Service manual

25
<Auto vane drive>
(a) The auto vane is driven by a 2.5 rpm motor.
(b) Airflow direction can be selected between the No.1 and No.2 setting. (Initial setting is No.1)
(d) Airfiow direction is based on the horizontal position detected by the vane motor limit switch. When the horizontal posi-
tion can not be determined, the vane motor will remain ON until it is determined.
1 If the horizontal position still can not be detected, despite the 10minute detection, the vane motor will turn OFF.
Remote controller indication continues.
2 After, if the vane motor receives the “auto vane ON” command again, it will restart detecting the horizontal position.
If the horizontal position still can not be determined, despite the 10-minute detection, the vane motor will turn OFF.
(4) Detecting abnormalities in the outdoor unit
After the compressor has been continuously operated for 3 minutes, if the difference between the indoor coil temperature
and room temperature is out of RANGE C for 1 minute, the indoor fan speed will turn to LOW. Five minutes later, if the dif-
ference is still out of RANGE C,the outdoor unit is functioning abnormally. Thus, the compressor stops and check code
“P8” appears on remote controler.
RANGE A : Indoor coil temperature is more than 5 degrees above room temperature.
RANGE B : Indoor coil temperature is within 5 degrees either way of room temperature.
RANGE C : Indoor coil temperature is more than 5 degrees below room tempetature.
1
30°
2
45°
3
55°
4
70°
50Hz
Airflow direction change
Downward C → Horizontal 4→1
Rise
Horizontal → Downward A 1→2
2.4
Downward B → Downward C 3→4
2.3
Downward A → Downward B 2→3
1.3
(c) Vane motor drive time
Indoor coil temperature
minus room temperature
+5
0
-5
RANGE A
RANGE B
RANGE C
(degree)
(5) Drain pump control
The drain pump works in COOL or DRY operation. When operation stops or changes to HEAT mode, the drain pump con-
tinues to operate for 3 more minutes. The drain pump does not work in check mode.
<Drain sensor>
When both the drain pump and unit are operating, the drain sensor detects the temperature. This temperature tells
whether the drain water level is above or under the drain sensor. If the drain water level rises above the drain sensor due
to a drain pump malfunction, the unit will stop operating in order to prevent drain from overflowing. The check code “P5” on
the remote controller will display this occurrence. When both of the following conditions are satisfied, the drain sensor is
determined to be under water.
● Though the drain sensor has been heated by the drain sensor heater for more than 40 seconds, its temperature rise is
less than 20 degrees.
● The drain sensor temperature is below 63°C.
(6) Dew prevention heater
To prevent dew from accumulating on the grill, the dew prevention heater is continuously ON during COOL operation.
It is independant of the thermostat ON/OFF
Unit : sec