Sharp AE-XM24CR (serv.man17) Service Manual ▷ View online
37
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
The ionizer inside the air conditioner will release cluster ions, which are
collective mass of positive and negative ions, into the room.
The cluster ions reduce airborne mold fungus and deodorize/decompose odor-
causing molecules.
collective mass of positive and negative ions, into the room.
The cluster ions reduce airborne mold fungus and deodorize/decompose odor-
causing molecules.
AIR CLEAN OPERATION
Cluster ions released into the air will reduce airborne mold fungus and deodorize/decompose
odor-causing molecules.
odor-causing molecules.
REFRESHING OPERATION
It is said that plenty of negative ions exist in places such as waterfalls or forests in natural
environment. In this operation mode, negative inos will be released in an increased rate, in order
to bring the room air close to this condition.
environment. In this operation mode, negative inos will be released in an increased rate, in order
to bring the room air close to this condition.
PLASMACLUSTER AUTO OPERATION
Dust sensor and odor sensor will detect foul air in the room.
Air Clean Operation will be performed for one minute after the air conditioner is operated to
detect foul air.
Air Clean Operation and Refreshing Operation will be selected and be performed automatically
depending on the air foul degree.
Air Clean Operation will be performed when the air is detected to be foul, Refreshing Operation
will be performed when the air is clean.
Air Clean Operation will be performed for one minute after the air conditioner is operated to
detect foul air.
Air Clean Operation and Refreshing Operation will be selected and be performed automatically
depending on the air foul degree.
Air Clean Operation will be performed when the air is detected to be foul, Refreshing Operation
will be performed when the air is clean.
SELF CLEAN OPERATION
Plasmacluster Operation will be performed with FAN or HEAT mode, in order to reduce the
growth of mold fungus, and dry inside of the air conditioner unit.
Utilize the operation at seasonal change over terms.
Mold fungus already grown can not be eliminated by this operation.
growth of mold fungus, and dry inside of the air conditioner unit.
Utilize the operation at seasonal change over terms.
Mold fungus already grown can not be eliminated by this operation.
Ionizer
Cluster ions
Mold fungus
Odor
Odor
TIPS ABOUT PLASMACLUSTER OPERATION
(only for models AY-XPM7CR/AY-XPM9CR/AY-XPM12CR)
38
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
2.OUTDOOR UNIT
2-1 FREQUENCY CONTROL
(1) AC current peak control
(1) AC current peak control
Cooling MODE
Heating MODE
14.0A
14.0A
(2) Prevention control of outdoor heat exchanger
overheating
If the temperature of the outdoor heat exchanger
exceeds the overheating prevention line 1or 2
during cooling, the operating frequency is
lowered by approximately 5 to 15Hz.
After that, the frequency is lowered
approximately 5Hz once every 60 seconds or
approximately 15Hz once every 120 seconds.
When the temperature of the outdoor heat
exchanger goes below the overheating
prevention clear line, the frequency is raised by
approximately 5Hz once every 60 seconds, and
normal operation is restored.
If the frequency is lowered to minimum
frequency without the temperature of the outdoor
heat exchanger decreasing and this condition
lasts for 1 minute, the compressor will be
stopped.
If the temperature of the outdoor heat exchanger
exceeds the overheating prevention line 1or 2
during cooling, the operating frequency is
lowered by approximately 5 to 15Hz.
After that, the frequency is lowered
approximately 5Hz once every 60 seconds or
approximately 15Hz once every 120 seconds.
When the temperature of the outdoor heat
exchanger goes below the overheating
prevention clear line, the frequency is raised by
approximately 5Hz once every 60 seconds, and
normal operation is restored.
If the frequency is lowered to minimum
frequency without the temperature of the outdoor
heat exchanger decreasing and this condition
lasts for 1 minute, the compressor will be
stopped.
Overheating Prevention line 1
Overheating Prevention line 2
Lower 5Hz once every 60 seconds
Lower 15Hz once every 120 seconds
Overheating Prevention clear line
55˚C
57˚C
54˚C
(3) Prevention control of compressor overheating
If the temperature of the compressor exceeds
approximately 108ÅãC, the operating frequency
is lowered approximately 5Hz.
