Sea Breeze PTAC Service Manual page 22

setting temperature is displayed. T value is 0, the fan speed is medium and the setting temperature is
71 ℉.
5. Protection Functions
1) Defrost (heat pump only).
2) Entry condition: When the compressor is controlled by wall thermostat in heating mode, and the outdoor
tube temperature ≤ 28 ℉(-2 °C) is over 1 minute continuously, the compressor and outdoor fan will stop
running. Then indoor fan is running normally according to the wall thermostat signal. If the heating is
required at the moment, then the compressor operation will be replaced by the electric heating.
3) Quit condition: In the frost protection mode, when the outdoor tube temperature ≥ T 40 ℉(5 °C) is over
10 minutes, it will quit the frost protection mode.
4) High temperature protection for evaporator.
5) Entry condition: When the compressor is controlled by wall thermostat in heating mode, and the indoor
tube temperature ≤ 136 ℉(58 °C) is over 1 minute continuously, the compressor and outdoor fan will
stop running and the indoor fan is running normally according to the wall thermostat signal. If the
heating is required at the moment, then the compressor operation will be replaced by the electric
heating after 15 seconds.
6) Anti-freezing protection for the evaporator.
7) Entry condition: When the compressor is controlled by wall thermostat in heating mode, and the indoor
tube temperature ≤ 28 ℉(-2 °C) is over 1 minute continuously, the compressor and outdoor fan will stop
running and the indoor fan is running normally according to the wall thermostat signal. (If the indoor fan
stops before the protection, it will be activated and run at medium fan speed.)
8) Quit condition: In the anti-freezing protection, when the indoor tube temperature ≤ 40 ℉(5 °C) is over 2
minutes, the system will quit anti-freezing protection.
9) High temperature protection for the outdoor condenser.
10) Entry condition: When the compressor is controlled by wall thermostat, and the outdoor tube
temperature ≤ 149 ℉(65 °C) is over 1 minute continuously, then the high temperature protection will be
activated. The compressor will stop running, outdoor fan will keep running continuously, and the
indoor fan is running normally according to the wall thermostat signal.
11) Quit condition: If the outdoor tube temperature ≤ 131 ℉(55 °C) is over 2 minutes, this protection will be
ended.
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