Functions To Be Implemented Locally - Toshiba RAV-SM1603AT-E1 Installation Manual

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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
Wall thickness (mm)
diameter (mm)
Ø9.5 0.8
Ø15.9 1.0
Ø19.0 1.0
• Do not use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity.
• To use an existing Ø19.0 mm pipe, set bit 5 of SW801 (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.
SW801 No.5
ON ON
5
1 2 3 4 5 6 1 2 3 4
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6
Recovering Refrigerant
• Use refrigerant recovery switch SW802 on the P.C. board of the outdoor unit to recover refrigerant when the indoor
or outdoor unit is moved.
Procedure
1. Turn on the power of the air conditioner.
2. Select the FAN mode for indoor unit operation with the remote controller.
3. Press refrigerant recovery switch SW802 on the P.C. board of the outdoor unit to drive the air conditioner into the
forced cooling mode for up to 10 minutes. Open the valve to start refrigerant recovery.
4. Upon completion of refrigerant recovery, close the valve and press SW802 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.
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P.C Board
Refrigerant
recovery
switch SW802
Existing pipe
switch SW801
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