Mitsubishi Electric CAHV-P500YB-HPB, Service Handbook

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[
VII
Control ]
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HWE15070 GB
(8) Setting the water temperature using analog signal input
Select the analog input format
• When dip switch SW2-7 is set to ON (Enable external input), the target water temperature varies with the preset
temperatures A and B and the type of analog input signal.
• When the water temperature setting input signal type is set to 0 (4-20 mA)
• External analog input signal of 5.9 mA: Preset temp. A (Item code 11)
• External analog input signal of 18.3 mA: Preset temp. B (Item code 13)
• External analog input signal of between 5.9 and 18.3 mA: the preset temperature will be linearly interpolated.
• When the water temperature setting input signal type is set to 1 (0-10 V)
• External analog input signal of 1.0 V: Preset temp. A (Item code 11)
• External analog input signal of 9.1 V: Preset temp. B (Item code 13)
• External analog input signal of between 1.0 and 9.1 V: the preset temperature will be linearly interpolated.
• When the water temperature setting input signal type is set to 2 (1-5 V)
• External analog input signal of 1.5 V: Preset temp. A (Item code 11)
• External analog input signal of 4.5 V: Preset temp. B (Item code 13)
• External analog input signal of between 1.5 and 4.5 V: the preset temperature will be linearly interpolated.
3 W S 2 W S
-10 5 6 7 8 9 10
Switch settings OFF OFF OFF OFF OFF ON OFF
Items that can be set
Item
code
Initial
value
Unit
Setting
Note
Setting change from
an optional remote
controller
Incre-
ments Lower
limit Upper
limit
Select the analog input
format
1051 0 1 0 3 Not possible
Select "0"
0: Water temperature input 4-20 mA
1: Capacity control input 4-20 mA
2: Water temperature input IT terminal
3: Capacity control input IT terminal
Preset temp B
Preset temp A
5.9 mA Input current 18.3 mA
Preset temperature = (B - A) * (Input current - 5.9 mA) / 12.4 mA + A
Change of 0.12 mA or less is not recognized.
Preset temp B
Preset temp A
1.0 V Input voltage 9.1 V
Preset temperature = (B - A) * (Input voltage - 1.0 V) / 8.1 V + A
Change of 59 mV or less is not recognized.
Preset temp B
Preset temp A
1.5 V Input voltage 4.5 V
Preset temperature = (B - A) * (Input voltage - 1.5 V) / 3.0 V + A
Change of 29 mV or less is not recognized.
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