Drain Pump Operation; Energy Save Function - Fujitsu AU*24LUAR Service Instruction

5-18. DRAIN PUMP OPERATION

During Cooling / Dry operation
1. When the compressor starts, the drain pump starts simultaneously.
2. The drain pump operates continuously for 3 minutes after the compressor is turned off.
3. When the compressor stops by the "Indoor heat exchanger de-icing function", the drain pump is turned off in 1 hour
after the compressor stops.
4.When the water level in the drain pan rises up and then the float switch functions:
The compressor, indoor and outdoor fan motor operation are stopped.
1
Drain pump operates continuously for 3 minutes after the float switch is turned off.
2
(Almost condensing water may be drained)
5. When the float switch turns ON continuously for 3 min., "FAILURE INDICATION" operates.
6. When the float switch turns OFF within 3 min., the unit starts cooling operation.
During Heating / Fan / Stop operation
1.When the water level in the drain pan rises up and then the float switch functions:
Drain pump operates continuously for 3 minutes after the float switch is turned off.
1
(Almost condensing water may be drained)
2. When the float switch turns ON continuously for 3 min., "FAILURE INDICATION" operates.

5-19. ENERGY SAVE FUNCTION

1. During Cooling / Dry operation:
The thermostat temperature setting increases by 1 degC as soon as the ENERGY SAVE button is pressed,
and then increases by 1 degC after 1 hour later.
Afterwards, energy consumption is saved by continuing to cool or dry at a thermostat temperature of 2 degC
higher than setting temperature.
ENERGY
SAVE ON
2. During Heating operation:
The thermostat temperature setting decreases by 1 degC as soon as the ENERGY SAVE button is pressed,
and then decreases by another 1 degC every 30 minutes.
Afterwards, energy consumption is saved by continuing to heat at a thermostat temperature of 4 degC
lower than setting temperature.
ENERGY
SAVE ON
1hour.
1 degC
1degC 2degC 3degC 4degC
30min.
1 hour.
1 hour
30 min.
2 degC
Setting
temperature
Setting
temperature
05-18