-

 23 

-

¡

When the indoor heat exchanger
temperature is =

> 58˚C

Indoor heat exchanger temp. (˚C)

Compressor

Indoor heat exchanger temp. (˚C)

¡

When the indoor heat exchanger
temperature is =

> 62˚C

(5)

High-pressure control

The indoor heat exchanger thermistor detection temperature controls the outdoor fan and compressor.

48

  62

ON

OFF

(6)

Current Cut

If current that is higher than the set current flows for 0.5 second continuously, the current to the compressor is cut off. After a 3-

minute delay, if the current is 1.5 ~ 2 A or less, the compressor restarts, but if the overcurrent is detected 5 times within 60 minutes

after it is detected the first time, it results in an abnormal stop. Also, if the overcurrent continues for 60 minutes, it results in an

abnormal stop.

Outdoor fan

48

  58

OFF

ON

4.11   Protective control function

(1)

Frost prevention for indoor heat exchanger

 (During cooling or dehumidifying)

(a)

Operating conditions

(i)

Indoor heat exchanger temperature (detected with Th2) is lower than 2.5ºC.

(ii)

3 minutes elapsed after the start of operation.

(b)

Detail of anti-frost operation

Compressor

OFF

Indoor fan

1st speed

Outdoor fan

OFF

4-way valve

Stop mode

(c)

Reset conditions:

 Indoor heat exchanger temperature (Th2) is higher than 8ºC.

(2)

Indoor fan motor protection

When the air conditioner is operating and the indoor fan motor is turned ON, if the indoor fan motor has operated at 300 rpm or

under for more than 30 seconds, the unit enters first in the stop mode and then stops the entire system.

Timer lamp illuminates simultaneously and the operation lamp flashing 6 times at each 8-second.

(3)

Dew condensation prevention control for cooling operation

This prevents dew condensation, in the indoor unit, from occurring.

(a)

Operating condition:

 when compressor is kept ON for 30 min. after the unit starts operation.

(b)

Operation content:

 forces the indoor fan to change from Speed 1 to Speed 2.

(c)

Resetting condition:

 When compressor is off, or when dew condensation prevention control has been operating continu-

ously for 30 minutes.

(4)

Three-minute forced operation

When the compressor begins operating the thermal operation is not effective for 3 minutes, so operation continues as is in the

operation mode. (After 3 minutes has passed the thermal operation is effective.)

However, stopping the compressor via a stop signal or protection control has priority.

Опубликовано TopClimat