Cooling System - Pilous ARG 380 Plus S.A.F. Instruction Manual

Display and elimination of frequency converter faults
Error display Fault name and description
OC Overcurrent (OC)
Converter output current is equal to or higher than 200%
of nominal output current.
OU Overvoltage (OV)
DC voltage of the main curcuit has reached the overvoltage
detection level (410 Vdc)
uU1 Main circuit undervoltage (UV1)
DC voltage of the main circuit has reached the undervoltage
detection level.
Oh Converter superheating (OH)
Ol1 Motor overload (OL1)
Electronic thermal relay has released the function of motor
overload protection.
Ol2 Converter overload (OL2)
Electronic thermal relay has released the function of converter
overload protection.
Ol3 Detection of moment exceeding (OL3)
gf Ground fault (GF)

5.10. Cooling System

The pump and the coolant tank, which are mounted in the machine base,
are the basic elements of the cooling system. The coolant tank can be dis-
mantled separately from the pump. The coolant pump carries the coolant
via hoses, cocks and guide heads to the saw blade. In addition to the main
cooling via the guide heads, there is an auxiliary cooling system. The coo-
lant quantity is regulated by the cocks. The coolant cools and lubricates the
saw blade and flushes the metal chips. The pump switches on and off when
the saw blade drive is started or shut down.
Pump
Overflow opening
Possible cause and how to eliminate it
Short-circuit or ground leakage at converter output. The converter
output circuit is damaged.
Supply voltage is too large.
The supply of one phase of the converter supply source is
interrupted; the terminals of the inlet supply lead are loose or the
supply cable is disconnected. A short-time power failure.
The ambient temperature is too high. Excessive overload.
The converter cooling fan does not work.
Excessive overload.
Excessive overload.
The mechanical system is locked or there is a fault.
Ground fault at converter output.
The overflow opening bored in the coolant tank provides for the sup-
ply of the appropriate quantity of coolant in order that the pump
overflow is prevented (the pump could burn). If too much coolant is pou-
red in, the coolant will flow out below the band saw.
When coolants are handled, the exposure to dangerous substances
cannot be excluded. Observe in your own interest the instructions
and recommendations of the producer or your company referring to safe
coolant handling.
Supply hose
Cock
21
Auxiliary cooling
Sieve
Coolant tank
Discharge hose