To Release Refrigerant - Daikin CO2 Conveni-pack LRYEN10A7Y1 Installer And User Reference Manual

23 | Maintenance and service

23.3 To release refrigerant

Installer and user reference guide
122
A9P Outdoor unit, switchbox left
A10P Outdoor unit, switchbox middle
A11P Outdoor unit, switchbox right
A4P Capacity up unit, switchbox
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 connectors for the fan motors 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.)
Model
Outdoor unit
Capacity up unit
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, see the wiring diagram labelled on the back of the service cover.
Also see "Label about servicing switch
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.
Refrigerant R744 can be released into the atmosphere. You do not have to recover
it.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage
NEVER pump down the system if there is a leak in the refrigerant circuit. Possible
consequence: self-combustion and explosion of the compressor because of air going
into the operating compressor.
CAUTION
Do NOT pump down when the ambient temperature is high. The safety valve on the
liquid receiver is set to 86 bar. If the refrigerant temperature is ≥31°C, the safety
valve might be activated. When you close the stop valves, ALWAYS and REGULARLY
check the pressure in the circuit and avoid that the safety valve is activated.
NOTICE
Make sure to NOT remove any oil while releasing refrigerant. Example: By using an
oil separator.
A9P/A10P/A11P/A4P
N1
P1
Junction connectors for fan motors
X1A, X2A, X3A, X4A, X5A, X6A
X1A, X2A
4
box" [ 44].
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08