CONTROL
20
4.7.3 High discharge temperature protection control
This control protects the compressor from abnormally high temperatures and transient spikes in temperature.
Normal operation (sizes 2.1 to 8.1)
Discharge temperature > 115°C
↓ ↑
Discharge temperature < 95°C
High discharge temperature protection, error code P4 is displayed
Normal operation (sizes 9.1 to 14.1)
Discharge temperature > 115°C
↓ ↑
Discharge temperature < 90°C
High discharge temperature protection, error code P4 is displayed
When the discharge temperature rises above 115°C, the system displays P4 protection and the unit shuts down. When
the discharge temperature drops below 95°C, the compressor enters re-start control.
4.7.4 Low discharge temperature protection control
Normal operation
Tp < Th for more than 5 minutes
↓ ↑
Tp ≥ Th
Low discharge temperature protection, error code EA is displayed
When the discharge temperature (Tp) is below suction temperature (Th) for more than 5 minutes, the system displays
EA protection and the unit shuts down.
When the discharge temperature is higher than the suction temperature, the compressor enters re-start control.
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