Haier CA0035EAND Service Manual page 44

9.4 Units antifreeze
1) Try UPS unit;
2) The pump must be linked with the unit can be used to automatically control frost;
3) If the water-side heat exchanger flow path icing conditions, would cause serious damage, which occurs plate
heat exchangers or shell and tube heat exchanger rupture and leak, and the cracking damage is not covered
under warranty, so the antifreeze should give special attention to the following three points please users pay
particular attention to:
4) At lower ambient temperature if the unit on the outdoor temperature is below 0 ℃ environment shutdown should
spare the water-side heat exchanger in the water drained.
5) The runtime will likely result in runtime if the chilled water flow switch and antifreeze temperature sensor failure
pipes freeze and, therefore, the flow switch must be wired according to the wiring diagram.
6) When the maintenance unit to the refrigerant charge or for maintenance and let go of the refrigerant, it is
possible the cracking water-side heat exchanger or shell and tube heat exchanger.
7) Whenever the pressure vessel at 0.68MPa or less refrigerant, piping icing is likely to occur, therefore, make
sure to keep the heat exchanger water flow or water thoroughly, put a clean.
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