Table of Contents
Advertisement
Control Specification
3.8
Outdoor Fan Control
1. Fan OFF delay when stopped
The outdoor fan is turned OFF 60 seconds after the compressor stops.
2. Fan ON control to cool down the electrical box
The outdoor fan is turned ON when the electrical box temperature is high while the compressor is
OFF.
3. Fan OFF control while defrosting
The outdoor fan is turned OFF while defrosting.
4. Fan ON/OFF control when operation starts / stops
The outdoor fan is turned ON when the operation starts. The outdoor fan is turned OFF when the
operation stops.
5. Fan control during forced operation
The outdoor fan is controlled as well as normal operation during forced operation.
6. Fan speed control during indoor / outdoor quiet operation
The rotation speed of the outdoor fan is reduced by the command of indoor / outdoor quiet
operation.
7. Fan control when the number of heating rooms decreases
When the outdoor temperature is more than 10°C (50°F), the fan is turned off for 30 seconds.
8. Fan speed control for pressure difference upkeep
The rotation speed of the outdoor fan is controlled to keep the pressure difference while cooling
with low outdoor temperature.
♦
♦
3.9
Liquid Compression Protection Function
Outline
In order to maintain the dependability of the compressor, the compressor is stopped according to
the outdoor temperature and temperature of the outdoor heat exchanger.
Operation stops depending on the outdoor temperature
Detail
Compressor turns off under the conditions that the system is in cooling operation and outdoor
temperature is below –12°C (10.4°F).
51
When the pressure difference is small, the rotation speed of the outdoor fan is reduced.
When the pressure difference is large, the rotation speed of the outdoor fan is increased.
SiUS12-928_A
Function and Control
Advertisement
Table of Contents
Troubleshooting
