Auto Changeover Operation - Fujitsu ARG60LHTA Service Instruction

1-4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum
mode from among the Heating, Cooling, Dry and Monitoring mode. During operation, the
optimum mode is automatically switched in accordance with temperature changes. The temperature
can be set between 18°C and 30°C in 1°C steps.
When operation starts, indoor fan is operated for around 2 minutes.
1
Room temperature and outdoor temperature are sensed, and the operation mode is selected
in accordance with the table below. <Monitoring mode>
( Table 4 : Operation mode selection table )
Room temperature (TR)
TR> Ts+2°C
Ts+2°C
*
If it's Middle zone, operation mode of indoor unit is selected as below.
(1). Same operation mode is selected as outdoor unit.
If outdoor unit is operating in Cooling, Dry, and Heating mode,
indoor unit will be operated by the same operation mode.
(2). Selected by the outdoor temperature.
If outdoor unit is operating in other than Cooling, Dry, and Heating mode, indoor unit will be operated
according to the outdoor temperature as below.
( Fig. 4 : Outdoor temperature zone selection )
25°C
2 When Cooling or Dry mode was selected at
The same operation as COOLING OPERATION AND DRY OPERATION of page 01-01 is performed.
When the room temperature has remained at set temperature -1.5°C, operation is automatically
switched to Dry mode.
If the room temperature reaches set temperature +2°C during Dry mode, operation returns to Cooling.
( Fig.5 : Auto changeover : Cooling - Dry )
( Air flow mode : Auto )
Ts +1°C
Ts -1.5°C
Ts -2.5°C
3 When Heating was selected at
01-02 is performed.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
4
after the Cooling(Auto:Dry) or Heating mode was selected at
to Monitoring and the operation mode is selected again.
AMP Air Conditioning
TR Ts -2°C
TR < Ts -2°C
Cooling mode
Heating mode
Cooling
Cooling
Dry(J zone)
Compressor stop
When the room
temperature drops
1 , the same operation as HEATING OPERATION of page
Operation mode
Cooling
(Automatic dry)
*
Middle zone
Heating
1 and air flow mode is Auto, the air conditioner operates as follow.
Ts +2°C
Dry(X zone)
Ts -0.5°C
Ts -1.5°C
When the room
temperature rises
1
above, operation is switched
01-04
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TR : Room temperature
Ts : Setting temperature
TR : Room temperature
Ts : Setting temperature