Filter
Top Products
– 113 –
EN-24 24
Super Digital Inverter
8 EARTHING
Connect the earth line properly following applicable technical standards.
Connecting the earth line is essential to preventing electric shock and to reducing noise and electrical charges on the outdoor
unit surface due to the high-frequency wave generated by the frequency converter (inverter) in the outdoor unit.
If you touch the charged outdoor unit without an earth line, you may experience an electric shock.
9 FINISHING
After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, cover them with finishing tape and clamp them
to the wall with off-the-shelf support brackets or their equivalent.
Keep the power wires and indoor/outdoor connecting wires off the valve on the gas side or pipes that have no heat insulator.
10
TEST RUN
• Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup.
To protect the compressor, power is supplied from the 380-415 VAC input to the unit to preheat the compressor.
•Check the following before starting a test run:
• That all pipes are connected securely without leaks.
• That the valve is open.
If the compressor is operated with the valve closed, the outdoor unit will become overpressurized, which may damage the
compressor or other components.
If there is a leak at a connection, air can be sucked in and the internal pressure further increases, which may cause a burst
or injury.
• Operate the air conditioner in the correct procedure as specified in the Owner’s Manual.
11
ANNUAL MAINTENANCE
• For an air conditioning system that is operated on a regular basis, cleaning and maintenance of the indoor/outdoor units are
strongly recommended.
As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor/outdoor units will need to be cleaned at
least once every 3 months. This cleaning and maintenance should be carried out by a qualified service person.
Failure to clean the indoor/outdoor units regularly will result in poor performance, icing, water leaking and even compressor
failure.
12
AIR CONDITIONER OPERATING CONDITIONS
For proper performance, operate the air conditioner under the following temperature conditions:
If air conditioner is used outside of the above conditions, safety protection may work.
Cooling operation Dry bulb temp. –15°C to 46°C
Heating operation Wet bulb temp. –20°C to 15°C
25 25-E
N
Super Digital Inverter
13
FUNCTIONS TO BE IMPLEMENTED LOCALLY
Handling Existing Pipe
When using the existing pipe, carefully check for the
following:
•Wall thickness (within the specified range)
• Scratches and dents
•Water, oil, dirt, or dust in the pipe
• Flare looseness and leakage from welds
•Deter
ioration of copper pipe and heat insulator
Cautions for using existing pipe
•Do not reuse a flare nut to prevent gas leaks.
Replace it with the supplied flare nut and then process it
to a flare.
•Blow nitrogen gas or use an appropriate means to keep
the inside of the pipe c
lean. If discolored oil or much
residue is discharged, wash the pipe.
• Check welds, if any, on the pipe for gas leaks.
When the pipe corresponds to any of the following, do not
use it. Install a new pipe i
nstead.
• The pipe has been opened (disconnected from indoor
unit or outdoor unit) for a long period.
• The pipe has been connected to an outdoor unit that
does not use refrigerant R22, R410A or R407C.
• The exist
ing pipe must have a wall thickness equal to or
larger than the following thicknesses.
•Do not use any pipe with a wall thickness less than these
thicknesses due to insufficient pressure capacity.
• When using a Ø1
9.1 mm gas pipe for the existing piping,
set bit 3 of SW802 (switch for existing pipe) on the P.C.
board of the outdoor unit to ON. In this case, the heating
performance may be reduced
depending on the outside
air temperature and room temperature.
Recovering Refrigerant
•Use refrigerant recovery switch SW801 on the P.C. board
of the outdoor unit to recover refrigerant when the indoor
or outdoor unit is moved.
• Before recovering the refrigerant in the existing system,
perform a cooling operation for at least
30minutes.
Procedure
1.Turn on the power of the air conditioner.
2. Select the FAN mode for indoor unit operation with the
remote controller.
3. Set SW804 on the P.C. board of the outdoor unit to all
OFF, and then press SW801
for 1 second or more. The
air conditioner enters the forced cooling mode for up to
10 minutes.
Operate or handle the valve to recover refrigerant during
this time period.
4. Upon completion of refrigerant recovery,
close the valve
and press SW801 for at least 1 second to stop operation.
5.Turn off the power.
DANGER
Be careful of electric shock because the P.C. board has an
electrical current running through it.
Reference outside
diameter (mm)
Wall thickness (mm)
Ø9.50.8
Ø15.9 1.0
Ø19.01.0
SW802
When shipped from factory When using existing pipe
1234
ON
1234
ON
SW800SW801 SW806SW802 SW803
ON
1234
ON
1234
SW804 SW805
ON
1234
ON
1234
Refrigerant
recovery switch
SW801
Existing pipe
switch SW802