AH-X075E/X095E
AU-X075E/X095E
AY-X075E/X095E
AE-X075E/X095E
2-2 Frequency control
(1) AC current peak control
This control lowers the compressor frequency if the AC current exceeds the set values. If the current is below the set
values, the compressor frequency will not be raised above that frequency, as the maximum frequency, for 1 minute.
ModelSet value
AE-X095E,AU-X095EDuring heatingApproximately 7.0 A
AE-X075E,AU-X075EDuring coolingApproximately 6.5 A
(2) Control for prevention of indoor heat exchanger overheating
If the temperature of the indoor heat exchanger exceeds the overheating prevention line during heating due to the
operating frequency or the nature of the operation, the frequency is lowered by approximately 5 to 10 Hz. After that, the
frequency is lowered by approximately 5 to 10 Hz once every 60 seconds. When the temperature of the indoor heat
exchanger goes below the overheating prevention line, the frequency is raised by approximately 5 Hz once every 60
seconds, and normal operation is restored.
If the frequency is lowered to 35 Hz without the temperature of the indoor heat exchanger decreasing and this condition
lasts for 1 minute, the compressor will be stopped.
Overheating prevention line
Operating frequency
Above 50 Hz50 to 43 Hz43 to 37 HzBelow 37 Hz
During normal operation54535251
During full power operation57565554
(3) Control for prevention of outdoor heat exchanger overheating
If the temperature of the outdoor heat exchanger exceeds approximately 57°C during cooling, the operating frequency
is lowered by approximately 5 to 15 Hz. After that, the frequency is lowered by approximately 5 to 10 Hz once every 60
seconds. When the temperature of the outdoor heat exchanger goes below approximately 55uC, the frequency is raised
by approximately 5 Hz once every 60 seconds, and normal operation is restored.
If the frequency is lowered to 35 Hz 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 temperature of the outdoor heat exchanger goes below approximately 104uC, the frequency is raised by
approximately 5 Hz once every 60 seconds, and normal operation is restored.
If the frequency is lowered to 35 Hz without 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, 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 2uC, normal operation is
restored.
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ACEC
