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DRAIN PUMP OPERATING SEQUENCE

When the indoor unit is in cooling mode, the drain pump operation is on. If the indoor unit stops or changes to another mode, the

drain pump runs for 40 seconds before turning OFF.

The drain pump uses the following sequence of operation:

• The float switch is tripped when the water level rises to a certain level within the drain pan.

Regardless of the indoor unit mode, the drain pump is forced to turn ON immediately.

• The float switch resets when the water level drops below a certain level in the drain pan.

The pump keeps its previous operating condition for another one minute, and then goes to normal operating conditions. Otherwise,

the thermostat turns off and returns an error if the water level does not decrease in three minutes. The preset thermostat mode

operation will not continue until the float switch is reset.

Fig. 27 —Float Switch is Tripped while Cooling Thermo-On

Fig. 28 —Float Switch is Tripped while Cooling Thermo-Off

Thermostat

(Operating)

Float switch

Drain pump

40s

3 min

OFF

Error code ರEEರ will be reported if the float

switch is not reset within 3min

Reset