Midea MSV1-09HRDN1 - Dehumidifying Mode; Heating Mode

Service manual
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Set temp. to 17°C
Set fan speed to high speed
Push turbo button 5 times in 10 seconds.
Using special remoter controller
After 5 hours, cancel rated capacity test
Turbo function
Increasing frequency of compressor
After operating 30 minutes, return automatically to the mode and temp. previously selected.
11.5. Dehumidifying mode
11.5.1 The 4-way valve is off
11.5.2 The indoor fan is fixed in breeze speed
11.5.3 Compressor run in low frequency
11.5.4 Low room temperature protection:
11.5.5 When room temperature decreases to below 10℃, compressor and outdoor fan will stop(indoor
fan is Breeze). Dehumidifying operation will be resumed when room temperature restores to over
12℃.
11.5.6 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as
that of cooling mode.
11.6. Heating mode
11.6.1. Generally, the 4-way valve is open at heating mode, but it is closed at defrosting. 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.
11.6.2. 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.
11.6.3. Action of compressor and outdoor fan motor at heating mode: compressor must run for 7
minutes after starting and then judge temperature. Meanwhile other protections are still valid.
Condition Compressor Outdoor fan
T> Ts+3 Off Off Room temp. up
T<Ts+3 On On
T< Ts+2 On On Room temp. down
T>Ts+2 Off Off
11.6.4. 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.
Anti-cold wind control function at heating mode
Condition （T= Indoor exchanger temp.）
Indoor fan speed
T<34℃ Off
34℃<T<37℃ Breeze
37℃<T<44℃ Low speed
Indoor exchanger temp. up
T>44℃ Setting fan speed
T> 38℃ Setting fan speed
33℃<T<38℃ Low sped
24℃<T<33℃ Breeze
Indoor exchanger temp. down
T<24℃ Off
When the indoor temp. gets to setting temp, indoor changes to breeze speed immediately, after 127
second, indoor fan stop.
11.6.5. Auto wind at heating mode
Condition (T=Indoor Temp.-Setting Temp.) Indoor fan speed
T<1.5℃ High
1.5℃<T<2.5℃ Med.
Room temp. up
T>2.5℃ Low