Auto Changeover Operation - Fujitsu AS*9LSACW Service Instructions Manual

4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the AUTO mode by remote cintrol, operation starts in the optimum
mode from amoung 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 C steps.
.When operation starts, only the indoor and outdoor fans are operated for 1 minute. After 1 minute,
1
the room temperature and outside air temperature are sensed and the operation mode is
selected in accordance with the table below.
( Fig.5 : Outside air temperature zone selection )
32 C
10 C
( Table.4 Operation mode selection table)
Room temperature(TB)
TS+2 C TB
.When COOING was selected at
2
The same operation as COOLING OPERATION of item 1 above is performed.
When the room temperature has remained at (set tempareure -1 C) for 8 minutes, operation is
automatically switched to DRY and the same operation as DRY OPERATION of item 3 above
is performed.
If the room temperature reaches (set temperature+2 C during DRY operation, operation returns to
COOLING operation.
3 .When HEATING was selected at
above is performed.
When the compressor was stopped for 6 consecutive minutes by the temperature control function
4
after the COOLING or HEATING operation mode was selected at
to MONITORING and the operation mode is selected again.
C zone
B zone
A zone
Outside air temperature (TO)
TB > TS+ 2 C
TS-2 C
TB TS-2 C <
, the air conditioner operates as follow:
1
, the same operation as HEATING OPERATION of item 2
1
A zone B zone
Cooling
Monitoring
(automatic dry)
Monitoring Monitoring
Heating Heating
1
05-04
C zone
Cooling
(automatic dry)
Monitoring
Monitoring
above, operation is switched