Functions To Be Implemented Locally - Toshiba RAV-SP404AT-E Installation Manual

Super Digital Inverter
11

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.
Reference outside
diameter (mm)
Ø6.4
Ø12.7
• Do not use any pipe with a wall thickness less than these
thicknesses due to insufficient pressure capacity.
Wall thickness (mm)
0.8
0.8
20
Recovering Refrigerant
• When recovering refrigerant during reinstallation of the
indoor or outdoor unit, etc., use the refrigerant recovery
switch on the terminal block of the outdoor unit.
Procedure
1. Start cooling operation for a while, and then stop the
operation.
2. Turn on the power supply.
3. Using the remote controller, set the indoor unit to FAN
operation.
4. Push the refrigerant recovery switch for 2 seconds or
more on the terminal block of the outdoor unit, after which
the forced cooling operation will begin (Max. 10 minutes).
Recover refrigerant by handling the valve.
5. After recovering the refrigerant, push the refrigerant
recovery switch while closing the valve. The operation
will stop.
6. Turn off the power supply.
DANGER
Be careful of electric shock because the P.C. board has an
electrical current running through it.
1 2 3
WARNING
These switches are used for service/maintenance and
should not be operated (the air conditioner may not operate
properly).
Refrigerant
recovery switch
ON
1 2 3
L N
EN