Specifications

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43
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Note (1) After the thermostat is reset, it returns to the hot start
control.
Indoor heat exchanger temperature(˚C)
(Setting air flow)
40
45
Lo
20
30
Lo
Stop
Indoor heat exchanger temperature (˚C)
9) Condensate pump motor (DM) control
During the cooling or Dehumidifying operation, the condensate pump motor (DM) is synchronized with the start of
compressor operation. If the operation is switched from the operation stop, error stop, thermostat stop and the cooling
of defrosting operation to the fan or heating operation, the drain motor continues to operate for 2 minutes after the
switching.
Overflow detection by means of the float switch is always on regardless of the operation mode. If an overflow occurs
(or the float switch is not connected or the wire is broken), the operation is interrupted as the error stop and the drain
motor is operated until the state of float switch is normalized.
6) FM control with the heating thermostat turned off (For cold draft prevention)
In order to prevent a cold draft while the heating thermostat is turned off, the indoor blower is controlled in response to
the temperature of the indoor heat exchanger as illustrated below. It should be noted that if SW3-4 on the indoor PCB
is turned off, the indoor blower will stop so far as the temperature of the indoor heat exchanger is lower than 40˚C. It
will be turned to the Lo operation 5 minutes later.
7) Hot start (Cold draft prevention during heating)
1) If the indoor heat exchanger temperature is lower than 30˚C when the heating operation has started, the following
indoor blower control is performed.
(1) In case of the thermostat off condition: Lo operation
(2) In case of the thermostat on condition : Stop
(3) If the indoor heat exchanger temperature exceeds 30˚C or 7 minutes after the beginning of hot start, the hot
start terminates and it returns to the setting airflow of the blower.
2) If the indoor heat exchanger temperature is lower than 30˚C when the unit is heating under the thermo-ON
condition, the indoor fan operates in the Lo mode. As the temperature rises higher than 30 ˚C or 7 minutes after the
beginning of hot start, the hot start terminates and it returns to the setting air flow.
8) Indoor fan control during defrost operation
1) The indoor fan operation is changed from the setting airflow to the Lo operation 40 seconds before the start of
defrost operation (when the defrost thermostat is turned ON) and stops if the indoor heat exchanger temperature
drops below 20˚C.
2) After the stop as described in 1)-above, the control will be conducted as illustrated below depending on the indoor
heat exchanger temperature.
3) If the indoor heat exchanger temperature rises beyond 30˚C of 7 minutes after the end of defrosting, the indoor fan
control related to the defrosting is completed.