Compressor operation sign
Fan motor operation sign
Electric heating operation sign
AUTO RESTART sign. When the system is set at AUTO RESTART mode, if the power supply is cut
down, when the power comes back again, the system will resume the operation mode before the power is
Wired controller buzzer closed sign
Hint sign of password input. When modifying the factory parameter, the password must be filled in.
Fan coil simultaneous control sign. The system can be set to start up following the fan coil startup.
When one of fan coils is started up, the system will be started up too. When all the fan coils stop, and
after a while, the system will stop automatically. Also the system can be connected to a remote control
Telephone remote control sign. If the wired controller is equipped with a remote control card, it can
realize the telephone remote control function.
Time sign. It can display the real time and the auto switch on/off time, also it can display
the parameter when setting the parameter and querying the parameter.
Auto switch on/off and clock sign. It is used to set the switch on/off and the real time clock.
C, D, E, F, G, H), COM is used to indicate the communication failure (plus A, B, C, D, E, F, G, H),
flow is used to indicate the flow failure (plus A, B, C, D, E, F, G, H).
temperature overheat (plus A, B, C, D, E, F, G, H or 9, or 10); over is used to indicate the
compressor or fan motor overload (plus the corresponding signs).
13.3 I/O port description of UHR-820S control board
Fin temp. sensor model: DTN-C502H3T-ACU123B 5KΩ B=3470
Discharging temp. sensor model: DTN-G514H8A-ACU104H 50KΩ B=4450
system total outlet water temp.;
AI3: 1# system water return temp.;
Indication sign, SYS is used to indicate the module of the system (plus A, B,
Indication sign, vent is used to indicate the discharging