01-04
1-4. AUTO CHANGEOVER OPERATION
When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum
mode from among the HEATING, COOLING, DRY and MONITORING modes. During operation,
the optimum mode is automatically swiched in accordance with temperature changes.
The temperature can be set between 18
°
C and 30
°
C in 1
deg
C steps.
When operation starts, only the indoor and outdoor fans are operated for 1 minute.
After 1 minute, the room temperature and outdoor air temperature are sensed and
the operation mode is selected in accordance with the table below.
( Table 4 : Operation mode selection table )
1
Room temperature :Tb
Outdoor temperature :To
Tb > Ts +2
deg
C
Ts +2 degC > Tb
=
=
Ts +2 degC > Tb > Ts-2 degC
Cooling
(Automatic Dry)
Cooling
(Automatic Dry)
Monitoring
Monitoring
Monitoring
Monitoring
Monitoring
Heating
Heating
Ts : Setting temperature
A zone
B zone
C zone
A zone
B zone
C zone
32
°
C
-10
°
C
When COOLING was selected at , the air conditioner operates as follow:
The same operation as COOLING OPERATION of item 5-1 above is performed.
However, the setting temperature is raised 1
degC
and the room temperature correct coefficient value is 0
°
C
When the compressor frequency have been below 20Hz for 8 minutes or the room temperature reaches
"setting temperature -1.5
°
C" , operation is automatically switched to DRY OPERATION of item 5-3 above
is performed.
However, compressor control based on room temperature is as follows.
If the room temperature reaches "setting tempe2
°
C" during DRY operation,
operation returns to COOLING operation.
When HEATING was selected at , the same operation as HEATING OPERATION of item 5-2
above is performed. However, the room temperature correct coefficient value is 0
°
C.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the COOLING or HEATING operation mode was selected at above, operation is switched
to MONITORING and the operation mode is selected again.
1
2
3
1
4
1
( Fig.5 : Outdoor air temperature zone selection )
Room
temperature
Compressor :ON
Compressor :OFF
Ts -0.5
°
C
Ts -1.5
°
C
