Daikin Outdoor Inverter Heat Pump Unit RZAG100M7V1B

Completely recharging refrigerant

Before completely recharging refrigerant, make sure the following is done

1. All refrigerant is recovered from the system

2. The outdoor unit's external refrigerant piping is checked (leak test, vacuum drying)

3. Vacuum drying on the outdoor unit's internal refrigerant piping is performed

Before completely recharging, perform vacuum drying on the outdoor unit's internal refrigerant piping as well

To perform vacuum drying or a complete recharge of the outdoor unit’s internal refrigerant piping it is necessary to activate the vacuum mode (see "6.6.9 To activate/deactivate the vacuum mode field setting" on page 21)

DANGER: RISK OF EXPLOSION - Pump down – Refrigerant leakage

Do NOT use the unit's automatic pump down function to collect all refrigerant into the outdoor unit if there is a leakage in the refrigerant circuit. Use a separate recovery system so that the unit's compressor does NOT have to operate.

CAUTION: Do not use the unit's automatic pump down function if the total piping length exceeds the chargeless length. A fraction of the refrigerant could be left in the circuit.

Turn ON the main power supply switch

Make sure the liquid stop valve and the gas stop valve are open

Press the pump down button (BS2) for at least 8 seconds. BS2 is located on the PCB in the outdoor unit (see wiring diagram). The compressor and outdoor unit fan start automatically. The indoor unit fan might start automatically.

±2 minutes after the compressor started, close the liquid stop valve. If it is not closed properly during compressor operation, the system cannot be pumped down.

Once the compressor stops (after 2~5 minutes), close the gas stop valve within 3 minutes after the compressor has stopped. The pump down operation is finished. The user interface may display ' '. The indoor pump may continue operating. This is NOT a malfunction. Even if you press the ON button on the user interface, the unit will NOT start.

Turn OFF the main power supply switch

NOTICE: Maintenance must be done by an authorised installer or service agent

We recommend to do maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals

In Europe, the greenhouse gas emissions of the total refrigerant charge in the system (expressed as tonnes CO2-equivalent) is used to determine the maintenance intervals. Follow the applicable legislation.

Formula to calculate the greenhouse gas emissions: GWP value of the refrigerant × Total refrigerant charge [in kg] / 1000

Maintenance safety precautions: DANGER: RISK OF ELECTROCUTION, DANGER: RISK OF BURNING, 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

To prevent electrical hazards when performing service to inverter equipment

Did you wait for 10 minutes after the power supply is turned off before opening the electrical component box cover?

Did you measure the voltage between terminals on the terminal block for power supply with a tester and confirm that the power supply is shut off?

Warning: Only trained personnel should perform this procedure. Always use protective gloves and safety glasses.

Information: Depending on the units and/or the installation conditions, it might be necessary to connect electrical wiring before you can charge refrigerant.

Outdoor unit's external refrigerant piping checked (leak test, vacuum drying)?

Refrigerant piping connected and checked (leak test and vacuum drying)?

Warning: Only use R32 as refrigerant. Other substances may cause explosions and accidents. R32 contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 675. Do NOT vent these gases into the atmosphere.

Caution: To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant.

Upload a photo of the connected refrigerant cylinder to both the service port of the gas stop valve and the service port of the liquid stop valve.

Enter the additional refrigerant amount charged.