After the power is turned on, the following operation is controlled automatically to control the most suitable refrigerant
charge according to the operation mode and operation conditions of each unit.
Electronic expansion valve control process.
The electronic expansion valve adjusts the opening by selecting the number of pulses from the rated capacity,operation
mode ( cool / heat ) and set temperature of each indoor unit.
(1) The air conditioner restarts with the previous setting operation.
(2) When the air conditioner restarts, the "THREE MINUTE DELAY FUNCTION" operates.
When the air conditioner restarts, the " THREE MINUTE DELAY FUNCTION " operates.
(3) When the air conditioner restarts for heating operation, the "COLD AIR DISCHARGE PREVENTION FUNCTION"
operates.
(1) When cooling and refrigerant circulation starts, the drain pump starts simultaneously.
(2) The drain pump operates continuously for 3 minutes after the refrigerant circulation stopped.
(3) When the refrigent circulation is stopped by a start of indoor heat exchanger frost provention
operation, the drain pump will turn off in 1 hour after the end of indoor heat exchanger frost
provention operation.
(4) When the water level in the drain pan rises up and then the float switch functions:
Microcomputer stops the refrigerant circulation and indoor fan motor operation.
Drain pump operates continuously for 3 minutes after the float switch is turned off.
(Almost condensing water may be drained)
(5) When the float switch turns ON continuously for 3 minutes, 'FAILURE INDICATION' operates.
(6) When the float switch turns OFF within 3 minutes, the unit starts cooling operation.
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4-9 DRAIN PUMP OPERATION
4-8 AUTO RESTART
4-7 ELECTRONIC EXPANSION VALVE CONTROL
04-15
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