Daikin Outdoor Inverter Heat Pump Unit RZAG71M7V1B

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

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. When charging refrigerant, always use protective gloves and safety glasses.

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

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

Electrical wiring connected if necessary

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

Enter the amount of additional refrigerant charged

Enter any issues encountered during the process

Sign off on the refrigerant charging

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.

NOTICE: 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.

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.

Did you wait for 10 minutes after turning off the power supply 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?

Did you touch a non-coated metal part to eliminate static electricity before pulling out or plugging in connectors?

Did you pull out junction connectors for the fan motors in the outdoor unit before starting service operation on the inverter equipment?

Did you plug the junction connector back in after the service is finished?

Did you avoid directly connecting power supply cables to compressors (U, V, W)?