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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.
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.
• 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.
Cooling operation
Dry bulb temp.
–15 °C to 46 °C
Heating operation
Wet bulb temp.
–27 °C to 15 °C
Reference outside
diameter (mm)
Wall thickness (mm)
Material
6.4
0.8
—
9.5
0.8
—
12.7
0.8
—
15.9
1.0
—
19.1
1.2
—
22.2
1.0
Half hard
28.6
1.0
Half hard
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.
• In the initial LED display status, D805 is lighted as shown on the right. 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.
LED display initial status
* 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.
D800
(Yellow)
D801
(Yellow)
D802
(Yellow)
D803
(Yellow)
D804
(Yellow)
D805
(Green)
or
or
or
or
or
OFF or Rapid
flashing
OFF or Rapid
flashing
OFF or Rapid
flashing
OFF or Rapid
flashing
OFF or Rapid
flashing
ON
:
:
:
:
D800
D801
D802
D803
D805
D804
(Yellow)
(Green)
• There are four LEDs display patterns.
Service switches
LED displays
(Yellow)
(Yellow)
(Yellow)
(Yellow)
ON
OFF
Rapid flashing (5 times/sec.)
Slow flashing (1 time/sec.)
LED displays
137-EN
138-EN
