10 | Maintenance and service
Installer reference guide
72
RZAG71~140N
Sky Air Alpha-series
4P695307-1A – 2024.02
3 To prevent damaging the PCB, touch a non-coated metal part to eliminate
static electricity before pulling out or plugging in connectors.
4 Pull out junction connector X106A (A1P) for the fan motor in the outdoor unit
before starting service operation on the inverter equipment. Be careful NOT
to touch the live parts. (If a fan rotates due to strong wind, it may store
electricity in the capacitor or in the main circuit and cause electrical shock.)
5 After the service is finished, plug the junction connector back in. Otherwise
the malfunction code E7 will be displayed and normal operation will NOT be
performed.
For details refer to the wiring diagram labelled on the back of the service cover.
NOTICE
NEVER directly connect power supply cables to compressors (U,V,W). This can result
in a compressor burnout.
10.3 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.
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