Fujitsu AMUG24LMAS, Руководство по обслуживанию

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18. PUMP DOWN OPERATION
AOUG36LMAS1
AOUG48LMAS1
When moving or discarding the air conditioner, in order to consider the environment and
avoid the discharge of refrigerant to the atmosphere, please pump down according to the
following procedure.
04-38
(1) Connect the pressure gauge to the charging port.
(2) Change the DIP switch on the board (SET1-2) to ON*1
*Be sure the power supply is
disconnected on the breaker
is turned off when changing
the DIP switch.
*1: DIP switch
(SET1-2)
ON
1 2 3 4
SET1
(3) To start operation, press the [PUMP DOWN] switch*2 for 3 seconds or press after the
power has been on for 3 min.
PUMP DOWN
1 W S
TEST RUN
*2: Push switch (SW1)
During pump down, the LED (POWER/MODE) will ash 3 times consecutively.
Blink
(3 times)
F E D C
MONITOR
ERROR
B A
POWER
MODE
NOTE:
If the [PUMP DOWN] switch is pressed during compressor operation, the compressor will
stop, and the operation will start after about 3 min.
(4) Close the liquid pipe valve.
(5) When 7.3 psi ~ 0 psi (0.05 MPa ~ 0 MPa) is shown, close the gas pipe valve.
(6) Stop pump down by pressing the [PUMP DOWN] switch for 3 seconds.
The LED will light as follows.
F E D C
MONITOR
ERROR
B A
POWER
MODE
Blink
(3 times)
(7) Disconnect the power supply or turn off the breaker.
NOTES:
If the pump down is not stopped by pressing the switch as in step (6), it will stop
automatically after 15 min. and the LED will light as follows. If the pump down is
complete, disconnect the power supply or turn off the breaker. If not completed open
the liquid pipe valve, and then start again from step (3).
F E D C
MONITOR
ERROR
B A
POWER
MODE
Blink
(3 times) Blink
(High-speed)
In order to interrupt the pump down operation, press the [PUMP DOWN] switch again.
The LED will return to the original display before starting pump down. (POWER/
MODE LED: On)
The pump down may stop before completion due to error. To complete the pump
down, correct the error, open the liquid pipe valve and then start from step (1) again.
Otherwise, the refrigerant can be recovered from the service port.
CAUTION
Make sure the refrigerant circuit for any leaks before starting the pump down opera-
tion.
Do not proceed with the pump down operation if there is no refrigerant left in the
circuit due to bent or broken piping.
During the pump down operation, be sure to turn off the compressor before removing
the refrigerant piping.
CAUTION
Always connect the power supply 12 hours prior to the start of the operation in order
to protect the compressor.
(1) Indoor unit
1
Is the drain normal?
2 Is there any abnormal noise and vibration during operation?
(2) Outdoor unit
1 Is there any abnormal noise and vibration during operation?
2
Will noise, wind, or drain water from the unit disturb the neighbors?
3 Is there any gas leakage?
Do not operate the air conditioner in the test running state for a long time.
For the operation method of the test run for indoor unit and central remote controller,
refer to the operating manual and perform operation check.
Be sure to temporarily disconnect the power supply or turn off the breaker before
changing the DIP switch settings.
(1) Check the 3-way valves (both at the liquid side and gas side) are opened. Con rm
that the DIP switch SET1-2 is switched OFF.
(2) Set the operation mode to COOL or HEAT . If you wish to change the DIP switch
SET1-1 to HEAT , switch it after temporarily disconnecting the power supply or
turning off the breaker switching the power off.
ON
1 2 3 4
SET1
SET1-1
HEAT
COOL
In the rst test run, be sure to set the operation mode to COOL .
The operation mode cannot be switched between COOL and HEAT during the test
run. To switch the operation mode between COOL and HEAT , stop the test run,
switch the operation mode, and then start the test run again.
TEST RUN
TEST RUN method
(3) Press TEST RUN switch for more than 3 seconds.
The POWER / MODE LED ashes once.
PUMP DOWN
1 W S
TEST RUN
F E D C
MONITOR
ERROR
B A
POWER
MODE
Blink
(1 time)
(4) Con rm operating status.
(5) Press TEST RUN switch for more than 3 seconds.
F E D C
MONITOR
ERROR
B A
POWER
MODE
POWER/MODE LED will turn on, and test run stops.
SW1