22 | Maintenance and service
Installer and user reference guide
138
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
Model Result
8HP When confirmed, the expansion valves (in the indoor
unit, compressor unit and heat exchanger unit) will fully
open. At that moment the 7‑segment display indication=
and the user interface of all indoor units indicate
TEST (test operation) and (external control) and the
operation will be prohibited.
2 Evacuate the system with a vacuum pump.
3 Press BS1 (in case of 5HP) or BS3 (in case of 8HP) to stop vacuuming mode.
22.4.2 To recover refrigerant
This should be done with a refrigerant recovery unit. Follow the same procedure as
for vacuuming method.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump down the system, and there
is a leak in the refrigerant circuit:
▪ Do NOT use the unit's automatic pump down function, with which you can collect
all refrigerant from the system into the outdoor unit. Possible consequence: Self-
combustion and explosion of the compressor because of air going into the
operating compressor.
▪ Use a separate recovery system so that the unit's compressor does NOT have to
operate.
NOTICE
Make sure to NOT recover any oil while recovering refrigerant. Example: By using an
oil separator.
To Next Page
Loading...
Need help?
General
