Carrier ALLEGRO 42HQE009N Service Manual page 18

9.7.5 At dehumidifying mode, the action of fans of indoor is the same as that of air-only mode.
9.8 Heating mode
9.8.1 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.
9.8.2 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.
9.8.3 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.
Room temp. up
Room temp. down
9.8.4 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
Indoor exchanger temp. up
Indoor exchanger temp. down
9.8.5 Auto wind at heating mode
Room temp. up
Room temp. down
9.8.6 Indoor evaporator high-temperature protection at heating mode
Indoor exchanger temp. up
Indoor exchanger temp. down
9.8.7 The louver opens to Standard Angle ANGLHEAT when power is on for the first time
Condition Compressor
T> Ts+3
T<Ts+3
T< Ts+2
T>Ts+2
Condition
T= Indoor exchanger temp.
T<TE1
TE1<T<TE2
T>TE2
T> TE3
TE3<T<TE4
T<TE4
Condition
T=Indoor Temp.-Setting Temp.
T<2
T>2
T>0
T<0
Condition
T= Indoor exchanger temp.
T<TE8
TE8<T<TE7
T>TE7
T>TE9
T<TE9
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Outdoor fan
Off Off
On On
On On
Off Off
Indoor fan speed
Indoor fan speed
Compressor
On
On
Off
Off
On
Off
Breeze
Setting fan speed
Setting fan speed
Breeze
Off
High
Med.
Med.
High
Outdoor fan
On
Off
Off
Off
On