AH-X127E
AU-X127E
AY-X127E
AE-X127E
23
2. OUTDOOR UNIT
2-1 Defrost operation
(1) Overview
Defrosting begins during heating if the conditions for compressor operation time and the defrosting zone are met.
When defrosting begins, the indoor and outdoor fans stop.
Defrosting stops when the temperature of the outdoor heat exchanger goes above approximately 10˚C or defrosting
time exceeds 13 minutes.
AU-X127E is not provided with the heating function.
(2) Defrosting conditions
The temperature of the outdoor heat exchanger and the temperature of the outdoor are detected by 2 sensors, and if
it stays in the preset defrost zone for approximately 40 seconds, defrosting start is enabled.
If defrosting is enabled when the defrost mask time ends, defrosting is performed. If defrosting is not enabled, the
machine waits until defrosting is enabled.
Defrost mask times is 20 minutes.
The defrosting zone is decided by outdoor temperature
and outdoor heat exchanger temperature.
(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 115Hz
The indoor fan is stopped
(4) Defrost stop
When defrosting time exceeds 13 minutes
When the temperature of the outdoor heat exchanger rises above approximately 10˚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.
Defrost
mask time
Defrost
mask time
Defrost
mask time
Heating
begins
Defrosting
Max. 13 min.
Defrosting
Max. 13 min.
