Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 133

Anti cold air at heating mode
Anti frozen at heating mode
8.4 Protection
8.1.1 The compressor functions protection with a delay of three minutes.
8.1.2 Sensor protection at open circuit and breaking disconnection
8.1.3 Temperature Fuse break protection
8.1.4 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.
8.1.5 Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit
stops and LED displays failure information and can't returns to normal operation
automatically.
8.1.6 The current protection of the compressor.
Current up
Current
down
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 is 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:
Temp. up
Temp. down
Condition Indoor fan
I< I
RESTORE
I <I< I
RESTORE FAN
I <I<I
FAN 5MIN
I <I< I
5MIN 3SEC
I <I< I
5MIN 3SEC
I <I<I
FAN 5MIN
I <I< I
RESTORE FAN
I< I
RESTORE
Condition
T> Ts+1
T<Ts+1
T> Ts
T<Ts
Compressor
On On
On On
Low speed On
Off
Off
Off
Off
On On
Low speed On
On On
Compressor
On
Off
On
Off
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Outdoor fan
On
Off
On
Off
Off
Off
Off
Off
On
On
Outdoor fan
On
Off
On
Off
Remark
Heating mode
Cooling mode
After 5 Minutes
After 3 Seconds
After 3 Seconds
After 5 Minutes
Heating mode
Cooling mode