ZYMBO AATT Ventilarredo RX-200/ECO, Service Manual

Page: 94 / 94

ZYMBO AATT
Ventilarredo Service Manual – English Pag. 94
8.3 CONTROL FUNCTION
1) L/N for unit: Supply the electrical power to unit and wall pad.
2) L/N for wall pad: Supply electrical power to wall pad.
3) Input from wire wall pad: The input signal from wire wall pad is force electricity. High, middle and low
speeds for motor, valve1 and valve2, all these input are force electricity. PCB would check the voltage
signal from these positions, and motor would work with corresponding speed, also valve1 or valve2 would
work accordingly. When wall pad is switched off, unit also stops working.
4) Motor input/output: Motor input and output are connected together for each speed, such as high speed,
middle speed and low speed. So, next slave unit could be connected. Then, master unit and all slave units
would work with same fan speed.
5) Motor: Fan motor is PG motor, controlled by Triac. High speed:850rpm, Med speed:700rpm, Low
speed:500rpm
6) Valve connection: Connected with valve1 and valve2. When there is electrical power supplied to valve1
or valve2, the valve would work accordingly. For 2 pipes system, Valve should be connected with VAL2
position. For 4 pipes system, cold water valve should be connected with VAL1 position, and hot water
valve should be connected with VAL2 position.
7) Static switch: On the PCB, there is a 5V DC static switch to control the fan ON/OFF. During heating
mode, with OFF station, unit will work with static heating mode accordingly.
Important note for static switch:
4 pipe system: Valve1 is connected with cooling, and valve2 is connected with heating. Switch control is valid
only when Valve2 is connected with force electricity.
2 pipe system: Valve should be connected with valve2. (During cooling mode, do not use this static switch. A
label would be fixed to tell user no use this switch during cooling mode.)