Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 207

8.8.6 Indoor evaporator high-temperature protection at heating mode
Indoor exchanger temp. up
Indoor exchanger temp. down
8.9 Defrosting operation (Available for heating only).
8.9.1 Defrosting condition: Defrosting starts when either of the following ¢ Ù &¢ Ú :
¢ Ù A and B are satisfied:
A: The compressor keeps running for 40 minutes or more.
B: The temperature difference of evaporator and room temperature meets one of the following:
¢ Ú Calculate from the end of latest defrost, evaporator high temp. protection only closes outdoor fan
with the compressor still running. Add up to 90 minutes.
8.9.2 Defrosting time
If the temp. difference condition ¢ Ù
severe frosting. The defrosting time is 10 minutes.
If the temp. difference condition ¢ Ú
minutes.
If the temp. difference condition ¢ Ù
minutes, after three continuous 6-minute defrost, the fourth should be 10 minutes defrost. The
circulation is as following:
¡ ú 6-minute defrost ¡ ú
8.9.3 Ending condition of defrosting
If one of following conditions is satisfied, end the defrost and turn into heating mode:
A. The defrost time has reached to 6 or 10 minutes.
B. The compressor current has reached to I
Condition
T= Indoor exchanger temp.
T<TE8
TE8<T<TE7
T>TE7
T>TE9
T<TE9
¡ æ
Fan speed is high
Fan speed is mid
Fan speed is low
Breeze
is satisfied for less than 40 minutes, this can be regarded as
is satisfied for more than 40 minutes, the defrosting time is 6
is satisfied out of 40 minutes, generally the defrosting time is 6
6-minute defrost¡ ú 6-minute defrost¡ ú 10-minute defrost¡ ú
Compressor
On
On
Off
Off
On
Temp. of evaporator---room temp.
¡ Ü TH
DEFROST
¡ Ü TM
DEFROST
¡ Ü TL
DEFROST
Meet only if it is Breeze
or above, I
DEFROST DEROST
91
Outdoor fan
On
Off
Off
Off
On
differs in different models.