Panasonic cu-4ks24nbu User Manual

Current(A)

Frequency (Hz)

Trip

Hz reduction

Hz increase

prohibit

Hz reduction
Hz increase prohibit

Hz reduction

Hz increase prohibit

(16)

(15.6)

0

(30)

Example of operation during cooling

The operating frequency upper limits shown in the figure below are established for frequency reduction and 

increase-prohibit.

(230)

(223)

(212)

Trip

5Hz every 30 sec. reduction

2Hz every 30 sec. reduction

No control

Increase

prohibit range

(Hz reduction)

(°F)

(194)

Within the increase-prohibit range, the range changes 

to the Hz reduction range (2 Hz every 30 seconds) if 

the compressor temperature rises by 4 °F.

*

Operation starts at (8 Hz), and the start current is less than the normal operating  current. This prevents the flickering 

of fluorescent lights or television screens that occurs when ordinary A/C units start.

To protect the compressor coil from overheating, the operating frequency is controlled based on the compressor 

discharge temperature.