Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 45

8.4 Protection
8.4.1 The compressor functions protection with a delay of three minutes.
8.4.2 High temp. protection of condenser.
8.4.3 Sensor protection at open circuit and breaking disconnection
8.4.4 Temperature Fuse break protection
8.4.5 Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High
Fan+300RPM)or too low(lower than 400RPM), the entire unit stops and LED displays
failure information and can't returns to normal operation automatically.
8.5 Fan-only mode
Fan speed is high/mid/low/ Auto
8.6 Cooling mode
The 4-way valve is closed under cooling mode.
The action of the compressor and the outdoor fan:
Temp. up
Temp. down
Auto fan under cooling mode:
Temp. up
Temp. down
Anti-freezing control to indoor evaporator under cooling mode
Temp. up
Temp. down
Condenser high-temperature protection under heating mode
T3 >65 , turn off compressor; T3<6 0 ,Protection removed,Compressor turned on.
8.7 Dehumidifying mode
8.7.1 The 4-way valve is off in dehumidifying mode
8.7.2 Compressor and Indoor Fan actions in dehumidifying mode
Compressor run 5 minutes , and indoor fan run 5 minutes in low speed, then turn off the
compressor, indoor fan run 5 minutes in low speed. And repeat on and off cycle.
8.7.3 Low room temperature protection:
When room temperature decreases to below 10 , the compressor and the outdoor fan
will stop(indoor fan is Breeze). Dehumidifying operation will be resumed when room
temperature restores to over 13 .
Condition
TA> Ts+1
TA<Ts+1
TA> Ts
TA<Ts
Condition
T=Indoor Temp.-Setting Temp.
T<3
3 <T<5
T>5
T> 3
1 <T<3
T<1
Condition
Temp.
T> TE6
T< TE6
T> TE5
T< TE5
Compressor
On
Off
On
Off
Indoor fan speed
Low
Med.
High
High
Med.
Low
Compressor
Time
On
>5 Minutes Off
On
>5 Minutes Off
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Outdoor fan
On
Off
On
Off
Outdoor fan
On
Off
On
Off