
NO
Error
code
Description
Measures to be taken by installer
Measures to be taken by service
technician
28
E484
PFC overload error
-
1. Replace the PBA
29
E485
Input current sensor
error
-
1. Replace the outdoor unit PBA
30
E500
IPM for outdoor unit
inverter compressor
overheating error
1. Check the location of the outdoor
unit when temperature of a heat
insulating board is abnormally
high
1. Check the location of the outdoor unit
when temperature of a heat insulating
board is abnormally high
2. Tighten the screw
3. Replace the outdoor unit fan
4. Replace the outdoor unit PBA
31
E554
Gas leak error
1. Check opening of the service valve
2. Check the connection status of
EEV and re-connect the connector
3. Check for leakage on connected
part between the product and
pipe, and pipe and extended pipe
1. Open service valve
2. Check the connection status of EEV and
re-connect the connector
3. Find and block the leaking part and re-
charge the refrigerant
32
E556
Capacity setting error
between indoor
outdoor unit
1. Check the model name of the
indoor and outdoor unit
2. Check the indoor option and
re-input them
1. Check the indoor option
33
E557
Option mismatch error
between the indoor
units (only applies to
DPM model)
1. Check the model name within
indoor units
2. Check the indoor option and
re-input them
1. Check the indoor option and re-input
them
34
E469
Outdoor unit DC-Link
voltage sensor
1. Check the power
1. Check the power
Pumping down refrigerant
• 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.
WARNING
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 then let the compressor run for more than
5 minutes. (Compressor will immediately start, provided 3 minutes have elapsed since the last stop.)
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. After approximately 2 minute, close the valve on the low pressure side.
5. Stop operation of the air conditioner by pressing the (Power) button on the indoor unit or remote control.
6. Disconnect the pipes.
ENGLISH-63
04
INST
ALLA
TION