page 36
Cooling unit
At watercooled machines, the flowrate of the cooling liquid is measured in the return flow. The flowmeter output is
a digital signal where it’s frequency is proportional to the flowrate. The higher the flowrate, the higher the frequen
-
cy. If the flowrate is below 0.3 liter per minute, the machines will stop and dislays
E05
(cooling system error).
Schematic (internal cooling unit)
X12 / 2
X12 / 3
X12 / 1
X12 / 4
2
3
1
+15V
+15V
MASTER
DK-MAPRO
identification
“gascooled“
tank
pump
hose connector
blue
hose connector
red
flow meter
cooler
Schematic (external cooling unit “WUK“)
X12 / 2
X12 / 3
X12 / 1
X12 / 4
2
3
1
X1 / 4
X1 / 5
X1 / 3
X1 / 6
WUK
+15V
+15V
MASTER
DK-MAPRO
X7 / 4
X7 / 5
X7 / 3
X7 / 6
X1 / 1
X1 / 2
X5 / 2
X5 / 4
X7 / 1
X7 / 2
X10 / 1
X10 / 2
X6 / 1
X6 / 3
42V AC
power source
tank
pump
hose connector
blue
hose connector
red
flow meter
cooler
At gas cooled machines, a small cable bridge is shorting pins 1 and 4 at connector X12, instead of a flow meter.
This is the identification to deactivate the monitoring of the flow meter.
At the V mobile machines, this identification is used to detect if an external water cooling unit is attached or not.
In this case the cable bridge has the opposite meaning: “water cooled“. This is the reason for setting the DIP
switch 4 on the DK-MAPRO board:
OFF = internal cooling system (“driveable machines“)
ON = external cooling system (“mobile machines“)
Summary of Contents for V Series
Page 1: ...Service Manual V Series 909 0340 1 05 ...
Page 47: ...page 47 ...
