Multi F Four-Way Ceiling Cassette Service Manual

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Only for training and service purposes

LGE Internal Use Only

2. Pump Down

Part 5. Trouble Shooting

This function gathers the refrigerant present in the system to ODU

Use this function to store refrigerant of system in ODU for leakage or IDU replacement.

• Procedure

■

This function start Dip switch setting status of ODU PCB.

(1) Set the Dip switch as follow after shutting the power source down.

(2) Reset the power.

(3) Check that the Red LED of PCB is on during work.(The indoor unit is operated by force.)

(4) Pump down during forced cooling operation.

CAUTION

1. Use pump down function within guaranteed temperature range

IDU : 20~32C

ODU : 0~40C

2. Make certain that IDU doesn't run with thermo off mode during operation

3. After the compressor is starting operation, please complete Pump Down within 4 minutes.

4. Pump Down can be stopped (The compressor is turned off), because of compressor protection.

In this case, reset the power.