AH-X13 (serv.man7). Functions - Sharp Air Conditioner Service Manual (repair manual). Page 5

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(4) Defrost stop

When defrosting time exceeds 13 minutes When the temperature of the outdoor heat exchanger rises above
approximately 7˚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 minute after it was
stopped, and normal control resumes.

2-2 Frequency control
(1) AC current peak control

(2) Control for prevention of indoor heat exchanger overheating.

If the temperature of the indoor heat exchanger exceeds the overheating prevention line 1 or 2 during heating, the
operating frequency is lowered by approximately 5 to 10 Hz. After that, the frequency is lowered by approximately
5Hz once every 60 seconds or 10 Hz once every 60 seconds. When the temperature of the indoor heat exchanger
goes below the overheating prevention line 1, the frequency is raised by approximately 5 Hz 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.

(3) Control for prevention of outdoor heat exchanger overheating.

If the temperature of the outdoor heat exchanger exceeds the overheating prevention line 1 or 2 during cooling, the
operating frequency is lowered by approximately 5 to 15 Hz.
After that, the frequency is lowered by approximately 5 once every 60 seconds or approximately 15Hz once every
60 seconds. When the temperature of the outdoor heat exchanger goes below the overheating prevention clear
line, the frequency is raised by approximately 5 Hz 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.

4)

Control for prevention of discharge overheating
If the discharge temperature exceeds approximately 105

°

C during compressor operation, the operating frequency

is lowered by approximately 5 Hz.  After that, the frequency is lowered by approximately 5 Hz once every 60
seconds. When the discharge temperature goes below approximately 104

°

C, the frequency is raised by approximately

5 Hz once every 60 seconds, and normal operation is restored.
If the frequency is lowered to minimum frequencywithout the discharge temperature decreasing and this condition
lasts for 1 minute, the compressor will be stopped.

(5) Control for prevention of indoor heat exchanger freezing

If the temperature of the indoor heat exchanger goes below approximately 5

°

C during cooling(only Full power

operation), the operating frequency is lowered by approximately 5 Hz.  After that, the frequency is lowered by
approximately 5 Hz once every 60 seconds. When the temperature of the indoor heat exchanger rises above
approximately 5

°

C, the frequency is raised by approximately 5 Hz once every 60 seconds, and normal operation is

restored.
If the temperature of the indoor heat exchanger goes down to approximately 0

°

C and this condition continues for

4 minutes, the compressor is stopped.
When the temperature rises above approximately 2˚C, normal operation is restored.

M o d e l

S e t   v a l u e

C o o l

H e a t

6 . 2 A

6 . 7 A

5 . 3 A

5 . 4 A

7 . 9 A

1 0 . 5 A

A E - X 0 8 C R

A E - X 1 0 C R

A E - X 1 3 C R

M o d e l

S e t   v a l u e

C o o l

5 . 3 A

6 . 2 A

7 . 9 A

A U - X 0 8 C R

A U - X 1 0 C R

A U - X 1 3 C R

55˚C
57˚C
54˚C

Lower 5Hz once every 60 seconds
Lower 15Hz once every 60 seconds

Overheating prevention line 1
Overheating prevention line 2
Overheating prevention clear line

Overheating prevention line 1 (Lower 5Hz)

44.84

47.39

AE-X08CR
AE-X10CR
AE-X13CR

[˚C]

[˚C]

130Hz ~

44.84

47.39

51.87

50.95

105Hz ~

112Hz

112Hz ~

130Hz

53.29

54.26

97Hz ~

105Hz

54.26

57.27

50Hz ~

97Hz

53.29

55.74

 43Hz ~

50Hz

52.34

54.75

37Hz ~

43Hz

   ~ 37Hz

AE-X08CR
AE-X10CR
AE-X13CR

130Hz ~

105Hz ~

112Hz

112Hz ~

130Hz

97Hz ~

105Hz

50Hz ~

97Hz

 43Hz ~

50Hz

37Hz ~

43Hz

   ~ 37Hz

44.84

46.53

Operating frequency

During normal operation
During full power operation

Overheating prevention line 2 (Lower 10Hz)

49.59

51.87

[˚C]

[˚C]

49.59

51.87

53.29

53.74

56.25

58.85

57.27

59.94

56.25

58.85

55.24

57.27

47.39

49.14

Operating frequency

During normal operation
During full power operation