Fronius FK 4000 - Coolant Flow and Cooling Power Problems

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EN
Insufficient or no coolant flow
Cause: Coolant level too low
Remedy: Top up 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 contaminated
Remedy: Change the coolant
Cause: Coolant filter displaced when connecting coolant return
Remedy: Clean coolant filter using clean tap water or change filter element
Cause: Coolant pump is jammed (FK 4000 R, FK 4000 R US and FK 4000 Rob only)
Remedy: Turn coolant pump shaft (see operating instructions, "Turning coolant pump
shaft" section). Contact after-sales service if the coolant pump shaft proves
impossible to turn
Cause: Coolant pump defective
Remedy: Contact after-sales service
Cause: Permitted duty cycle exceeded
Remedy: Wait until the end of the coolant pump cooling phase
Cause: Flow sensor has tripped, requesting parameter F3 from the welding system
shows that there is nothing flowing through: Coolant pump defective
Remedy: Contact after-sales service
Cause: Flow sensor has tripped, requesting parameter F3 on the power source
shows that there is still a small amount flowing through: coolant hoses kinked
or coolant filter displaced when connecting coolant return
Remedy: Repair coolant hoses, clean coolant filter using clean tap water or change fil-
ter element
Insufficient cooling power
Cause: Faulty fan
Remedy: Contact after-sales service
Cause: Coolant pump defective
Remedy: Contact after-sales service
Cause: Cooler contaminated
Remedy: Gas purge cooler with dry compressed air
Cause: Cooling capacity of connected cooling unit not high enough
Remedy: Use a cooling unit with a greater cooling power