Samsung AC BNPDBC Series User & Installation Manual page 70

Troubleshooting
Error
No.
Code
71 E554 Detected full gas leakage
Error due to mismatching capacity of indoor and
72 E556
outdoor unit
73 E660 Inverter Boot Code error
Pumping down refrigerant
WARNING
• After installing the product, be sure to perform leak tests on the piping connections. After pumping
down refrigerant to inspect or relocate the outdoor unit, be sure to stop the compressor and then
remove the connected pipes.
Do not operate the compressor while a valve is open due to refrigerant leakage from a pipe or an
unconnected or incorrectly connected pipe. Failure to do so may cause air to flow into the compressor
and too a high pressure to develop inside the refrigerant circuit, leading to an explosion or product
malfunction.
Pump-down is an operation intended to collect all the system refrigerant in the outdoor unit. This operation
must be carried out before disconnecting the refrigerant pipe in order to avoid refrigerant loss to the
atmosphere.
1 Turn the system on in cooling with fan operating at high velocity and
2 Release the valve caps on High and Low pressure side.
3 Use L-wrench to close the valve on the high pressure side.
4
5 Stop operation of the air conditioner by pressing the (Power) button on
the indoor unit or remote control.
6 Disconnect the pipes.
70 English
Meaning Remarks
1. Check if the service valve is open
2. Check the amount of the refrigerant in
the outdoor unit
3. Check for refrigerant leakage (pipe
connection, pipe extension and others)
and charge refrigerant if necessary
4. Check the sensor of the indoor unit
5. Check for EEV connection and connect
them again if necessary
Check the indoor and Outdoor unit
Capacity
-
B(liquid)
A(gas)