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Power Cut - Heat Pump Evaporator Iced Up

 
Air Source Heat Pumps (ASHPs)
Last Post by trebor12345 3 months ago
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trebor12345
 trebor12345
(@trebor12345)
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Joined: 2 years ago
Posts: 127
Topic starter 21/11/2025 8:42 pm  

We have just had a power cut and 1 hour later power was restored.  The heat pump powered up again and after 30 minutes I became nervous that the evaporator was at -20C, hardly any air flow across the evaporator, so I have shut it down for the rest of the evening.

How do you deal with the above situation and a iced up evaporator?

What would of happened if I had let it run in this iced up situation?

Did I do the right thing by turning off, or should I have let it run?

Thank you for your feedback.

BTW, R32 refrigerant.


This topic was modified 3 months ago 2 times by trebor12345

Hitachi Yutaki SCombi Heat Pump
(Indoor Unit ) RWD-3.0RW1E-220S-K
(Outdoor Unit) RAS-3WHVRP1

2024 build bungalow
Southern england
179 m2
High level of insulation
Underfloor heating
All 12 circuits are fully open all the time
1 thermostat in family room
7KW heat pump
50 litre buffer tank (4 port)
3.6KW solar panels
Energy used by heating 2527 KWh - 7527 KWh (SCOP 3.5 approx)


   
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