Midea M2OA-18HRDN1, User Manual

Page: 146 / 162

Control function MCAC-HTSM-2007-11
144 Control System
1.1.7.3Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Evaporator Temp. Compressor
T< 4
°
C
Off
T > 8
°
C
On
1.1.8 Dehumidifying mode
1.1.8.1 the indoor fan is fixed in low speed
1.1.8.2 Low room temperature protection:
When room temperature decreases to below 10
°
C, indoor fan stop, when room temperature
restores to over 12
°
C, indoor fan start.
1.1.8.3 At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as that
of cooling mode.
1.1.9 Heating mode
1.1.9 1Indoor 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
Indoor exchanger temp. up
T<34
°
C Off
34
°
C <T<37
°
C Breeze
37
°
C <T<44
°
C Low speed
T> 44
°
C Setting fan speed
Indoor exchanger temp.
down
T> 38
°
C Setting fan speed
33
°
C <T<38
°
C Low speed
24
°
C <T<33
°
C Breeze
T<24
°
C Off
1.1.9.2 Auto wind at heating mode
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
Room temp. up
T<1.5
°
C High
1.5
°
C <T<2.5
°
C Mid.
T>2.5
°
C Low
Room temp. down
T<1.0
°
C High
1.0
°
C <T<2.0
°
C Mid.
T>2.0
°
C Low
1.1.9.3 Indoor evaporator high-temperature protection at heating mode
Condition
T= Indoor exchanger temp.
Compressor
T<48
°
C On
53
°
C <T<63
°
C Decrease frequency of compressor
T>63
°
C Off