Carrier ALLEGRO 42HQE009N Service Manual page 17

Allegro series split wall-mounted type room air conditioner
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Fan speed is high/mid/low/ Auto
9.6
Cooling mode
The 4-way valve is closed at cooling mode.
The action of the compressor and the outdoor fan:
Temp. up
Temp. down
Auto fan at cooling mode:
Temp. up
Temp. down
Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Temp. up
Temp. down
9.7 Dehumidifying mode
9.7.1
The 4-way valve is off in dehumidifying mode
9.7.2
Compressor and Indoor Fan actions in dehumidifying mode
NO
1
2
3
Repeat on and off cycle.
9.7.3
Low room temperature protection:
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 13℃.
9.7.4
At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same as
that of cooling mode.
Condition
T>Ts+1
T<Ts+1
T>Ts
T<Ts
Condition
T=Indoor Temp.-Setting Temp.
T<3
3 <T<5
T>5
T>3
1 <T<3
T<1
Condition
Temp.
T> TE6
T< TE6
T> TE5
T< TE5
Conditions
Indoor Fan
TA ≥TS+2
TS ≤TA<TS+2
TA < TS
Compressor
On
Off
On
Off
Indoor fan speed
Compressor
Time
>5 Minutes
>5 Minutes
Compressor and Outdoor Fan
LOW
ON 6minutes
BREEZE
OFF 4minutes
LOW
ON 5minutes
BREEZE
OFF 5minutes
LOW
ON 4minutes
BREEZE
OFF 6minutes
16
Outdoor fan
On
Off
On
Off
Low
Med.
High
High
Med.
Low
Outdoor fan
On
On
Off
Off
On
On
Off
Off

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