Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 - Electronic Function and Protection; Protection Mechanisms

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8.4.7
Condition Indoor fan Compressor Outdoor fan Remark
I< I
RESTORE
On On On
On On Off Heating mode I
RESTORE
<I< I
FAN
Low speed On On Cooling mode
I
FAN
<I<I
5MIN
Off Off After 5 Minutes
Current up
I
5MIN
<I< I
3SEC
Off Off After 3 Seconds
I
5MIN
<I< I
3SEC
Off Off After 3 Seconds
I
FAN
<I<I
5MIN
Off Off After 5 Minutes
On On Off Heating mode I
RESTORE
<I< I
FAN
Low speed On On Cooling mode
Current
down
I< I
RESTORE
On On On
If compressor turns off for continuously 4 times due to Current protection in 5 minutes
from Compressor On, the unit stops and LED displays failure information and can’t
returns to normal operation automatically.
8.5 Fan-only mode
Fan speed can be set to high/mid/low/ Auto.
8.6 Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:
Condition Compressor Outdoor fan
T> Ts+1 On On Temp. up
T<Ts+1 Off Off
T> Ts On On Temp. down
T<Ts Off Off
Auto fan
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<3℃ Low
3℃<T<5℃ Med.
Temp. up
T>5℃ High
T> 3℃ High
1℃<T<3℃ Med.
Temp. down
T<1℃ Low
Anti-freezing control to indoor evaporator ( T: evaporator temp. )
Condition
Temp. Time
Compressor Outdoor fan
T> TE6 On On Temp. up
T< TE6 >5 Minutes Off Off
T> TE5 On On Temp. down
T< TE5 Off Off