EWM LP-XQ Operating Instructions Manual page 66

Rectifying faults
Error messages (power source)
Category
a) b)
7
8
9
10
11
22
32
33
38
48
49
51
66
Error Possible cause
c)
Low coolant le- Flow rate too low (< = 0.7 l/min)
vel / (< = 0.18 gal/min)
Coolant volume too low
Pump does not run
Air in the coolant circuit
Hose package not completely
filled with coolant
Operation with gas-cooled
welding torch
Failure of automatic circuit-
breaker
Shielding gas No shielding gas
error
[2]
Pre-pressure too low
Sec. overvol- Overvoltage at output: Inverter
tage error
Earth fault (PE Connection between welding
error) wire and machine casing
Quick shut- Removing the logical signal "ro-
down bot ready" during the process
Coolant excess Coolant is overheating (>=70°C
temperature [3] / >=158°F)
coolant return line
Fan blocked, dirty or defective
Air inlet or outlet blocked
Error I>0 [3]
Error UIST Short circuit in welding circuit
[3]
before welding
Error IIST [3] Short circuit in welding circuit
before welding
Ignition error No ignition occurred during a
process start with automated
machines
Arc interruption An arc interruption occurred
during welding with an automa-
ted system
Emergency The emergency stop circuit of
stop the power source has been ac-
tivated.
[1] [3]
[4]
[1] measured in the
Remedy
Check coolant flow, clean wa-
ter block, remove kinks in
hose package, adjust flow
threshold
Fill coolant
Turn the pump shaft
Vent coolant circuit
Switch machine off / on (pump
runs for 2 min)
Connect coolant feed and
coolant return (insert hose
bridge); deactivate water
block
Press to reset automatic cir-
cuit-breaker
Check shielding gas supply
Remove kinks in the hose
package; nominal value:
4-6 bar primary pressure
Inform Service
Remove electrical connection
Eliminate errors on the higher-
level control
Allow the power source to
cool down (mains switch to
"1")
Check fan, clean or replace
Check air inlet and outlet
Inform Service
Eliminate short circuit in
welding circuit; remove exter-
nal sensor voltage
Eliminate short circuit in
welding circuit
Check the wire feeding, check
the connections of the load
cables in the welding circuit,
clean corroded surfaces on
the workpiece before welding
if applicable
Check wire feeding; adjust
welding speed.
Disable the activation of the
emergency stop circuit (re-
lease protective circuit)
099-5TLPXQ-EW501
29.01.2021