After that, the frequency is lowered
approximately 5Hz once every 60 seconds.
When the compressor temperature drops below
approximately 108ÅãC, the frequency is raised
approximately 5Hz once every 60 seconds, and
normal operation is restored.
If the frequency is lowered to minimum
frequency without the temperature of the
compressor decreasing,and this condition lasts
for 1 minute, the compressor will be stopped.
approximately 108ÅãC, the operating frequency
is lowered approximately 5Hz.
After that, the frequency is lowered
approximately 5Hz once every 60 seconds.
When the compressor temperature drops below
approximately 108ÅãC, the frequency is raised
approximately 5Hz once every 60 seconds, and
normal operation is restored.
If the frequency is lowered to minimum
frequency without the temperature of the
compressor decreasing,and this condition lasts
for 1 minute, the compressor will be stopped.
(4) Prevention control of indoor heat exchanger
overheating
< for 2 minutes since 2room ON 1room ON >
If the temperature of any of indoor heat exchangers
exceeds the overheating prevention line 1 or 2
during heating, the operating frequency is lowered to
minimum frequency.
When the temperature of all of indoor heat
exchangers go below the overheating prevention
line 1, the frequency is raised by approximately 5Hz
once every 60 seconds, and normal operation is
restored.
If the condition that the frequency is minimum lasts
for 1 min, the compressor will be stopped.
If the temperature of any of indoor heat exchangers
exceeds the overheating prevention line 1 or 2
during heating, the operating frequency is lowered to
minimum frequency.
When the temperature of all of indoor heat
exchangers go below the overheating prevention
line 1, the frequency is raised by approximately 5Hz
once every 60 seconds, and normal operation is
restored.
If the condition that the frequency is minimum lasts
for 1 min, the compressor will be stopped.
< when normal >
If the temperature of any of indoor heat exchangers
exceeds the overheating prevention line 1 or 2
during heating, the operating frequency is lowered
by approximately 5 to 15Hz.
After that, the frequency is lowered approximately
5Hz once every 60 seconds or approximately 15Hz
once every 90 seconds.
When the temperature of all of indoor heat
exchangers go below the overheating prevention
line 1, the frequency is raised by approximately 5Hz
once every 60 seconds, and normal operation is
restored.
If the condition that the frequency is minimum lasts
for 1 min, the compressor will be stopped.
If the temperature of any of indoor heat exchangers
exceeds the overheating prevention line 1 or 2
during heating, the operating frequency is lowered
by approximately 5 to 15Hz.
After that, the frequency is lowered approximately
5Hz once every 60 seconds or approximately 15Hz
once every 90 seconds.
When the temperature of all of indoor heat
exchangers go below the overheating prevention
line 1, the frequency is raised by approximately 5Hz
once every 60 seconds, and normal operation is
restored.
If the condition that the frequency is minimum lasts
for 1 min, the compressor will be stopped.
2-2 OVER CURRENT PROTECTION
DC over current detection, AC over current
detection
To protect against over current due to sudden
change in load, the compressor is stopped if 55A
DC is exceeded in the DC section. If the set
value of AC current is exceeded in the AC
section, the compressor is stopped. 90 seconds
after the compressor has been stopped, another
starting try will be made.
Three retries are allowed. On the fourth retry, a
complete stop request signal is sent to the
indoor unit, and the outdoor unit will remain
stopped until the indoor operation is stopped.
DC over current is detected by the power
module. AC over current is detected by CT1, on
the outdoor PWB.
detection
To protect against over current due to sudden
change in load, the compressor is stopped if 55A
DC is exceeded in the DC section. If the set
value of AC current is exceeded in the AC
section, the compressor is stopped. 90 seconds
after the compressor has been stopped, another
starting try will be made.
Three retries are allowed. On the fourth retry, a
complete stop request signal is sent to the
indoor unit, and the outdoor unit will remain
stopped until the indoor operation is stopped.
DC over current is detected by the power
module. AC over current is detected by CT1, on
the outdoor PWB.
