26
Super Digital Inverter
EN
EN
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
•
Deterioration 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 clean. 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 instead.
•
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 existing 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 Ø19.1 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 30 minutes.
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)
Ø9.5
0.8
Ø15.9
1.0
Ø19.0
1.0
SW802
When shipped from factory
When using existing pipe
1 2 3 4
ON
1 2 3 4
ON
SW800 SW801 SW806
SW802
SW803
ON
1
2
3
4
ON
1
2
3
4
SW804
SW805
ON
1
2
3
4
ON
1
2
3
4
Refrigerant
recovery switch
SW801
Existing pipe
switch SW802
26-EN
Summary of Contents for RAV-SP1104AT8-E
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