Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 98

The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more than
80 minutes, and the temperature remains consecutively Ti2 for more than 3 minutes.
Model
MSG-09HRI :
MSG-12HRI :
MSG-09HRIN2 :
MSG-09HRIN2 :
The temperature of outdoor heat exchanger remains consecutively lower than 3°c for more than
120 minutes, and the temperature remains consecutively Ti3 for more than 3 minutes.
Model
MSG-09HRI :
MSG-12HRI :
MSG-09HRIN2 :
MSG-09HRIN2 :
Note: The time period starts to count when outdoor heat exchanger temperature is lower than
3°c, the defrosting operation starts when the exchanger temperature remains lower than the
starting temperatures which are Ti3, Ti2, Ti1.
8.5.8.2 Conditions of defrost ending
Defrosting ends when meeting any of the following three conditions and it turns to normal
heating operation.
When the temperature of outdoor heat exchanger rises up to 12°c.
When the temperature of outdoor heat exchanger rises up to 8°c and this continues for more
than 80 seconds.
When defrosting action continues for 10 minutes.
8.5.8.3 Defrosting Action
ON
Compressor
ON
4 way valve
ON
Outdoor fan
ON
Indoor fan
Max 10 mins
30 sec.
10 sec.
The indoor fan operates in anti-cold air mode when it recovers
Ti2:
-2°c
-4°c
-7°c
-7°c
Ti3:
-0°c
-2°c
-5°c
-5°c
ON 30 sec
OFF
OFF
OFF
OFF
195
ON
ON
ON