Sharp AE-XM24HR, Service Manual

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AEXM24HR
4 – 4
Pump down
(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 by control
of the stop valves and the compressor.
(1) Turn the circuit breaker on.
(2) Check that all LED (1.2.3.4)
on the display board unit are flashing synchronously in a slow
(one flash per second) cycle.
(3) Stop the air conditioner operation.
(4) Remove both valve shaft caps of the stop valves.
(5) Press the PUMP DOWN SWITCH (SW1) on the display board
unit for 5 seconds or more. The indoor/outdoor unit will start
operation in the pump down mode.
(the OPERATION lamp on the indoor unit will flash and three
BEEP will be emitted.)
(6) After 5 ~ 10 minutes, fully close the stop valve (liquid side) by
turning the hexagon socket screw key clockwise.
(7) After2~3minutes, immediately close the stop valve (gas side) fully.
(8) Press the PUMP DOWN SWITCH (SW1) on the display board
unit for 5 seconds or more.
The operation of indoor/outdoor unit will stop.
(9)Replace the service port cap and both valve shaft caps tightly.
NOTE: *Wait more than 90 seconds after finishing pumpdown, and
turn off the circuit breaker off.
4
mm mm
Lo Hi
Stop valve
(gas side)
Stop valve
(liquid side)
Vacuume pump adapter
Service port
Hose
Compound
gauge
Gauge manifold
Service port
OPEN
Valve shaft cap
Hexagon socket screw key
SW 1 S W 1
UNIT D UNIT D
SW 2 S W 2
PUMP DOWN P UMP DOWN WIRE CHECK WIR E C HE C K
UNIT B UNIT B
LED 2 LE D 2
UNIT C UNIT C
UNIT A UNIT A
LED 1 LE D 1
LED 4 LE D 4 LED 3 LE D 3