Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 - Page 46

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8.7.4 Under dehumidifying mode, the anti-freezing function of the indoor heat exchanger is
the same as that of cooling mode.
8.8 Heating mode
8.8.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode.
4-way valve must delay 2 minutes compared with compressor if the compressor
changed into non-heating mode or turned off. 4-way valve doesn't delay in
dehumidifying mode.
8.8.2 Generally, the outdoor fan is turned off with the on-off action of compressor in heating
mode, except for the defrosting mode or the end of defrost.
8.8.3 Action conditions of compressor under heating mode: compressor must run for 7
minutes after starting and then judge temperature. Meanwhile other protections are still
valid.
Condition Compressor Outdoor fan
TA> Ts+3 Off Off Room temp. up
TA<Ts+3 On On
TA< Ts+2 On On Room temp. down
TA>Ts+2 Off Off
8.8.4 Indoor Fan actions under heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but
Anti-cold wind function prevails.
Anti-cold wind control function under heating mode
Condition
TE
Indoor fan speed
TE<TE1 Off
TE1<TE<TE2 Breeze
Indoor exchanger temp. up
TE>TE2 Setting fan speed
TE> TE3 Setting fan speed
TE3<TE<TE4 Breeze
Indoor exchanger temp. down
TE<TE4 Off
8.8.5 Auto wind under heating mode
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<2℃ High Room temp. up
T>2℃ Med.
T> 0℃ Med. Room temp. down
T<0℃ High
8.8.6 Indoor evaporator high-temperature protection under heating mode
Condition Compressor Outdoor fan
TE<TE8 On On
TE8<TE<TE7 On Off
Indoor exchanger temp. up
TE>TE7 Off Off
TE>TE9 Off Off Indoor exchanger temp. down
TE<TE9 On On