Error To Prevention From Freezing And Bursting Of Heat Exchanger - Samsung AM017HN1DEH/EU Service Manual

Troubleshooting

4-4-94 Error to prevention from freezing and bursting of Heat Exchanger

Outdoor unit display
Indoor unit display
Criteria
Cause of problem
1. Inspection Method
Check the circulation water flow.
Does circulation water flow maintain
at least the recommended flow?
Check the Water Out temperature of circulation water.
Is Water Out temperature more than 3℃?
Check the EVA In/Out temperature.
No
- Check the control status of EEV.
- Check the EVA In/Out temperature sensor.
- Check the Water In temperature.
418
↔
/
/ (Repeats six times)
. Water Out temperature is less than 3
. EVA In/Out maintains the temperature below zero.
(* During the cooling operation, can be detected)
• Low Heat Exchanger internal temperature of xxx Hydro Unit. (Low flow / Low water temperature)
Yes
Yes
Is EVA In/Out temperature
maintain below zero?
Yes
XXX (xxx : Address of Indoor Unit that error occurred))
.
No
Check the piping system of circulation water.
(Pump, Strainer, Valves)
No
- Check the defect of Water Out temperature sensor.
- Make sure the Water In temperature is lowered.
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