76
Parameter U: Heater disconnection amount
Set the threshold for the disconnection detection. The threshold needs to be set according
to the number of heaters connected in parallel. Set the threshold with the following table as
a reference.
Number of heaters connected in parallel
(total of A and B)
U: Heater disconnection amount
3
16%
4
12%
5
10%
6
8%
7
7%
8
6%
9
5%
10
5%
The above settings are approximate values. The value to set may need to be adjusted
according to the actual usage conditions.
After configuring settings, perform the test operation in the following procedure to check
if detection is performed normally.
Step 1:
Perform operation for at least 5 minutes with the number of parallel-
connected heaters used to set parameter U.
Step 2:
Check that error code Er.13 is not displayed.
If error code Er.13 is displayed, review the connection and the settings of the
numbers of heaters.
Step 3:
After stopping operation and the power supply, remove one heater A unit.
(This simulates heater disconnection.)
Step 4:
Perform operation for at least 5 minutes with the absence of one heater.
Step 5:
Check that error code Er.13 is displayed.
If error code Er.13 is not displayed, increase the setting of [Parameter U] by
1% and save the new setting. Repeat steps 4 and 5 until the error code is
displayed.
Step 6:
After completing the test operation, connect the removed heater again.
Summary of Contents for CALPOTE UG Series
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