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5. SOUND LEVELS
YKB/YLM 2nd
Y (HIGH COP)
MEE15K022
Depending on the operation conditions, the unit generates noise caused by valve actuation, refrigerant flow, and
pressure changes when operating normally. Please consider to avoid location where quietness is required.
Measurement
location
1m
1m
Measurement condition
PUHY-EP400, 450, 500YLM-A1(-BS)
63
125
250
500
1k
2k
4k
8k
dB(A)
Standard
50/60Hz
76.0
72.5
64.5
61.5
56.0
51.5
47.5
41.5
63.5
Low noise mode
50/60Hz
67.5
63.0
50.0
48.5
46.5
47.5
41.5
34.0
54.0
When Low noise mode is set,the A/C system's capacity is limited. The system could return to normal operation
from Low noise mode automatically in the case that the operation condition is severe.
10
20
30
40
50
60
70
80
90
63
125
250
500
1k
2k
4k
8k
NC-40
NC-30
NC-20
NC-60
NC-50
NC-70
Octave band central frequency (Hz)
Octave band sound level (dB)
Approximate minimum
audible limit on
continuous noise
Sound level of PUHY-EP500YLM-A1(-BS)
Standard
50/60Hz
Low
50/60Hz
63
125
250
500
1k
2k
4k
8k
dB(A)
Standard
50/60Hz
74.5
70.0
64.0
60.5
55.5
50.0
47.0
42.0
62.5
Low noise mode
50/60Hz
67.0
62.0
48.0
47.0
46.0
46.5
40.5
33.0
53.0
When Low noise mode is set,the A/C system's capacity is limited. The system could return to normal operation
from Low noise mode automatically in the case that the operation condition is severe.
10
20
30
40
50
60
70
80
90
63
125
250
500
1k
2k
4k
8k
NC-40
NC-30
NC-20
NC-60
NC-50
NC-70
Octave band central frequency (Hz)
Octave band sound level (dB)
Approximate minimum
audible limit on
continuous noise
Sound level of PUHY-EP400YLM-A1(-BS)
Standard
50/60Hz
Low
50/60Hz
63
125
250
500
1k
2k
4k
8k
dB(A)
Standard
50/60Hz
75.0
71.0
64.5
61.0
56.0
51.0
47.0
41.0
63.0
Low noise mode
50/60Hz
66.0
62.0
48.5
47.5
46.0
46.5
40.0
33.0
53.0
When Low noise mode is set,the A/C system's capacity is limited. The system could return to normal operation
from Low noise mode automatically in the case that the operation condition is severe.
10
20
30
40
50
60
70
80
90
63
125
250
500
1k
2k
4k
8k
NC-40
NC-30
NC-20
NC-60
NC-50
NC-70
Octave band central frequency (Hz)
Octave band sound level (dB)
Approximate minimum
audible limit on
continuous noise
Sound level of PUHY-EP450YLM-A1(-BS)
Standard
50/60Hz
Low
50/60Hz
