Sharp AE-XM18CR (serv.man15) Service Manual ▷ View online
57
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
Piping
REFRIGERANT PIPE INSTALLATION WORKS
Air-removong
Use an adapter for preventing vacuum pump oil from
flowing back to the gauge
manifold hose. ON/OFF operation of the vacuum pump
should be made by theS
adapter switch.
(1) Remove both valve shaft caps of the stop valves.
(2) Remove the service port cap of the stop valve (gas
flowing back to the gauge
manifold hose. ON/OFF operation of the vacuum pump
should be made by theS
adapter switch.
(1) Remove both valve shaft caps of the stop valves.
(2) Remove the service port cap of the stop valve (gas
side).
(3) Connect the gauge manifold hose to the service port
and the vacuum pump. Be sure that the hose end to
be connected to the service port has a valve core
pusher.
be connected to the service port has a valve core
pusher.
(4) Open the gauge manifold valve and operate the
vacuum pump for 10-15 minutes. Make sure the
compound gauge reads -0.1MPa(-76cmHg).
compound gauge reads -0.1MPa(-76cmHg).
(5) Close the gauge manifold valve.
(6) Turn off the vacuum pump.
(7) Fully open the stop valve (liquid side) with hexagon
(6) Turn off the vacuum pump.
(7) Fully open the stop valve (liquid side) with hexagon
socket screw key. Turn all the way up to contact.
(8) Fully open the stop valve (gas side) with hexagon
socket screw key. Turn all the way up to contact.
(9) Disconnect the gauge manifold hose from the service
port.
(10) Replace the service port cap and both valve shaft
caps tightly. Turn until the torque suddenly increases.
Now tighten a 1/6-turn more.
Now tighten a 1/6-turn more.
Notes:
• Use a gauge manifold and hoses exclusive for R410A.
• After air removal, check the tube connections for gas
leak using a leakage detector or soapy water. Regarding
leakage detector, use high-sensitivity type designed
specially for R410A.
• When opening the valve with a hexagon socket screw
key, some refrigerant might be let out. This is not a
system trouble.
• Use a gauge manifold and hoses exclusive for R410A.
• After air removal, check the tube connections for gas
leak using a leakage detector or soapy water. Regarding
leakage detector, use high-sensitivity type designed
specially for R410A.
• When opening the valve with a hexagon socket screw
key, some refrigerant might be let out. This is not a
system trouble.
4
mm
mm
Service port
Service port
Hexagon socket screw key
Hexagon socket screw key
Valve shaft cap
Valve shaft cap
OPEN
OPEN
Lo
Hi
Stop valve
(gas side)
(gas side)
Stop valve
(liquid side)
(liquid side)
Vacuume pump adapter
Service port
Hose
Compound
gauge
gauge
Gauge manifold
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 (AE-XM18CR:LED51,52 /
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 (AE-XM18CR:LED51,52 /
AE-XM24CR:LED50,51,52) on the display board unit
are flashing synchronously in a slow (one flash per
second) cycle.
are flashing synchronously in a slow (one flash per
second) cycle.
(3) Stop the air conditioner operation and connect the
gauge manifold (compound gauge side) hose to the
service port of the stop valve (gas side).
service port of the stop valve (gas side).
(4) Remove the air in the hose by loosening screw a
shown in the figure below.
(5) Press the PUMP DOWN SWITCH (SW51) 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.)
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 minutes, fully close the stop valve (liquid side)
by turning the hexagon socket screw key clockwise.
(7) Close the stop valve (gas side) to half closed position.
(8) Keep running the air conditioner for 40~60 seconds.
(8) Keep running the air conditioner for 40~60 seconds.
When the pressure of the compound gauge reads
0.05MPa(0.5kgf/cm
0.05MPa(0.5kgf/cm
2
), immediately close the stop
valve (gas side) fully.
(9) Press the PUMP DOWN SWITCH (SW51) on the
display board unit for 5 seconds or more.
The operation of indoor/outdoor unit will stop.
The operation of indoor/outdoor unit will stop.
(10)Disconnect the gauge manifold hose from the service
port.
(11)Replace the service port cap and both valve shaft
caps tightly.
Notes:
•
•
Wait more than 90 seconds after finishing pump
down, and turn off the circuit breaker off.
down, and turn off the circuit breaker off.
•
If the air conditioner pressure drops below
0.05MPa(0.5kgf/cm
0.05MPa(0.5kgf/cm
2
), indoor unit side becomes
negative pressure. As
a result, moisture or dust in the air will enter into the
indoor unit. Therefore, stop the air conditioner when
pressure is between 0.05~0MPa(0.5~0kgf/cm
a result, moisture or dust in the air will enter into the
indoor unit. Therefore, stop the air conditioner when
pressure is between 0.05~0MPa(0.5~0kgf/cm
2
).
Max. piping length A
Max. total piping length
of all unit
Max. level difference B
AE-XM18CR
20m
30m
10m
AE-XM24CR
20m
40m
10m
B
B
TRAP
OUTDOOR
UNIT
UNIT
INDOOR UNIT
A
a. When the outdoor unit is placed at
a higher level than the indoor
units, provide a trap near the
hose’s lead-in port.
a higher level than the indoor
units, provide a trap near the
hose’s lead-in port.
