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13.3
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.
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 (BS4) for at least 8 seconds. BS4
is located on the PCB in the outdoor unit (see wiring diagram).
Result:
The
compressor
automatically.
4 Once operation stops (after 3~5 minutes), close the liquid stop
valve and the gas stop valve.
Result: The pump down operation is finished. The user
interface may display "
" and 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. To restart
the unit, turn OFF the main power supply switch and turn it ON
again.
5 Turn OFF the main power supply switch.
NOTICE
Make sure to reopen both stop valves before restarting the
unit.
ERHQ+ERLQ011~016 + EHVH/X11+16S18+26CB
Daikin Altherma – Low temperature split
4P384975-1C – 2018.02
and
outdoor
unit
fan
start
13 Disposal
Installer reference guide
85
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