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13.2 Outdoor unit mode control
Control function
1.Cooling Anti-freeze Protection
To prevent indoor air conditioner evaporator temperature is too low, the indoor coil sensor
for real time detection of evaporator. If the indoor coil temperature is too low, the
compressor will protect.
2. Overload Protection
Air can heat exchanger temperature sensor for monitoring, when the sensor when the
temperature is too high, the compressor will be automatic protection
3. Exhaust temperature protection
To prevent deterioration due to high exhaust temperature of compressor, the machine will
realize the real-time detection of the temperature of exhaust gas. If the temperature is too
high compressor automatic protection
4. Oil-return Control
When the compressor runs for a long time low frequencies, control system will start the
return oil program. The system in the oil return to the compressor.
5.Operation Mode
Air conditioning mode is the operation mode set by users through remote controller, four
modes are available: cooling, heating, dehumidification, as well as fan mode.
6. Four-way Valve Control
Four-way valve of the outdoor machine shuts down when cooling and defrosting but starts
when heating. During the heating process, the four way valve to stop working for a period
of time after compressor disconnect.
7. . Start-up Protecti
To prevent compressor from restart frequently in the condition that system pressure has
not been completely balanced, it can't be restarted within 3 minutes.
8. Pressure Protection
When the pressure increases to a preset value, the pressure switch will automatically
protect. Compressor will stop and report the fault code protection.
DC-� INVERTER AIR CONDITIONER TECHNICAL&SERVICE MANUAL
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