Precautions When Troubleshooting; Disposal; Overview: Disposal; About Pump Down - Daikin Sky Air Advance Series Installer's Reference Manual

10.2

Precautions when troubleshooting

WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
11

Disposal

NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
11.1

Overview: Disposal

Typical workflow
Disposing of the system typically consists of the following stages:
1 Pumping down the system.
2 Bringing the system to a specialized treatment facility.
INFORMATION
For more details, see the service manual.
11.2

About pump down

The unit is equipped with an automatic pump down function, with
which you can collect all refrigerant from the system into the outdoor
unit.
NOTICE
The outdoor unit is equipped with a low pressure switch or
a low pressure sensor to protect the compressor by turning
it OFF. NEVER short-circuit the low pressure switch during
pump down operation.
RZA200+250D7Y1B
Sky Air Advance-series
4P573383-1 – 2019.04
11.3

To pump down

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.
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.
1 Turn ON the main power supply switch.
2 Make sure the liquid stop valve and the gas stop valve are
open.
3 Press the pump down button (BS2) for at least 8 seconds. BS2
is located on the PCB in the outdoor unit (see wiring diagram).
Result: The compressor
automatically, and the indoor unit fan might start automatically.
4 ±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.
5 Once the compressor stops (after 2~5 minutes), close the gas
stop valve within 3 minutes after the compressor has stopped.
Result: The pump down operation is finished. The user
interface may display "
operating. This is NOT a malfunction. Even if you press the ON
button on the user interface, the unit will NOT start. To restart
the unit, turn OFF the main power supply switch and turn it ON
again.
6 Turn OFF the main power supply switch.
NOTICE
Make sure to reopen both stop valves before restarting the
unit.
11 Disposal
and outdoor unit fan
" and the indoor unit may continue
Installer reference guide
start
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