
(a) STOP mode (fixed operation)
( i ) The airflow direction at the start-up of HEAT operation is the same as that of the previous operation.
( ii ) The airflow direction can be charged by the remote controller setting.
In the following cases, air flow direction becomes 30° regardless of the remote controller setting.
1 During the hot adjustment with fan speed at EXTRA-LOW
2 During defrosting within door fan OFF
3 During the thermostat OFF
(b) SWING mode
( i ) The vane motor turns ON when the SWING mode is selected.
The vane motor is continuously ON during SWING mode.
( ii ) In the following cases, the air flow direction is 30 regardless of the remote controller setting.
1 During the hot adjustment with fan speed at EXTRA-LOW
2 During defrosting with indoor fan OFF
3 During thermostat OFF
30°
45° 55°
70°
SWING
(SW5-3 : OFF/ON)