Checklist For Yearly Maintenance Of The Outdoor Unit; About Service Mode Operation; To Use Vacuum Mode - Daikin RXYSA4A7V1B Installer And User Manual

25 | Maintenance and service

25.3 Checklist for yearly maintenance of the outdoor unit

25.4 About service mode operation

25.4.1 To use vacuum mode

Installer and user reference guide
142
8×
5 Pull out junction connector X1A (A4P) 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 electric shock.)
6 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.
Pay attention to the fan. It is dangerous to inspect the unit while the fan is running.
Make sure to turn off the main switch and to remove the fuses from the control
circuit located in 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.
Refrigerant recovery operation/vacuuming operation is possible by applying setting
[2‑21]. Refer to "22.2 Making field
When vacuuming/recovery mode is used, check very carefully what should be
vacuumed/recovered before starting. See installation manual of the indoor unit for
more information about vacuuming and recovery.
1 When the unit is at standstill, activate setting [2‑21] to start vacuuming mode.
Result: When confirmed, the indoor and outdoor unit expansion valves will
fully open. At that moment H1P lights and the user interface of all indoor units
indicate TEST (test operation) and
will be prohibited.
2 Evacuate the system with a vacuum pump.
4
settings" [ 117] for details how to set mode 2.
(external control) and the operation
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1A – 2020.07