58
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
MISWIRING CHECK
Miswiring check must be performed after installation, re-
installation and service.
This multi-type air conditioner is designed with a WIRE
CHECK SWITCH on the outdoor unit, and miswiring of
unit-to-unit wiring will be self-corrected by microcomputer.
Miswiring check may not be performed when the outdoor
temperature is below 5˚C.
(1) Complete the unit-to-unit wiring/piping and perform the
installation and service.
This multi-type air conditioner is designed with a WIRE
CHECK SWITCH on the outdoor unit, and miswiring of
unit-to-unit wiring will be self-corrected by microcomputer.
Miswiring check may not be performed when the outdoor
temperature is below 5˚C.
(1) Complete the unit-to-unit wiring/piping and perform the
air removing of the pipes. Turn the electrical circuit
breaker ON. Before turning the circuit breaker ON,
make sure no one is working on the indoor units
installation. Electrical shock or injury may occur.
breaker ON. Before turning the circuit breaker ON,
make sure no one is working on the indoor units
installation. Electrical shock or injury may occur.
(2) Check that all LED (AE-XM18CR:LED51,52/AE-
XM24CR:LED50,51,52) on the display board unit are
flashing synchronously in a slow (one flash per
second) cycle. If either one or more of all LED is/are
kept lighted on, check and correct the wrong wirings
among , N, 1, 2, terminals so that all LED will flash
slowly, showing normal
condition.
flashing synchronously in a slow (one flash per
second) cycle. If either one or more of all LED is/are
kept lighted on, check and correct the wrong wirings
among , N, 1, 2, terminals so that all LED will flash
slowly, showing normal
condition.
(3) Press the WIRE CHECK SWITCH (SW50) on the
display board unit for 5 seconds or more. The flashing
of all LED will change. Miswiring (mispiping) check will
start and the indoor and outdoor units will start
operating. (The red operation lamp on the indoor unit
will flash, and three BEEP will be emitted. ) Miswiring
of unit-to-unit wiring will be self-corrected.
of all LED will change. Miswiring (mispiping) check will
start and the indoor and outdoor units will start
operating. (The red operation lamp on the indoor unit
will flash, and three BEEP will be emitted. ) Miswiring
of unit-to-unit wiring will be self-corrected.
(4) Wrong piping works cannot be corrected, and will be
detected as an error. When an error is detected during
checking, all LED will show triple flash for eight times.
The indoor and outdoor operation will stop. Turn the
circuit breaker OFF and check and correct the
miswiring (mispiping)*. After correction, return to step
1 and repeat the miswiring (mispiping) check again. If
error is still detected, or other types of LED signal
should be indicated, please contact a service
technician. (Refer to wiring diagram attached inside
the outdoor unit cabinet for
self diagnosis signal.)
checking, all LED will show triple flash for eight times.
The indoor and outdoor operation will stop. Turn the
circuit breaker OFF and check and correct the
miswiring (mispiping)*. After correction, return to step
1 and repeat the miswiring (mispiping) check again. If
error is still detected, or other types of LED signal
should be indicated, please contact a service
technician. (Refer to wiring diagram attached inside
the outdoor unit cabinet for
self diagnosis signal.)
(5) All LED (AE-XM18CR:LED51,52/AE-XM24CR:
LED50,51,52) will flash synchronously in a slow (one
flash per second) cycle when miswiring (mispiping)
check is completed with no error detection (3~6
minutes), and the operation of indoor and outdoor
units will stop .(The red operation lamp flashing on
the indoor unit will go off.)
flash per second) cycle when miswiring (mispiping)
check is completed with no error detection (3~6
minutes), and the operation of indoor and outdoor
units will stop .(The red operation lamp flashing on
the indoor unit will go off.)
(6) Place the control box cover back in the reverse order.
AUX.
Lo
Hi
a
SW51
SW51
UNIT B
UNIT B
UNIT C
UNIT C
SW50
SW50
PUMP DOWN
PUMP DOWN
WIRE CHECK
WIRE CHECK
LED51
LED51
UNIT A
UNIT A
LED52
LED52
LED50
LED50
Stop valve
(gas side)
(gas side)
Stop valve
(liquid side)
(liquid side)
Service port
Hose
Compound
gauge
gauge
Gauge manifold
SW51
SW51
UNIT B
UNIT C
SW50
SW50
PUMP DOWN
PUMP DOWN
WIRE CHECK
WIRE CHECK
(UNIT C : AE-X24CR only)
LED51
LED51
UNIT A
UNIT A
LED52
LED52
LED50
LED50
TEST RUN
(1) Open the open panel to see the control section.
(2) Start the operation with the remote control.
(3) Press the " AUX. " button on the unit for 5 seconds or
(2) Start the operation with the remote control.
(3) Press the " AUX. " button on the unit for 5 seconds or
the cooling operation and select the heating mode on
the remote control.
the remote control.
button again to stop the operation
Display
