AH/AU-X108E
AY/AE-X108E
AH/AU-X138E
AY/AE-X138E
(2) Defrosting conditions
Overheating prevention line
The temperature of the outdoor heat exchanger and
the temperature of the outdoor are detected by 2Operating frequencyAbove50 to43 toBelow
50 Hz43 Hz37 Hz37 Hz
sensors, and if it stays in the preset defrost zone for
During normal operation54535251
approximately 120 seconds, defrosting start is
enabled.During full power operation58575654
If defrosting is enabled when the defrost mask time
ends, defrosting is performed. If defrosting is not(3)Control for prevention of outdoor heat exchanger
enabled, the machine waits until defrosting is enabled.overheating
Defrost mask times is 20 minutes.If the temperature of the outdoor heat exchanger
The defrosting zone is decided by outdoorexceeds approximately 60°C during cooling, the
temperature and outdoor heat exchangeroperating frequency is lowered by approximately 5 to
20 Hz. After that, the frequency is lowered by
temperature.
approximately 5 to 10 Hz once every 120 seconds.
(3) During defrostingWhen the temperature of the outdoor heat exchanger
When defrosting begins, the compressor stops.goes below approximately 57uC, the frequency is
Approximately 1 minutes later, the compressorraised by approximately 5 Hz once every 60 seconds,
reactivates in the refrigeration cycle, and the outdoorand normal operation is restored.
heat exchanger is defrosted.If the frequency is lowered to minimum frequency
without the temperature of the outdoor heat exchanger
Each mode is as follows:
The outdoor fan is stoppeddecreasing and this condition lasts for 1 minute, the
compressor will be stopped.
The operating frequency is 90Hz/76Hz [AY-X138E/
AY-X108E]
(4) Control for prevention of discharge overheating
The indoor fan is stopped
If the discharge temperature exceeds approximately
(4) Defrost stop105°C during compressor operation, the operating
When defrosting time exceeds 12 minutesfrequency is lowered by approximately 5 Hz. After
that, the frequency is lowered by approximately 5 Hz
When the temperature of the outdoor heat exchanger
rises above approximately 10uConce every 60 seconds. When the temperature of the
Defrost stop is determined by either of the aboveoutdoor heat exchanger goes below approximately
conditions, and the compressor is stopped.104uC, the frequency is raised by approximately 5 Hz
At the same time, the outdoor fan go ON. Theonce every 60 seconds, and normal operation is
restored.
compressor is reactivated in the heating cycle 1
minutes after it was stopped, and normal controlIf the frequency is lowered to minimum frequency
without the discharge temperature decreasing and this
resumes.
condition lasts for 1 minute, the compressor will be
stopped.
2-2 Frequency control
(1) AC current peak control(5)Control for prevention of indoor heat exchanger
This control lowers the compressor frequency if the
freezing
AC current exceeds the set values. If the current isIf the temperature of the indoor heat exchanger goes
below the set values, the compressor frequency will
below approximately 5°C during cooling, the operating
not be raised above that frequency, as the maximumfrequency is lowered by approximately 5 Hz. After
frequency, for 1 minute.
that, the frequency is lowered by approximately 5 Hz
once every 60 seconds. When the temperature of the
ModelSet value
indoor heat exchanger rises above approximately 5°C,
AE-X108EDuring heating Approximately 8.00 A
the frequency is raised by approximately 5 Hz once
AE-X138EDuring heating Approximately 10.14 Aevery 60 seconds, and normal operation is restored.
AE-X108E, AU-X108EDuring cooling Approximately 6.15AIf the temperature of the indoor heat exchanger goes
AE-X138E, AU-X138EDuring cooling Approximately 7.50 Adown to approximately 0°C and this condition
continues for 4 minutes, the compressor is stopped.
(2)Control for prevention of indoor heat exchangerWhen the temperature rises above approximately 2uC,
overheatingnormal operation is restored.
If the temperature of the indoor heat exchanger
exceeds the overheating prevention line during2-3 Overcurrent protection
heating due to the operating frequency or the nature(1) Compressor lock detection
of the operation, the frequency is lowered byIf the set value (4.37 A: AE-X138E, AU-X138E / 3.83
approximately 5 to 10 Hz. After that, the frequency isA: AE-X108E, AU-X108E) of AC current is exceeded
lowered by approximately 5 to 10 Hz once every 60at 10 to 30 Hz when operation begins, operation is
seconds. When the temperature of the indoor heatstopped. In this case, the compressor and outdoor fan
exchanger goes below the overheating preventiondoes not stop, and 170 seconds after operation is
line, the frequency is raised by approximately 5 Hzstopped, another try will be made. Three retries are
once every 60 seconds, and normal operation isallowed. On the fourth retry, a complete stop request
restored.signal is sent to the indoor unit, and the outdoor unit
If the frequency is lowered to minimum frequencywill remain stopped until reset is performed. At this
without the temperature of the indoor heat exchangertime, the 3-minute delay for control of the outdoor unit
decreasing and this condition lasts for 1 minute, thewill not function; therefore, do not cancel by removing
compressor will be stopped.the plug and cutting the power.
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ACEC
