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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.
Service switches
SW01, SW02
LED displays
D800
D801
D802
D803
D804
D805
(Yellow) (Yellow) (Yellow) (Yellow) (Yellow) (Green)
• There are four LEDs display patterns.
: ON
: OFF
: Rapid
fl
ashing (5 times/sec.)
: Slow
fl
ashing (1 time/sec.)
y
In the initial LED display status, D805 is lighted as shown on the table below. If the initial status is not
established (if D805 is
fl
ashing), 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
D800
(Yellow)
D801
(Yellow)
D802
(Yellow)
D803
(Yellow)
D804
(Yellow)
D805
(Green)
or
or
or
or
or
OFF or
Rapid
fl
ashing
OFF or
Rapid
fl
ashing
OFF or
Rapid
fl
ashing
OFF or
Rapid
fl
ashing
OFF or
Rapid
fl
ashing
ON
Steps taken to recover the refrigerant
1. Operate the indoor unit in the fan mode.
2. Check that the LED displays are placed in their initial status. If not, place them in the initial status.
3. Hold down SW01 for at least 5 seconds, and check that D804
fl
ashes slowly. (Fig. 1)
4. Press SW01 once to set the LED displays (D800 to D805) to the “refrigerant recovery LED display” shown
below. (Fig. 2)
(Fig. 1)
(Fig. 2)
LED displays indicated when step 3 is taken
Refrigerant recovery LED display
D800
D801
D802
D803
D804
D805
D800
D801
D802
D803
D804
D805
: ON, : OFF, : Slow
fl
ashing
: ON, : OFF, : Rapid
fl
ashing
5. Press SW02 to set D805 to rapid
fl
ashing. (Each time SW02 is pressed, D805 is switched between rapid
fl
ashing and OFF.) (Fig. 3)
6. Hold down SW02 for at least 5 seconds, and when D804
fl
ashes slowly and D805 lights, the forced cooling
operation is started. (Max. 10 minutes) (Fig. 4)
(Fig. 3)
(Fig. 4)
LED displays indicated when step 5 is taken
LED displays indicated when step 6 is taken
D800
D801
D802
D803
D804
D805
D800
D801
D802
D803
D804
D805
: ON, : OFF, : Rapid
fl
ashing
: ON, : OFF, : Slow
fl
ashing
7. After operating the system for at least 3 minutes, close the valve on the liquid side.
8. After the refrigerant has been recovered, close the valve on the gas side.
9. Hold down SW01 and SW02 simultaneously for at least 5 seconds. The LED displays are returned to the initial
status, and the cooling operation and indoor fan operation stop.
10. Turn off the power.
* If there is any reason to doubt whether the recovery was successful in the course of this operation, hold down
SW01 and SW02 simultaneously for at least 5 seconds to return to the initial status, and then repeat the steps
for recovering the refrigerant.
