Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 - Page 98

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② 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
Ti2:
MSG
-
09HRI :
-
2
°
c
MSG
-
12HRI :
-
4
°
c
MSG
-
09HRIN2 :
-
7
°
c
MSG
-
09HRIN2 :
-
7
°
c
③ 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
Ti3:
MSG
-
09HRI :
-
0
°
c
MSG
-
12HRI :
-
2
°
c
MSG
-
09HRIN2 :
-
5
°
c
MSG
-
09HRIN2 :
-
5
°
c
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.
① When the temperature of outdoor heat exchanger rises up to 12°c.
② When the temperature of outdoor heat exchanger rises up to 8°c and this continues for more
than 80 seconds.
③ When defrosting action continues for 10 minutes.
8.5.8.3 Defrosting Action
Max 10 mins
30 sec.
ON 10 sec. ON 30 sec
Compressor OFF
ON ON
4 way valve OFF
ON ON
Outdoor fan OFF
ON ON
Indoor fan OFF
The indoor fan operates in anti-
cold air mode when it recovers