93
Orbital welding gun or torch gets very hot
Cause: The design dimensions of the orbital welding gun or torch are not
sufcient for this task
Remedy: Observe the duty cycle and loading limits
Cause: Only on water-cooled machines: Water ow rate is insufcient
Remedy: See “Water ow too low or non-existent” below
Cause: Only on water-cooled machines: Parameter C-C is set to “OFF”.
Remedy: In the Set-up menu, set parameter C-C to “Aut” or “ON”.
Water ow too low or non-existent
Cause: Coolant level too low
Remedy: Top up with coolant
Cause: Constriction or foreign body in cooling circuit
Remedy: Remove constriction or foreign body
Cause: Coolant pump fuse defective
Remedy: Replace coolant pump fuse
Cause: Coolant pump defective
Remedy: Replace coolant pump
Cause: Coolant pump sticking
Remedy:
- Remove coolant pump fuse
- Insert a suitable slotted screwdriver from outside through the motor
shaft bushing
- Tighten motor shaft
- Replace coolant pump fuse
Cause: Coolant lter (option) displaced when connecting water return
Remedy: Clean coolant lter using clean tap water or change lter element
Cause: Flow sensor has tripped (FK 4000 Rob), requesting parameter F3 from
the welding system however shows that there is still a small amount
owing through: hoses kinked or coolant lter displaced when connect-
ing water return.
Remedy: Fix hoses, clean coolant lter using clean tap water or repair lter
element
Cause: Flow sensor has tripped, requesting parameter F3 from the welding
system shows that there is nothing owing through: coolant pump
defective.
Remedy: Replace coolant pump
Cause: Permitted duty cycle exceeded
Remedy: Wait until the end of the coolant cooling phase
Displayed service
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