LORCH S-Pulse User Manual

Troubleshooting
- 52 - 02.20909.2710.1-06
9.5 Cooling unit
At watercooled machines, the flowrate of the coolant 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 frequency.
If the flowrate is below 0.3 liter per minute, the machines will stop and dislays E05 (cooling system error).
Schematic internal cooling unit
The actual flowrate can be monitored via the front panel in menu Extras, Diagnosis, Flowrate Cool.System.
At gas cooled machines instead of the flowmeter, there is a small cable bridge between pin 1 and 4 at con
-
nector X9. This cable bridge is deactivating the monitoring of the flowmeter.
Schematic external cooling unit
X9 / 2
X9 / 3
X9 / 1
X9 / 4
2
3
1
X1 / 4
X1 / 5
X1 / 3
X1 / 6
WUK
+15V
+15V
MASTER
DP-MAPRO
X8 / 4
X8 / 5
X8 / 3
X8 / 6
X1 / 1
X1 / 2
X5 / 2
X5 / 4
X8 / 1
X8 / 2
X13 / 1
X13 / 2
X6 / 1 X6 / 3
42V AC
230V
power source
tank
pump
hose connector
blue
hose connector
red
flow meter
cooler
At “mobile“ machines the bridge between pin 1 and 4 is used to detect if an external cooling unit (WUK) is
attached or not. Therefore the DIP switch 4 on pc-board MAPRO must be set: ON = mobile OFF = “drive-
able“ (see also “DIP switch” on page 17).

LORCH S-Pulse Specifications

General

Brand	LORCH
Model	S-Pulse
Category	Welding System
Language	English