CHAPTER 5: MAINTENANCE
IS-300CA INVERTER POWER SUPPLY
990-
418
5-3
FAULT
CODE
CONTENTS
CAUSE
MEASURES
E-12
STOP
External STOP input circuit is open.
Rectify cause of STOP, and then close STOP
circuit.
Power supply for external input is not
connected.
Check external input signal for proper
connection.
E-13
OVER
CURRENT
Primary current above the limit is
detected.
Check for welding transformer and welding
electrode problems.
Check that the toroidal coil or the voltage
detecting cable is connected in the secondary
control.
E-14
SHORT WITH
GROUND
The output cable between the welding
transformer and the power supply is
grounded.
Check the output cable.
E-15
LACK OF
COOLING
WATER
Flow Switch in Cooling water in pipe
detects low flow.
Increase cooling water flow rate to meet
specifications.
Power supply for external input is not
connected.
Check external input signal for proper
connection.
E-16
START ERROR
Schedule signal is not present when the
external start signal is present.
Input schedule signal present before start
signal. See
Chapter 3, Section 4
for details.
E-17
AC 50/60
FREQUENCY
FAILURE
Frequency of incoming power supply is
not stable, and equipment cannot
determine whether it is at 50 Hz or 60 Hz.
Check power consumption to determine
whether it is used at the contract level.
E-18
OUT LIMIT OF
VOLTAGE
ERROR
Secondary voltage is out of the
VOLT
setting range on the
MONITOR SET
screen.
Check for stained welding electrode and low
electrode force.
E-19
OUT LIMIT OF
POWER
ERROR
Welding power is out of the
POWER
setting range on the
MONITOR SET
screen.
E-20
INTERRUPT
ERROR
The current shutoff signal is present prior
to the start signal.
Check interrupt input signal.
E-21
NO VOLTAGE
No detection of the voltage across
welding electrodes.
Verify the voltage detection cable is
connected across the welding electrodes.
NO VOLTAGE LEVEL
is high.
Set a lower
NO VOLTAGE LEVEL
.
E-22
OVER
CURRENT
(DC24V)
Built-in 24 VDC power supply on the
rear panel is shorted and overloaded.
Turn off the power and check the I/O
connection on the rear panel.
E-23
SHORT
CIRCUIT
The output cable is shorted.
Check the output cable.
Summary of Contents for IS-300CA
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