The set value of AC current
16.0A
Cooling mode
Heating mode
16.0A
When
ON
ON
When
OFF
OFF
Overheat
prevention line 2
prevention line 2
Overheat
prevention line 1
prevention line 1
Overheat
prevention line 2
prevention line 2
Overheat
prevention line 1
prevention line 1
~ 25Hz
25 ~
35Hz
35Hz
35 ~
95Hz
95Hz
95Hz ~
47.0˚C
45.0˚C
60.0˚C
57.0˚C
54.0˚C
52.0˚C
63.0˚C
59.0˚C
56.0˚C
54.0˚C
64.0˚C
60.0˚C
55.0˚C
53.0˚C
62.0˚C
58.0˚C
2-3 COMPRESSOR PROTECTION CONTROL
If the temperature of the compressor exceeds
113 ˚C, the compressor is stopped.
In this case, the outdoor fan is not stopped until the
temperature of compressor drops below 99ÅãC.
In 90 seconds after the compressor is stopped, if the
temperature is below 90ÅãC, another starting try will
be made. Three retries are allowed. On the fourth
retry, a complete stop request signal is sent to the
indoor unit, and the outdoor unit will remain stopped
until the indoor operation is stopped.
113 ˚C, the compressor is stopped.
In this case, the outdoor fan is not stopped until the
temperature of compressor drops below 99ÅãC.
In 90 seconds after the compressor is stopped, if the
temperature is below 90ÅãC, another starting try will
be made. Three retries are allowed. On the fourth
retry, a complete stop request signal is sent to the
indoor unit, and the outdoor unit will remain stopped
until the indoor operation is stopped.
39
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
2-4 POWER TRANSISTOR MODULE PROTECTION
If the temperature of the chips in the power
transistor module exceeds 100ÅãC, the compressor
is stopped.
In this case, the outdoor fan is not stopped until the
temperature of power module drops below 85ÅãC.
In 90 seconds after the compressor is stopped, if the
temperature is below 85ÅãC, another starting try will
be made. Three retries are allowed. On the fourth
retry, a complete stop request signal is sent to the
indoor unit, and the outdoor unit will remain stopped
until the indoor operation is stopped.
transistor module exceeds 100ÅãC, the compressor
is stopped.
In this case, the outdoor fan is not stopped until the
temperature of power module drops below 85ÅãC.
In 90 seconds after the compressor is stopped, if the
temperature is below 85ÅãC, another starting try will
be made. Three retries are allowed. On the fourth
retry, a complete stop request signal is sent to the
indoor unit, and the outdoor unit will remain stopped
until the indoor operation is stopped.
2-5 SERIAL SIGNALS
Serial signals consist of all 96-bit signals.
If the condition as outdoor unit unable to receive a
serial signal from the indoor unit continues for 30
seconds, it closes the expansion valve which
corresponds to the room which can not be
communicated.
If all indoor units can not communicate with the
outdoor unit, the compressor is stopped.
If the condition as outdoor unit unable to receive a
serial signal from the indoor unit continues for 30
seconds, it closes the expansion valve which
corresponds to the room which can not be
communicated.
If all indoor units can not communicate with the
outdoor unit, the compressor is stopped.
2-6 THERMISTOR OPEN OR SHORT
When compressor, heat exchanger, outdoor
thermistor, suction thermistor (CN8A) are in OPEN
or SHORT condition, even if they are in the condition
which an operation signal is transmitted from
indoors, the compressor will not start.
If any of the 2 suction thermistors (CN8B) become
OPEN or SHORT resistance, the protective
procedure will work only for the cycle corresponding
to the malfunctioning suction thermistor.
thermistor, suction thermistor (CN8A) are in OPEN
or SHORT condition, even if they are in the condition
which an operation signal is transmitted from
indoors, the compressor will not start.
If any of the 2 suction thermistors (CN8B) become
OPEN or SHORT resistance, the protective
procedure will work only for the cycle corresponding
to the malfunctioning suction thermistor.
2-7 MAIN RELAY
When the air-conditioners in all rooms stop, two
main relays of the outdoor unit will turn off.
main relays of the outdoor unit will turn off.
2-8 MISWIRING CHECK
"Miswiring check" is conducted by detecting the
indoor heat exchanger temp.
