Midea MSH-07CRN1, MSH-07HRN1, MSH-09CRN1, MSH-09HRN1, MSH-12CRN1, MSH-12HRN1 Manual page 246

Midea air conditioner service manual
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8.3 Dehumidifying mode
8.3.1
Indoor fan speed at low speed.
8.3.2
Protection is same as cooling mode.
8.1
Heating mode
8.4.1
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.
8.4.2
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.
8.4.3
Action conditions of compressor at heating mode: compressor must run for 7 minutes after starting
and then judge temperature. Meanwhile other protections are still valid.
Room temp. up
Room temp. down
8.4.4
Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold wind
function prevails.
Auto wind
Room temp. up
Room temp. down
Anti-cold wind function 1.
Indoor exchanger temp. up
Indoor exchanger temp. down
Anti- cold air protection 2( when the room temp. satisfy the setting temp.)
Room temp. up
Room temp. down
Indoor evaporator high-temperature protection
Indoor exchanger temp. up
Indoor exchanger temp. down
Condition
Compressor
T> Ts+4
T<Ts+4
T< Ts+3
T>Ts+3
Condition
T=Indoor Temp.-Setting Temp.
T<2¡ æ
T>2¡ æ
T> 0¡ æ
T<0¡ æ
Condition
T= Indoor exchanger temp.
T<TE1
TE1<T<TE2
T>TE2
T>TE3
TE4<T<TE3
T>TE4
T=evaporator pipe sensor temp.
T<TE14+2¡ æ
T> TE14+2¡ æ
T> TE14
T< TE14
Condition
T= Indoor exchanger temp.
T<TE8
TE8<T<TE7
T>TE7
T>TE9
T<TE9
41
Outdoor fan
Off
Off
On
On
On
On
Off
Off
Indoor fan speed
Indoor fan speed
Off
Low speed
Setting fan speed
Setting fan speed
Low speed
Off
Indoor fan speed
Low speed or stop
Setting speed.
Setting speed.
Stop after 15 seconds Low speed
Compressor
On
On
Off
Off
On
Med. speed
Low speed.
Low speed.
Med. speed
Outdoor fan
On
Off
Off
Off
On

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