14 | Maintenance and service
Installer reference guide
68
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
WARNING
▪ Before carrying out any maintenance or repair activity, ALWAYS switch off the
circuit breaker on the supply panel, remove the fuses or open the protection
devices of the unit.
▪ Do NOT touch live parts for 10 minutes after the power supply is turned off
because of high voltage risk.
▪ Please note that some sections of the electric component box are hot.
▪ Make sure you do NOT touch a conductive section.
▪ Do NOT rinse the unit. This may cause electric shocks or fire.
14.3 Checklist for yearly maintenance of the outdoor unit
Check the following at least once a year:
▪ Heat exchanger
The heat exchanger of the outdoor unit can get blocked up due to dust, dirt,
leaves, etc. It is recommended to clean the heat exchanger yearly. A blocked
heat exchanger can lead to too low pressure or too high pressure leading to
worse performance.
14.4 About the compressor
When servicing the compressor keep in mind following precautions:
DANGER: RISK OF ELECTROCUTION
▪ Use this compressor on a grounded system only.
▪ Turn the power off before servicing the compressor.
▪ Reattach the switch box cover and service lid after servicing.
CAUTION
ALWAYS wear safety glasses and protective gloves.
DANGER: RISK OF EXPLOSION
▪ Use a pipe cutter to remove the compressor.
▪ Do NOT use the brazing torch.
▪ Use approved refrigerants and lubricants only.
DANGER: RISK OF BURNING/SCALDING
Do NOT touch the compressor with bare hands.
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