Omron G3PW - MANUAL 2 User Manual page 108

Detailed Descriptions of Errors
E20: Heater
Overcurrent Error
E30: Zero Cross Error
E31: Frequency Error
E40: Heater Burnout
Alarm
Is a value greater
than (90/number of heater elements) set for
the Heater Burnout Threshold parameter
Stop operation and check
the power flow to all
Is there burnout
at some or all of the
Replace the heaters.
2. Set the output mode to a mode other than constant current.
Press the LVL Key for at least 2 s to enter the initial setting mode. Select 0
(Proportional to phase angle) in the Output Mode Selection parameter
[P02].
3. If an E10 (SSR short-circuit) error occurs after restarting, there is a high
probability of heater burnout.
4. Return the output mode to constant current mode.
A heater overcurrent error occurs when the load current exceeds 120% of the
rated current for 250 cycles (approx. 5 s). Reduce the input value and then
perform a reset operation (using the ENT/RST Key, a reset input, or a reset
command via communications).
If the load current becomes too large, consider using the duty setting or output
limit function.
A zero cross error occurs when there is a failure to detect the power supply
zero cross point. Check whether the power supply waveforms are irregular,
and perform a reset operation (using the ENT/RST Key, a reset input, or a
reset command via communications).
A frequency error occurs when the power supply frequency is outside of the
range of 47 to 63 Hz and the frequency fluctuates at a rate of 3 Hz/s or
greater.
Confirm that the power supply frequency is stable, and then perform a reset
operation (using the ENT/RST Key, a reset input, or a reset command via
communications).
When a heater burnout alarm error (E40) occurs, use the following procedure
to remove the problem.
Start
(HBR)?
Yes
heaters.
No
heaters?
Incorrect detection may be occurring at
Heater Burnout Detection Limit (HBL)
Yes
little by little (by approx. 10%) and
narrow the burnout detection range. If
the conditions do not change, re-teach
Set the Heater Burnout Threshold
No
parameter (HBR) according to the number
of heaters. (Burnout detection becomes
more difficult as the value is increased.)
Restart operation.
Is an alarm occurring before
the output value has
finished rising?
Yes
small output values. Increase the
the heater characteristics.
Section 7-3
No
The resistance may be unstable.
Extend the time until burnout is
determined. Set a larger value in
the Number of Alarms for Heater
Burnout Detection parameter [P09].
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