Midea MC-SU30-RN1L

Aqua Tempo Super II
201709 27
Part 3
- Control
6.10 Water Side Heat Exchanger Low Temperature Protection Control
This control protects the water side heat exchanger from ice formation.
Figure 3-6.12: Water side heat exchanger low temperature protection control in normal cooling mode
Notes:
1. Taf1: Water side heat exchanger anti-freezing temperature1
2. Taf2: Water side heat exchanger anti-freezing temperature2
When water side heat exchanger anti-freezing temperature1 (Taf1) or water side heat exchanger anti-freezing
temperature2 (Taf2) is at or below 3°C for more than 3 seconds, the system displays PE protection and the corresponding
unit stop running. When water side heat exchanger anti-freezing temperature1 (Taf1) and Water side heat exchanger
anti-freezing temperature2 (Taf2) rise to 10°C or higher, the compressor enters re-start control. Use the user interface to
clear the error.
Figure 3-6.13: Water side heat exchanger low temperature protection control in low water outlet mode
When water side heat exchanger anti-freezing temperature1 (Taf1) or water side heat exchanger anti-freezing
temperature2 (Taf2) is at or below 0°C for more than 3 seconds, the system displays PE protection and orders the
corresponding units to stop running. When water side heat exchanger anti-freezing temperature1 (Taf1) and Water side
heat exchanger anti-freezing temperature2 (Taf2) rise to 5°C or higher, the compressor enters re-start control. Use the user
interface to clear the error.
Min (Taf1 or Taf2) ≤ 3°C
Min (Taf1 and Taf2) >10°C
Normal operation
Low temperature protection, error code PE is
displayed
Min (Taf1 or Taf2) ≤ 0°C
Min (Taf1 and Taf2) > 5°C
Normal operation
Low temperature protection, error code PE is displayed