Sharp AE-XM24CR (serv.man17) Service Manual ▷ View online
49
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
2
Yes
Yes
No
Yes
No
No
No
Yes
No
No
Yes
Yes
Short circuit of the thermistor error
Open circuit of the thermistor error
Is the resistance value of the
thermistor for UNIT A (TH5),
UNIT B (TH6) or UNIT C (TH7)
Open circuit of serial signal line
Short circuit of serial signal line
When one room is not cooled (other rooms are cooled)
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
Press the OPERATION
button to start operating
the air-conditioner.
(Set the cooling mode
to 18˚C.)
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
Check that the power
between the terminal
board "N" and "1" of the
indoor unit is AC 230V.
Repair the wiring
between the units.
Replace the indoor
control PWB.
Replace the thermistor.
Check the failure
symptom with the failure
diagnosis mode.
Replace the outdoor control
PWB
or the exppansion valve (UNIT A)
or the exppansion valve (UNIT B)
or the exppansion valve (UNIT C)
Is the resistance value of the
winding in the fan motor
∞
?
(Between 1 and 3 of CN1)
Abnormal fan motor of
indoor unit
The thermal fuse is blown.
The motor is locked.
Replace the indoor fan motor.
Is the wiring between the
units connected by mistake
or broken ?
Repair the wiring between
the units.
Replace the indoor control PWB.
50
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
3 When all rooms are not heated
Does the air get cooler in the
cooling operation mode?
cooling operation mode?
Check the four-way valve.
Has the cycle been switched?
Has the cycle been switched?
Replace the outdoor
relay PWB.
relay PWB.
Is AC230V applied between
the connector(CN4) 1 and 3
of the 4-way valve ?
the connector(CN4) 1 and 3
of the 4-way valve ?
Replace the four-way valve.
Pressure check
The heating cycle is normal.
Refer to (1) All rooms are
not cooled.
not cooled.
Press the ON switch on the
remote control to run the air
conditioner.
Set the temperature to 32˚C
in the heating mode and
start operation.
remote control to run the air
conditioner.
Set the temperature to 32˚C
in the heating mode and
start operation.
Is the outdoor compressor
running?
running?
Yes
Yes
Yes
Yes
No
No
No
51
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
REFRIGERATION CYCLE
Figure R-1. Refrigeration Cycle
Figure R-2. Flow of Refrigerant
INDOOR UNIT
OUTDOOR UNIT
UNIT C
UNIT B
UNIT A
(AE-XM24CR only)
Cooling
Heating
Heat exchanger
Heat exchanger
Heat exchanger
INDOOR UNIT
OUTDOOR UNIT
UNIT C
UNIT B
UNIT A
Expansion
valve A
valve A
Expansion
valve B
valve B
Expansion
valve C
valve C
Stop valve (Liquid)
Stop valve (Gas)
Heat exchanger
Accumulator
4-way valve
Compressor
(AE-XM24CR only)
3
3
3
4
1
2
52
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
Cycle temperature and pressure in stop valve
Standard conditions
Running
unit
Operation
mode
No.
Cool
(Max)
Cool
(Test run)
Heat
(Max)
Heat
(Test run)
78
69
92
60
40
39
20
9
11
13
36
27
16
19
2
5
Stop valve pressure
(gas side)
1.05MPa(abs)
1.15MPa(abs)
3.25MPa(abs)
2.20MPa(abs)
9000
&
9000
(2 units)
Frequency
Stop valve pressure
(gas side)
Frequency
80.0Hz
50.6Hz
111.7Hz
52.1Hz
79
66
102
52
37
37
17
7
10
13
42
29
11
18
5
7
0.93MPa(abs)
1.15MPa(abs)
3.95MPa(abs)
2.50MPa(abs)
12000
(1 units)
70.0Hz
36.7Hz
90.0Hz
40.4Hz
73
66
86
59
37
36
13
7
9
13
37
27
14
21
6
6
1.00MPa(abs)
1.15MPa(abs)
3.60MPa(abs)
2.45MPa(abs)
9000
(1 units)
51.7Hz
27.7Hz
70.0Hz
35.0Hz
70
66
77
53
36
36
10
7
10
13
34
26
15
21
6
7
1.04MPa(abs)
1.16MPa(abs)
3.30MPa(abs)
2.50MPa(abs)
7000
(1 units)
41.7Hz
24.2Hz
58.3Hz
31.9Hz
Indoor side
Outdoor side
Dry-bulb
temp (˚C)
Relative
humidity (%)
Dry-bulb
temp (˚C)
Relative
humidity (%)
Cooling
27
47
35
40
Heating
20
7
87
Stop valve pressure
Stop valve pressure
(gas side)
(gas side)
Frequency
Frequency
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