Maintenance Safety Precautions; To Prevent Electrical Hazards - Daikin RXYSA4A7V1B Installer And User Manual

25.2 Maintenance safety precautions

25.2.1 To prevent electrical hazards

RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1A – 2020.07
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
WARNING
Prior to start working on systems containing flammable refrigerant, safety checks are
necessary to ensure that the risk of ignition is minimised. Therefore, some
instructions should be followed.
Please refer to the service manual for more information.
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch a metal part of the unit in
order to eliminate static electricity and to protect the PCB.
When performing service to inverter equipment:
1 Do NOT open the electrical component box cover for 10 minutes after turning
off the power supply.
2 Measure the voltage between terminals on the terminal block for power
supply with a tester and confirm that the power supply is shut off. In addition,
measure points as shown in the figure, with a tester and confirm that the
voltage of the capacitor in the main circuit is less than 50 V DC.
V
A1P
3 To prevent damaging the PCB, touch a non-coated metal part to eliminate
static electricity before pulling out or plugging in connectors.
4 Discharge residual power from the backup PCB. To do this, remove the top
cover and press the button on the backup PCB for 3 seconds (see illustration
below).
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Maintenance and service
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Installer and user reference guide
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