Mitsubishi Electric CRHV-P600YA-HPB Service Handbook page 90

[ VII Control ]
(8) Setting the water temperature using analog signal input
• When dip switch SW2-7 is set to ON (Enable external input) and item code 1051 is set to "0", 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 4 mA: Preset temp. A (Item code 11)
• External analog input signal of 20 mA: Preset temp. B (Item code 13)
• External analog input signal of between 6 and 18 mA: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
*Due to the resistance of the wire that is connected to the 4-20 mA analog input, the preset temperature may not properly be
sent. If this is the case, check the current value of the analog input, and adjust the output current value of the connected 4-
20 mA signal output device.
Refer to the tables below for how to display the current value of the analog input.
Switch settings
Item that can monitor
Current value of analog
signal input
• When the water temperature setting input signal type is set to 1 (0-10 V)
• External analog input signal of 0 V: Preset temp. A (Item code 11)
• External analog input signal of 10 V: Preset temp. B (Item code 13)
• External analog input signal of between 1 and 9 V: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
• When the water temperature setting input signal type is set to 2 (1-5 V)
• External analog input signal of 1 V: Preset temp. A (Item code 11)
• External analog input signal of 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.
Preset temp B
Preset temp A
• When the water temperature setting input signal type is set to 3 (2-10 V)
• External analog input signal of 2 V: Preset temp. A (Item code 11)
• External analog input signal of 10 V: Preset temp. B (Item code 13)
• External analog input signal of between 3 and 9 V: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
HWE1312A
4 mA 6 mA 18 mA 20 mA Input current
SW2
-10 5
OFF OFF OFF
Item
Unit
code
c15 mA
0 V 1 V 9 V 10 V Input voltage
1 V 1 .5V 4.5 V 5 V Input voltage
2 V 3 V 9 V 10 V Input voltage
SW3
6 7 8
OFF OFF
- 83 -
9 10
ON ON
GB