Pump Down - Sharp AH-PN10 Operation Manual

DETACHING THE UNIT FROM THE MOUNTING PLATE
Push the " " marks at the bottom of the indoor unit
and pull the bottom of the unit. When the hooks are
released from the mounting plate, support the bottom
of the unit and lift the unit upwards.

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.
PROCEDURE USING GAUGE MANIFOLD (Recommended procedure)
(1) Connect the gauge manifold hose to the service
port of the 3-way valve.
(2) Run the air conditioner at cooling test run mode
(Refer to 10 TEST RUN).
(3) After 5-10 minutes, close the 2-way valve.
(4) Close the 3-way valve when the compound gauge
reading becomes almost 0 MPa(0 cmHg).
(5) Stop the test run operation.
(6) Disconnect the gauge manifold hose from the service port.
(7) Disconnect both refrigerant pipes.
PROCEDURE WITHOUT USING GAUGE MANIFOLD
(1) Run the air conditioner at cooling test run mode (Refer to TEST RUN).
(2) After 5-10 minutes, fully close the 2-way valve by turning the hexagon wrench.
(3) After 2-3 minutes, immediately close the 3-way valve fully.
(4) Stop the test run operation.
(5) Disconnect both refrigerant pipes.
CUTIONS:
• 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.
OM_AH-PN10 13GY_EN.indd Sec1:24 OM_AH-PN10 13GY_EN.indd Sec1:24
2-way valve
3-way valve
E-24
" " mark.
Gauge manifold
Lo Hi
Compound
gauge
Service port
12/22/11 6:30:41 PM 12/22/11 6:30:41 PM