EN-5
Pump down is adopted in the case of unit removal for re-installation, abandonment,
repair etc.
Pump down is to collect the refrigerant into the outdoor unit.
PROCEDURE USING GAUGE MANIFOLD
(Recommended procedure)
(1) Connect the gauge manifold hose to the service port of the stop valve(gas side).
(2) To start pump down, press the PUMP DOWN button(SW1) for 5 seconds or more.
• All LED (LED1A, LED1B) on the display board will
fl
ash alternately.
• The OPERATION lamp on the indoor unit will
fl
ash and three BEEP will be emitted.
(3) After 5-10 minutes, fully close the stop valve (liquid side).
(4) Close the stop valve (gas side) when the compound gauge reading becomes almost
0 MPa(0 cmHg).
(5) To stop the pump down, press the PUMP DOWN button(SW1) for 5 seconds or
more.
(6) Disconnect the gauge manifold hose from the service port.
PUMP DOWN
Caution:
• Make sure that the compressor is turned off before removing the
refrigerant pipes. Otherwise, it will cause burst and injury.
• Do not perform PUMP DOWN when refrigerant is leaking or there is no
refrigerant in the refrigerant cycle. Otherwise, it will cause burst and injury.
• In order to prevent malfunctioning of compressor, be sure to turn off the pump
down operation within 10 minutes after closing the stop valve of liquid side.
Note:
• Wait more than 90 seconds after
fi
nishing pump down, and turn
off the circuit breaker.
PROCEDURE WITHOUT USING GAUGE MANIFOLD
(1) To start pump down, press the PUMP DOWN button(SW1) for 5 seconds or more.
• All LED (LED1A, LED1B) on the display board will
fl
ash alternately.
• The OPERATION lamp on the indoor unit will
fl
ash and three BEEP will be emitted.
(2) After 5-10 minutes, fully close the stop valve (liquid side) .
(3) After 2-3 minutes, close the stop valve (gas side) fully.
(4) To stop the pump down, press the PUMP DOWN button(SW1) for 5 seconds or more.
PUMP DOWN
WIRE CHECK
LED1B
SW1
SW2
Lo
Hi
Stop valve
(liquid side)
Service
port
Stop valve
(gas side)
Compound
gauge
PUMP DOMN button (SW1)
OFF
1
2
ON
PUMP DOWN
SELECT
WIRE CHECK
OFF
1
2
ON
LED1B
DSW1
SW1
SW2
LED1A
• During the heating operation, the unit will automatically stop when the
outdoor temperature drops below 5°F(-15°C) to prevent the outdoor
unit from the damage caused by the freezing of the drained water. The
unit will stop its operation for 4 hours and then resume the operation
when the outdoor temperature rises above 7°F(-13.9°C).
• To inactivate this function, slide the SELECT switch(DSW1) #1 to OFF
side.
SELECT
switch
(DSW1)
5°F(-15°C) AUTO STOP FUNCTION
Is the speci
fi
ed power supply voltage used?
Is the connecting cable
fi
xed to terminal board
fi
rmly?
Is the earth wire connected properly arranged?
Is the unit drainage properly?
Is there any gas leakage at the pipe connection?
EXPLANATION TO CUSTOMER
• Explain to the customer how to use and maintain the
system, referring to the operation manual.
• Ask the customer to carefully read the operation manual.
• When the system has been set up, hand the installation
manual to the customer.
8 ITEMS TO CHECK
7 TEST RUN
• See the installation manual accompanying indoor unit.
• Be sure to perform test run of indoor unit individually, and then to perform all the units simultaneously.
• After the unit is turned off, the unit will not start operation for 3 minutes to protect the unit.
DSW1
Note:
• Make sure not to slide the SELECT switch(DSW1) #2 to OFF side.
AE-X2M20RU_3_LANG.indb EN-5
AE-X2M20RU_3_LANG.indb EN-5
2013-12-19 21:01:21
2013-12-19 21:01:21
