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SS-SVM001A-EM
11. Control mode
Control function
1. Cooling Anti-Freeze Protection
The outdoor pressure sensor functions as real time temperature detector of evaporator.
It prevents the indoor unit evaporator temperature becoming too low. If the indoor coil
temperature is too low, the compressor will automatically start protection mode.
2. Overload Protection
To prevent system overload caused by excessive pressure, the machine will implement real-
time detection when outdoor coil temperature is too high during cooling mode.
3. Exhaust temperature protection
To prevent deterioration due to high exhaust temperature of compressor, the machine will
realize the real-time detection of the exhaust gas temperature. If the temperature is too high
compressor provides automatic protection.
4. Oil-return Control
When the compressor runs at low frequencies for a long time, control system will start the
oil-return mechanism. The oil in the system returns to the compressor.
5. Start-up Protection
To prevent compressor from restarting frequently when the system pressure has not been
completely balanced, it cannot be restarted within 3 minutes.
6. Pressure Protection
When the pressure increases to a preset value, the pressure switch will automatically come
to protection mode. The compressor will stop and report the fault code protection.
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