Heat Controller | Service Manual | Packaged Terminal A/C |
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F. Protective Features
1. Frost Protection Mode (heat pump):
When the compressor is running under wired controller’s heating signal. If T outer tube ≤ 28°F
2. High temperature protection for evaporator:
When the compressor is running under wired controller’s heating signal, if T inner tube ≤ 136°F (58°C) is detected for 1 minute successively, the compressor and outdoor fan will stop running and the indoor fan will run normally according to the wired controller’s signal. If heating is required the heat pump operation will stop the compressor and run the electric heater solely after 15 seconds.
3. Antifreezing protection for evaporator:
Whe the compressor is running under wired controller’s heating signal, if T inner tube ≤ 28°F
4. Higher temperature protection for outdoor condenser:
Under the wired controller’s signal, the compressor is running. If T outer tube ≤ 149°F (65°C) is detected for 1 minute suc- cessively, the high temperature resistant protection mode will be enabled. The compressor will stop running, the indoor fan will run normally according to the signal of wired controller and the outdoor fan will run constantly until T outer tube ≤131°F (55°C) is detected for 2 minutes successively then the protection mode will stop.
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