DDPHCL2_man_r1.0 – 03/2021
Page 10
INTERNAL CONNECTIONS (for technical personnel only)
The unit is provided prewired internally, and all connections of normal use (power supply, measurement
sensors and level sensors) are available externally via cable or connector.
However, if you need to operate on the electronic boards or replace blown fuses, refer to the diagram
below.
Notes:
•
The possible reversal of the connections line / neutral of the power supply does not affect the normal
operation.
•
If the level and flow inputs are not used, leave them open (not connected).
START-UP
At start-up the microcontroller displays for a couple of seconds information about the firmware (type /
version), then shows the two measures flashing for all the start-up delay time (if set) and then starts
operating accordingly with the configured working mode.
Reserved
Power
Transformer
Fuse F1A
Y/G L N
Pump 1
Y/G N L
Power Supply
µProcessor
B
r
B
k
B
l
F
lo
w
+ -
Level 1
Connector for front board flat cable
Y/G L N
Pump 2
IN pH
IN RX
R
e
s
e
rv
e
d
+
-
L
e
v
e
l
2
