Hisense AS-18UR4STVUH1, Service Manual

5

5

.

.

C

C

O

O

N

N

T

T

R

R

O

O

L

L

M

M

O

O

D

D

E

E

A

A

S

S

-

-

1

1

8

8

U

U

R

R

4

4

S

S

T

T

V

V

U

U

H

H

1

1

14

a.

When T

room

t

＞

26

℃

，

  it starts in the cooling mode, temperature being set at 26

℃

b.

 When 23

℃

＜

T

room

≤

26

℃

，

  it starts in the dehumidify run mode; 

c.

When 21

℃

＜

T

room

≤

26

℃

, it starts in the ventilation mode.   

d.

WhenTroom

≤

21

℃

, it starts in the heating mode, temperature being set at 22

℃

 
In this Automatic run mode , based on the automatic setting temperature ,the set 
temperature can only be changed 2 

℃

(up & down) 

   
Once the    machine    being shutdown , after 5 minutes stopping period ,the running 
mode would be set again base on the room temperature . 

 
4.2Cooling-run mode 

4.2.1 Temperature compensation   

Principle for compensation: The compensation is available only if the proper 

sensor is used and it is not available when it is subject to the sensor on the 

remote controller. 

4.2.2 Outdoor Fan 
The outdoor fan’s speeds are divided into two levels which can be changed over 
according to outdoor ambient temperatures. 

When operating at a fixed frequency, the outdoor fan is forced to operate at the 

high speed.   
4.2.3 Indoor fan 
When the fan speed is set at the high, medium and low fan speeds, the fan runs at a 
preset speed. When the fan speed setting is automatic, the fan speed is set based on 
the difference in room temperatures.      

T

room

-T

set

 Indoor 

fan 

speed 

T

room

-T

set

≤

2

0

C Low 

2

0

C 

<

T

room

-T

set

<

4

0

C Medium 

T

room

-T

set

≥

4

0

C High 

 
4.2.4 Prevention against condensation and insufficient heat exchange at the low 
indoor fan speed.   
When the indoor fan speed is set at the low fan speed, the compressor’s power is 
restricted as in the low temperature cooling. 
4.2.5  4-way valve 
State: It is interrupted in cooling. 
Switchover: When initially powered on for cooling, the 4-way valve is interrupted 
immediately. 
When the heating is changed to the cooling, it needs an interval of 50 seconds for the 
4-way valve to change over from being activated to being interrupted.           
4.2.6 Cooling-pre mode   
          When start machine in cooling mode, the flaps will switch to cooling-pre angle,