Daikin FCQ71B7V3B [155/381] Drain pump control

Daikin FUQ125BUV1B [155/381] Drain pump control
ESIEN05-04 Functional concept
Part 2 Functional Description 2–17
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1.13 Drain Pump Control
Purpose Control the water draining from the drain pan.
Starting conditions The drain pump control starts the drain pump motor when one of the following conditions is fulfilled:
Q Cooling operation is activated
Q Abnormal high water level is detected in the drain pan
Normal control In normal control, the drain pump is turned ON at compressor starting and turned OFF 5 minutes after
the compressor has stopped (residual operation).
Float switch
activation during
thermostat OFF
When an abnormal drain level is detected in the drain pan, the float switch opens:
1 The thermostat stays forced OFF.
2 The drain pump starts to operate for minimum 10 minutes (even if abnormality is solved within the
10 minutes).
3 If the float switch closes again within 80 seconds, cooling operation can restart within the 10
minutes recovery period.
Drain pump
ON
OFF
Compressor
ON
OFF
5 min
Water level
abnormality
Abnormal
Normal
5 min
5 min
1 min 20
5 s
Normal
Float switch
Compressor
Drain pump
Error processing
OFF
OFF
ON
ON

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