High temperature cut-off protection: When the indoor coil temperature higher than T_CPS
(68ć) and maintains for 10 seconds, both the compressor and outdoor fan stop, and the
indoor fan operates as the thermostat is Off. The compressor will not restart in 3 minutes
until the coil temperature lower than T_CP R(50ć).
4. Double-unit heating operation
4.1 When the double-unit’s indoor unit gives out a heating signal, outdoor compressor A
starts heating operation. During the operation, outdoor compressor A and the 4-way valve
operate 1 second before the fan starts, 20 seconds later, outdoor compressor B starts
heating operation.
4.2Once an outdoor compressor starts, the other compressor will not start in 20 seconds
from the start.
4.3 When changed from cooling to heating, the compressor stands by for 3 minutes. When
both compressors are in the strand-by status, the outdoor fan stops. Otherwise, it operates.
The status of the fan depends on the number of the compressors that operate.
4.4 When the outdoor ambient temperature T1İ10ć, the outdoor fan runs at the high
speed. There is a return difference for the change between high and medium speed;
When the outdoor ambient temperature T1ı20ć, the outdoor fan runs at the low
speed. There is a return difference for the change between low and medium speed.
4.5Once a fan operates in a mode, it must operate for more than 45 seconds.
5. Cooling and heating operations take place at the same time:
5.1 When one of the indoor units gives out a cooling signal and another unit gives out a
heating signal at the same time, the outdoor fan operates at the low speed.
5.2 When the indoor unit gives the value of coil temperature, the outdoor fan runs at the low
speed if the heating outdoor unit judges high load.
5.3When outdoor ambient temperature T1ı28ć, there is no heating operation.
5.4When outdoor ambient temperature T1İ7ć, there is no cooling operation.
5.5Once a compressor starts, the other compressor will not start in 20 seconds from the start.
6.Single-unit heating operation with heat load:
6.1 In the single-unit heating operation, the indoor unit gives out the value of the coil
temperature, and the outdoor unit judges whether to start in the high load protection operation
Domestic Air Conditioner
Model: H2SM-14HC03/R2
H2SM-18HC03/R2
31
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