Hand Extruder MEK-40,65 / MAK-40,65
Page 16/20
Issue 08.2008/Rev. 01
MUNSCH Kunststoff-Schweißtechnik GmbH
7 Malfunctions, Causes and Remedies
7.1 Trouble-shooting
The following table lists potential operating upsets of
the hand extruder, possible causes and their reme-
dies (fault diagnosis chart).
Should malfunctions occur which are not covered
here or which cannot be traced back to the cause
stated, please contact MUNSCH Kunststoff-
Schweißtechnik GmbH.
Malfunction
Fault No.
Drive motor does not start
5, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 23, 25
Drive motor switches off
5, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 23, 25
No welding rod feed
1, 16, 17, 20
No extrudate conveyed out of welding shoe
1, 16
Extrudate output decreases during operation
1, 14, 16
No air supply
6, 7, 13
Integrated air supply without function
5, 22
No hot air
2, 3, 4, 5, 6, 18, 22
Hot air temperature below setpoint temperature
2, 3, 4, 8, 10, 18, 22, 14
Melt temperature below setpoint temperature
2, 3, 9, 11, 14
Extruder does not heat up
2, 3, 12, 22
Temperature above preset range
2, 3, 18, 19
Controller fault signal: E
2
Controller fault signal: OEAIR
2, 13, 22
Controller signal: OFF
9, 10, 11, 12
Control fluctuates
3, 13,19,12
7.2 Fault diagnosis
Fault
No.
Possible causes
Remedies
1
Smaller or too small a welding rod diameter
Use larger welding rod diameter, if necessary
2
Temperature sensor defective
1)
3
Temperature controller defective
1)
4
Air rate too high
Reduce air rate to specified level
3)
5
Cable connections defective
Check cable connections
1)
6
External air supply not connected
3)
Connect external air supply
7
External air supply without function
3)
Switch on external air supply
Check the external air supply system for malfunc-
tions using the separate manual, or have it checked.
8
Hot air temperature below start interlock tem-
perature
Allow hand extruder to heat up
Air rate too high
→
reduce air rate
3)
1) Consult MUNSCH Kunststoff-Schweißtechnik GmbH
2) Only for MAK
3) Only for MEK