Annual Maintenance; Air Conditioner Operating Conditions; 1320 13 Functions To Be Implemented Locally - Toshiba RAV-GM802ATW-E Installation 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:
Cooling operation Dry bulb temp.
Heating operation Wet bulb temp.
If air conditioner is used outside of the above conditions, safety protection may work.
13
Functions to be implemented locally
■ Handling Existing Pipe (Refer to 15 Appendix)
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.
49-EN
-15 °C to 46 °C
-15 °C to 15 °C
– 25 –
• The existing pipe must have a wall thickness equal to or larger than the following thicknesses.
Reference outside
Wall thickness (mm)
diameter (mm)
6.4
9.5
12.7
15.9
• Do not use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity.
■ Refrigerant recovery
When recovering the refrigerant in situations such as when relocating an indoor unit or outdoor unit, the recovery
operation can be performed by operating the SW01 and SW02 switches on the P.C. board of the outdoor unit.
A cover for the electric parts has been installed in order to provide protection from electric shocks while work is
being performed. Operate the service switches and check the LED displays with this electric parts cover in place.
Do not remove this cover while the power is still on.
DANGER
The entire P.C. board of this air conditioner system is a high-voltage area.
When operating the service switches with the power of the system left on, wear electrically insulated gloves.
LED displays
   
D800 D801 D802 D803
(Yellow) (Yellow) (Yellow) (Yellow)
• There are four LEDs display patterns.
: ON
: OFF
: Rapid flashing (5 times/sec.)
: Slow flashing (1 time/sec.)
* In the initial LED display status, D805 is lighted as shown on the below. If the initial status is not established (if
D805 is flashing), hold down the SW01 and SW02 service switches simultaneously for at least 5 seconds to
return the LED displays to the initial status.
D800 D801
(Yellow) (Yellow)
or or
Rapid Rapid
OFF or OFF or
flashing flashing
* In order to reduce standby power, the LED indication may be turned off even when the power is on. When either
SW01 or SW02 is pressed, the LED is displayed.
Material
0.8 -
0.8 -
0.8 -
1.0 -
 
D804 D805
(Yellow) (Green)
LED displays
LED display initial status
D802 D803 D804
(Yellow) (Yellow) (Yellow)
or or or
Rapid Rapid Rapid
OFF or OFF or OFF or
flashing flashing flashing
Service switches
D805
(Green)
ON
50-EN