Drain Pump Operation; During Cooling / Dry Mode; Float Switch Turns Off Less Than 3 Minutes; During Heating / Fan Mode / Stop Operation - Fujitsu AU*G36LRLA Service Instruction

1-27. DRAIN PUMP OPERATION (For AU/ AR type)
.

During Cooling / Dry mode

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 "Anti- freezing protection", 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:
1 The compressor, indoor and outdoor fan motor operation are stopped.
2 Drain pump operates continuously for 3 minutes after the float switch is turned off.
(Almost condensing water may be drained)
3 The indoor unit fan motor operates after the float switch is turned off.
5. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates.
(It is necessary to turn off power for release it. )
6. When the float switch turns OFF less than 3 minutes, the unit starts Cooling operation.
(Fig 22 : Detail of Drain Pump Operation)
ON
Compressor
OFF
ON
Drain Pump
OFF
<Float Switch turns OFF less than 3 minutes>
ON
Float Switch
OFF
ON
Compressor
OFF
ON
Indoor Fan
OFF
ON
Drain Pump
OFF
.

During Heating / Fan mode / 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 minutes, "FAILURE INDICATION" operates.
Thereafter, even if the float switch turns OFF, the "FAILURE INDICATION" is not released.
(It is necessary to turn off power for release it. )
ON
Float Switch
OFF
ON
Drain Pump
OFF
3 minutes
Less than 3 minutes
3 minutes ST
3 minutes
3 minutes
01-32