IS-200A
12. Troubleshooting
12-3
Fault
code
Contents Cause Measures
E-15 Flow switch error
Cooling water flow in pipe to which
flow switch is installed is low.
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
Schedule signal
input error
Schedule signal is not input when
external start signal is input.
Input schedule signal before start
signal. (See 4. (7)(e).)
E-17
Input power supply
error
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 Voltage error
Secondary voltage is out of VOLT
setting range on MONITOR SET
screen.
Check for stained welding electrode
and low electrode force.
E-19 Electric power error
Welding power is out of POWER
setting range on MONITOR SET
screen.
E-20 Welding stop error
The current shutoff signal is input
prior to the start signal.
Check interrupt input signal. (See 4.
(7)(e).)
E-21 No voltage error
No detection of the voltage across
welding electrodes.
NO VOLTAGE is high.
Make sure that the cable detecting
the voltage across welding electrodes
is connected.
Set a lower NO VOLTAGE.
E-22 24VDC overcurrent
Built-in 24 V DC 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
Setting data range
error
There is a data outside the range in
the welding schedule data.
Check all the settings.
If the data in memory is damaged, the
following are possible causes:
Generation of powerful power
supply or electrostatic noise
Abnormal supply voltage
resulting, for example, from
lightening or induced lightening
Flash memory’s rewrite limit
exceeded
If the error occurs again after
initialization, the Power Supply needs
repair. Contact us.
E-28
Monitored data
error
Monitor data and count data stored
into memory is damaged.
Data is lost since the retention period
is expired. The retention period is 10
days after the power id turned off. If
the error occurs frequently, the Power
Supply needs repair. Contact us.
E-30
Dedicated
transformer
thermostat error
[SENS] cable is disconnected.
Check the [SENS] cable connected to
the dedicated transformer.
Temperature of welding
transformer rises and internal
thermostat input circuit opens.
Lower temperature of transformer.
Refer to the operation manual for the
transformer to ensure that the duty
cycle does not exceed the specified
value.
* An error cannot be reset through the I/O. You can reset an error through the MA-627A or
the [TROUBLE RESET] key on the front panel.
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