“Confidential, Do Not Duplicate without written authorization from NEC.”
8-18
CIRCUIT DESCRIPTION
!
Status LED driver circuit
Under the control from the CPU PWB, the Status LED located behind the set is turned ON/OFF.
Basically, the LED is lit in green under normal conditions, in orange for alarming, and in red with an error.
@
T-SENS PWB interface
In addition to the above-mentioned thermostat in the set, temperatures are supervised by five T-SENS PWBs.
Since the T-SENS PWB has the same address for I2C protocol communication, a changeover circuit is
installed.
The range of temperature sensing is –10° to 100°.
To Next Page
Loading...
