Compressor Preheating; Minimum Heat Operation; Economy Operation - Fujitsu ASU18RLB Service Instructions Manual

17. COMPRESSOR PREHEATING

When the outdoor heat exchanger temperature is lower than 41°F(5°C) and the all operation has
been stopped for 30 minutes, power is applied to the compressor and the compressor is heated.
(By heating the compressor, warm air is quickly discharged when operation is started.)
When operation was started, and when the outdoor heat exchanger temperature rises
to 44.6°F(7°C) or greater, preheating is ended.

18. MINIMUM HEAT OPERATION

MINIMUM HEAT OPERATION performs as below when pressing MIN. HEAT button or Weekly timer
setting on the remote controller.
( Table 17 : Minimum heat operation )
Mode
Setting temperature
Fan mode
LED display
Defrost operation

19. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller.
At the maximum output, ECONOMY Operation is approximately 70% of normal air conditioner operation
for cooling and heating.
The ECONOMY operation is almost the same operation as below settings.
( Table 18 : Economy operation )
Mode
Target temperature
Heating
50°F(10°C)
Auto
Economy
Operate as normal
Cooling/ Dry
Setting temp.+2°F(+1°C)
Heating
Setting temp.-2°F(-1°C)
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