GD Midea Refrigeration Equipment Elite Series, Техническое и сервисное руководство

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8.4.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting 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 4 minutes after starting
and then judge temperature. Meanwhile other protections are still valid.
Condition Compressor Outdoor fan
T> Ts+4 Off Off Room temp. up
T<Ts+4 On On
T< Ts+3 On On Room temp. down
T>Ts+3 Off Off
8.4.4 Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller,
Anti-cold wind function 1.
Condition
T= Indoor exchanger temp. Indoor fan speed
T<TE1 Off
TE1<T<TE2 Low speed
Indoor exchanger temp. up
T>TE2 Setting fan speed
T>TE3 Setting fan speed
TE4<T<TE3 Low speed
Indoor exchanger temp. down
T>TE4 Off
Anti- cold air protection 2 ( when the room temp. satisfy the setting temp.)
T=evaporator pipe sensor temp. Indoor fan speed
T<TE14+2 Low speed or stop Room temp. up
T> TE14+2 Setting speed.
T> TE14 Setting speed. Room temp. down
T< TE14 Stop after 15 seconds Low speed
Auto wind
Condition
T=Indoor Temp.-Setting Temp.
Indoor fan speed
T<2 Med. speed Room temp. up
T>2 Low speed.
T> 0 Low speed. Room temp. down
T<0 Med. speed
Indoor evaporator high-temperature protection
Condition
T= Indoor exchanger temp.
Compressor Outdoor fan
T<TE15=54
℃
On On(high speed)
TE15<T<TE8 On On(low speed)
TE8<T<TE7 On Off
Indoor exchanger temp. up
T>TE7 Off Off
T>TE9 Off Off Indoor exchanger temp. down
T<TE9 On On
8.5 Defrosting mode
8.5.1 Conditions of defrost:
Defrosting starts when either of the following :
T3 lower than 0°c, lasts for more than 40 minutes, provided that the time period when the temperature
is lower than -3°c consecutively reaches 3 minutes.
Calculate from the end of latest defrost, evaporator high temp. protection only closes outdoor fan with