Mitsubishi Electric CAHV-P500YB-HPB, Service Handbook

Page: 108 / 169

[
VII
Control ]
- 101 -
HWE15070 GB
Operation Mode
-14- Controlling the operation of unit using external water temperature sensors
The water temperature can be controlled using the built-in sensor on the unit or a separately sold external water temperature
sensor.
The factory setting for the sensor option is "built-in sensor on the unit." (SW2-8: OFF)
To control the water temperature with an external water temperature sensor, set SW2-8 to ON.
(Note) If the settings for the dip switches are changed while the power to the circuit board is being supplied, reset the unit
according to the instructions in [6] (5) "Re-initializing the system" (page 24).
A separately sold water temperature sensor "TW-TH16" will be required to control the water temperature based on the exter-
nal water temperature reading.
It is possible to switch between two external water temperature sensors. Refer to the installation manual for how to set the
sensors.
Install the external water temperature sensor and wiring according to the instructions on the next page.
Operation Mode
-15- Remote water temperature setting input signal type
By setting SW2-7 to ON, external analog signals can be used to set the water temperatures.
Analog input type can be selected from the following four types:
"0": 4-20 mA
"1": 0-10 V
"2": 1-5 V
"3": 2-10 V
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