Johnson Controls YVAHP0721CW Series, Service Manual

Page: 371 / 416

SM-16007
5-11
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
• Setting Example
Low Noise Setting at Input 2 (between 2 and 3 pins of CN17), Control Function No. 12
(6) Input Low Noise Setting 1, 2, 3 (Control Function No.11 to 13)
When the input terminals for Low Noise Setting on the outdoor unit PCB are short-circuited, the compressor
frequency and outdoor fan rotation frequency are controlled and the operating sound of the outdoor unit will
be as shown in the table below.
The operating sound can be set by selecting the Control Function No.
NOTE:
(a) The outdoor unit capacity will decrease because the compressor frequency and outdoor fan motor
frequency forcibly decrease. The operating range will also be restricted.
(b) The value on the table below indicate the operating sound (targeted value) of single unit. In some
cases, the operating sound may be temporarily higher than the value in the table below. The operating
sound of combination units will be higher than the value on the table below.
(c) If Low Noise Setting is always required without input signal, refer to Section 5.3.2.2 (6) “Low Noise
Setting”
< Control Function No. for Low Noise Setting and Operating Sound/Outdoor Unit Capacity >
Control Function No.
Operating Sound
(Targeted Value)
Outdoor Unit Capacity
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No Setting Catalog Value 100%
11 (Low Noise Setting 1) 55 80%
12 (Low Noise Setting 2) 50 60%
13 (Low Noise Setting 3) 45 40%
100%
60%
Capacity
Operating
Sound
Day Time Night Time Day Time 20:00 8:00
Catalog Value [dB]
50 [dB]
Input Terminal
Short-circuited
Wiring Diagram Example of Low Noise Setting
[Example] “Low Noise Setting 2” during Night Only
Catalog Value [dB]
X1: Auxiliary Relay
SS3: Low Noise Switch
Control Circuit
X1
2
3
1
2
3
3P Connector
Outdoor Unit
PCB
CN17
SS3
Power
Source
X1