For example, when the expansion valve for only
room A is open, and the wiring is correct, the indoor
heat exchanger temp for room A will reduce.
If the wiring is incorrect, the indoor heat exchanger
temp for a different room will reduce.
indoor heat exchanger temp.
For example, when the expansion valve for only
room A is open, and the wiring is correct, the indoor
heat exchanger temp for room A will reduce.
If the wiring is incorrect, the indoor heat exchanger
temp for a different room will reduce.
2-9 SAFETY TIME
When the unit is operated by the remote control after
the breaker is turned on, the safety device of the
compressor will work and the compressor will not
operate for 90 seconds.
the breaker is turned on, the safety device of the
compressor will work and the compressor will not
operate for 90 seconds.
2-10 PUMP DOWN SWITCH
When the PUMP DOWN SWITCH (SW51) is
pressed for 5 seconds or more, the total A/C
system will start its TEST RUN automatically and
the compressor frequency will be 55 Hz.
When operating only the outdoor unit (cooling 55
Hz fixed mode) To make only the outdoor unit run
incooling mode, and apply a voltage of 230 V AC
to L and N on the terminal board and push the
pump down switch. (SW51) (Avoid operating the
outdoor unit alone for long periods of time.)
pressed for 5 seconds or more, the total A/C
system will start its TEST RUN automatically and
the compressor frequency will be 55 Hz.
When operating only the outdoor unit (cooling 55
Hz fixed mode) To make only the outdoor unit run
incooling mode, and apply a voltage of 230 V AC
to L and N on the terminal board and push the
pump down switch. (SW51) (Avoid operating the
outdoor unit alone for long periods of time.)
2-11CONTROL OF COMPRESSOR OR AND
EXPANSION VALVE
For 90 seconds after turning on the AC power, the
compressor will not be activated even if indoor units
request the compressor to do so. If the compressor
receives a request from one or more indoor units
after 90 seconds have passed, it will be turned on
and the expansion valve corresponding to the
requesting indoor unit will be opened.
When the indoor unit of a room requests for the
cooling operation to the outdoor unit and it runs
responding to the request, requests for the heating
can't be accepted if the indoor units in other rooms
send individual requests.
If the indoor unit in another room sends a request for
the heating operation, the operation lamp and timer
lamp of the indoor unit in that room start flashing in
turn to inform that the unit is in the standby mode.
If the operation in one room is stopped while the
indoor unit in another room is in the stand-by mode,
the operation mode requested by the indoor unit
which is now in the stand-by mode will be accepted.
At this time, the compressor will be temporarily
stopped to switch the four- way valve and restart
after 90 seconds.
During the cooling or dry operation, the
expansion valve corresponding to the indoor unit
that is not running is closed. Therefore, th refrigerant
will not flow into those units.However,if the heating
operation is in progress, it is possible that it flows
into indoor units which are out of operation
depending on the cycle conditions. As a result, the
indoor exchanger may be heated up even if it
For 90 seconds after turning on the AC power, the
compressor will not be activated even if indoor units
request the compressor to do so. If the compressor
receives a request from one or more indoor units
after 90 seconds have passed, it will be turned on
and the expansion valve corresponding to the
requesting indoor unit will be opened.
When the indoor unit of a room requests for the
cooling operation to the outdoor unit and it runs
responding to the request, requests for the heating
can't be accepted if the indoor units in other rooms
send individual requests.
If the indoor unit in another room sends a request for
the heating operation, the operation lamp and timer
lamp of the indoor unit in that room start flashing in
turn to inform that the unit is in the standby mode.
If the operation in one room is stopped while the
indoor unit in another room is in the stand-by mode,
the operation mode requested by the indoor unit
which is now in the stand-by mode will be accepted.
At this time, the compressor will be temporarily
stopped to switch the four- way valve and restart
after 90 seconds.
During the cooling or dry operation, the
expansion valve corresponding to the indoor unit
that is not running is closed. Therefore, th refrigerant
will not flow into those units.However,if the heating
operation is in progress, it is possible that it flows
into indoor units which are out of operation
depending on the cycle conditions. As a result, the
indoor exchanger may be heated up even if it
is not
activated. This is not abnormal.
