15
The total charging amounts relate to the refrigerant piping
length as in "Maximum total one-way piping length" of the
table in paragraph "8.4. Allowable pipe length and height
difference" on page 8.(E.g. twin: L1+L2)/
This unit is equipped with an automatic pump down operation
which will collect all refrigerant from the field piping and indoor
unit in the outdoor unit. To protect the environment, make sure
to perform the following pump down operation when relocating
or disposing of the unit.
Model
Refrigerant piping length (liquid side)
5-10m
(a)
10-20m
20-30m
30-40m
40-50m
50-60m
60-70m
1UH105NS1ERG
1UH125P1ERG
1UH125P1ERK
3.7 3.7 3.7 4.15 4.6
1UH140P1ERG
1UH140P1ERK
670-80m
1UH071N1ERG
1UH090N1ERG
2.5 2.5 2.5 2.95 3.4
-
-
-
-
-
-
2.5 2.5 2.5 2.95 3.4 3.85
-
-
-
-
5.05 5.5 5.95
10. Pump down operation
9.4. Total charging weight of the refrigerant
(after a leak, etc.)
INFORMATION
For more details, refer to the applicable service manual.
When in need of operation, turn off the main power supply
and turn it on again. Make sure that stop valves both on
liquid and gas side are open and be sure to ooperate the
unit in cooling operation during test run.
Make sure to re-open both stop valves before restarting
operation of the unit.
1 Make sure that stop valves
both on liquid and on gas side
are open.
2 Push the BS4 pumping-down
operation button on the PC
board of the outdoor unit (8
seconds).
Never leave the outdoor
unit unattended with
oopened front panel when
power supply is on.
In case the stop valve on
the liquid side is not
securely closed during
compressor operation,
during compressor
operation, pumping-down
operation cannot be
executed.
Compressor and outdoor
fan will start operation
automatically.
The indoor unit fan may
automatically start running.
Please pay attention to
this.
_
3 Close the stop valve on the
liquid side securely about 2
minutes after the compressor
started ooperation.
4 Once compressor operation
stops after 2 to 5 minutes (a),
close the stop valve on the
gas side securely.
5 Turn off the power supply.
(a) If after finishing pumping-down operation the outdoor
unit does not operate, not even when the remote controller
switch is turned on, the remote controller may or may
not indicate " ". But this is not a malfunction.
WARNING
All wiring must be performed by an authorized
electrician.
All components procured on the side and all elecrtic
construction shall comply with the applicable
legislation.
11. Electrical wiring work
WARNING
To avoid electrical shock, make sure to disconnect the
power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute, always measure
the voltage at the terminals of main circuit capacitors
or electrical parts and, before touching , make sure that
those voltages are 50VDC or less.
DANGER: HIGH VOLTAGE
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