Omron E5ZD, Operation Manual

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127
Heater Burnout Detection Doesn’t Work Properly
Possible cause Remedy Reference
Current Transformer is not connected properly. Correctly wire Current Transformer. Sec. 3-5
E54-CT2 is being used. Only E54-CT1 and E54-CT3 can be used as Current
Transformers. Sec. 1-4-3,
App. A
HB and HS alarms have not been made op-
erational. Use Alarm Point Write (WU) to make alarms operational. Sec. 4-2-7
Setting for heater burnout detection level is
0.0 A. With a setting of 0.0 A the HB alarm is invalid. Make the
proper setting. Sec. 4-2-28
Setting for heater burnout detection level is
incorrect. Take into account variations in measurement and fluctua-
tions in heater power supply voltage. Allow for a 1 A fluc-
tuation due to ambient temperature influences. Sec. 1-4-3,
3-5-4
HB and HS alarms were made operational be-
fore heater was turned on. Turn on heater first. Sec. 1-4-3
Control output is not being used. HG and HS alarms are synchronous with control output,
so control output must be used. Sec. 3-5-4
Operation is not starting. Start operation with OS command. Sec. 3-5
Control output was ON for less than 200 ms. HB alarm detection will not operate unless control output
stays ON for 200 ms. Sec. 3-5
Control output was OFF for less than 200 ms. HB alarm detection will not operate unless control output
stays OFF for 200 ms. Sec. 3-5
Heater current exceeds 50 A. To avoid damage, do not run a current of over 50 A. App. A
Heater’s rated current and actual current differ. Use Heater Current Read to check actual heater current,
and set detection level accordingly. Sec. 4-2-30
Troubleshooting Lists
Section 6-1