When the operations in all rooms are stopped, the
compressor is off and the expansion valves in all
rooms are fully opened.
When the operations in all rooms are stopped, the
compressor is off and the expansion valves in all
rooms are fully opened.
2-12 DEFROST OPERATION
(1) Overview
(1) Overview
Defrosting begins during heating if the conditions for
compressor operation time and outdoor heat
exchanger temperature are met. When defrosting
begins, the indoor and outdoor fans stop.
Defrosting stops when the temperature of the
outdoor heat exchanger goes above approximately
15 ˚C or defrosting time exceeds 10 minutes.
compressor operation time and outdoor heat
exchanger temperature are met. When defrosting
begins, the indoor and outdoor fans stop.
Defrosting stops when the temperature of the
outdoor heat exchanger goes above approximately
15 ˚C or defrosting time exceeds 10 minutes.
Defrost
mask time
Defrost
mask time
Defrost
mask time
Heating
begins
Defrosting
Max. 10 min.
Defrosting
Max. 10 min.
40
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
(2) Defrosting
If the compressor operation time is more than 20
minutes in the heating mode and the outdoor air
temperature and outdoor heat exchange
temperature satisfy the defrosting conditions, the
defrosting operation is started.
When the defrosting operation is started, the indoor
fan starts to run intermittently.
When the outdoor heat exchanger temperature
reaches approx. 15 ˚C or above or when the
defrosting time exceeds 10minutes, the defrosting
operation is quit.
minutes in the heating mode and the outdoor air
temperature and outdoor heat exchange
temperature satisfy the defrosting conditions, the
defrosting operation is started.
When the defrosting operation is started, the indoor
fan starts to run intermittently.
When the outdoor heat exchanger temperature
reaches approx. 15 ˚C or above or when the
defrosting time exceeds 10minutes, the defrosting
operation is quit.
(3) During defrosting
When defrosting begins, the compressor stops.
Approximately 1 minutes later, the compressor
reactivates in the refrigeration cycle, and the outdoor
heat exchanger is defrosted.
Each mode is as follows:
The outdoor fan is stopped
The operating frequency is as shown in the
table below
The indoor fan is stopped
All expontion valve are open.
Approximately 1 minutes later, the compressor
reactivates in the refrigeration cycle, and the outdoor
heat exchanger is defrosted.
Each mode is as follows:
The outdoor fan is stopped
The operating frequency is as shown in the
table below
The indoor fan is stopped
All expontion valve are open.
(4) Defrost stop
When defrosting time exceeds 10 minutes
When the temperature of the outdoor heat
exchanger rises above approximately 15 ˚C
Defrost stop is determined by either of the
above conditions, and the compressor is
stopped.
At the same time, the outdoor fan go ON.
The compressor is reactivated in the heating
cycle 1 minutes after it was stopped, and
normal control resumes.
When the temperature of the outdoor heat
exchanger rises above approximately 15 ˚C
Defrost stop is determined by either of the
above conditions, and the compressor is
stopped.
At the same time, the outdoor fan go ON.
The compressor is reactivated in the heating
cycle 1 minutes after it was stopped, and
normal control resumes.
2-13 PREHEAT
Preheat operation is that supplies a small
amount of power to the compressor to make
heating start more quickly.
When outdoor temperature lowers below 5 ˚C
and compressor temperature lowers below
20 ˚C, Preheat Operation starts.
After that, if outdoor temperature rises 8 ˚C or
compressor temperature rises 25 ˚C, Preheat
Operation stops.
amount of power to the compressor to make
heating start more quickly.
When outdoor temperature lowers below 5 ˚C
and compressor temperature lowers below
20 ˚C, Preheat Operation starts.
After that, if outdoor temperature rises 8 ˚C or
compressor temperature rises 25 ˚C, Preheat
Operation stops.
More than
20 min.
More than
20 min.
Defrosting
Max. 10 min.
Max. 10 min.
Heating
operation
start
operation
start
Defrosting
Max. 10 min.
Max. 10 min.
More than
20 min.
AE-XM18CR/AE-XM24CR
Model
Frequency
90Hz
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