Panasonic CU-3KS19NBU Service Manual download pdf (Page 67)

Control/conditions

SENSOR

DRY

(1/f fluctuation fan)

The ON/OFF operation

button on the remote

controller is pressed.

The outdoor unit does not operate for 3 minutes

even after the breaker is turned ON.

This is in order to stabilize the return of oil to the

compressor.

The outdoor unit starts.

(Compressor and the outdoor fan start.)

When the frequency reaches Hz,

frequency increases are stopped for a period

of seconds. (Refer to Table 1.)

DRY B operation

If the indoor and outdoor temperatures are high,

the current peak cut-off activates, stopping

any increases in frequency.

The frequency then increases.

Unit operation Explanation

The operation lamp illuminates.

The indoor fan operates at the set fan speed.

The outdoor unit stops.

The room temperature

reaches the desired

temperature, and there

is no need for further

cooling.

Operating frequency is stabilized in order to

maintain a comfortable environment.

The room temperature is

59 °F or higher, and is

slightly too cold.

The compressor operates on a 3-minutes ON,

6-minutes OFF cycle, to prevent the room

temperature from dropping too much.

DRY operation starts

DRY A operation

The room temperature is

below 59 °F.

When monitoring operation begins, the

compressor stops, and the indoor fan operates at

"LL" (very low) speed.

Monitoring operation begins.

The indoor fan changes between "Low"

and "LL" (very low) over a 6-minute cycle.

This is 1/f fluctuation fan operation.

(Refer to Fig. 1.)

The indoor fan changes between "Low"

and "LL" (very low) over a 6-minute cycle.

This is 1/f fluctuation fan operation.

After appoximately 3 minutes, the

compressor turns OFF, the outdoor fan

turns OFF, and the indoor fan turns OFF.

After approximately 6 minutes, the

conditions return to (1).

(1)

(2)

(3)

The frequency is increased at the rate of 0.5

Hz every 1 seconds.

Operates to effectively dehumidify the air while

not excessively reducing the indoor

temperature.

The indoor unit operates at 1/f fluctuation fan

operation, at a fan speed that does not cause

a chilly feeling.

1/f fluctuation fan

250

200

6-minute cycle

Fig. 1

150

100

(Step)

50

0

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