Omron E5AC-T User Manual

A - 15
A Appendices
E5@C-T Digital Temperature Controllers User’s Manual (H185)
A-5 Troubleshooting
A
A-5 Troubleshooting
Checking Problems
If the Digital Controller is not operating normally, check the following points before requesting repairs. If
the problem persists, contact your OMRON representative for details on returning the product.
* Also refer to the E5 @ C-T Digital Temperature Controllers Communications Manual (Cat. No. H186) for details.
Timing Status Meaning Countermeasures Page
Turning
ON the
power for
the first
time
Temperature error is
large.
Input error (S.Err display)
Input type mismatch Check the sensor type and reset the input type correctly. 4-19
Thermometer is not
installed properly.
Check the thermometer installation location and polarity
and install correctly.
2-8, 2-12
Communications are not
possible.
Non-recommended
adapter is being used.
Make sure that the connected device is not faulty. *
During
operation
Overshooting
Undershooting
Hunting
ON/OFF control is
enabled (default: PID
control selected).
Select PID control and perform autotuning. 4-49
Control period is longer
compared with the speed
of rise and fall in
temperature.
Shorten the control period. A shorter control period
improves control performance, but a cycle of 20 ms
minimum is recommended in consideration of the service
life of the relays.
4-22
Unsuitable PID constant Set appropriate PID constants using either of the following
methods.
• Execute AT (autotuning).
• Set PID constants individually using manual settings.
4-49
HS alarm operation fault Use breeder resistance if the problem is due to leakage
current. Also investigate the errors detected by the HS
alarm function.
4-66
Temperature is not rising Specified operation is
unsuitable for required
control (default: Reverse
operation).
Select either forward or reverse operation depending on
the required control. Reverse operation is used for heating
operations.
4-22
Heater is burnt out or
deteriorated.
Check whether heater burnout or deterioration have
occurred. Also investigate the errors detected by the
heater burnout alarm.
4-64
Insufficient heater
capacity
Check whether the heater's heating capacity is sufficient. ---
Cooling system in
operation.
Check whether a cooling system is operating. ---
Peripheral devices have
heat prevention device
operating.
Set the heating prevention temperature setting to a value
higher than the set temperature of the Digital Controller.
---

Omron E5AC-T Specifications

General

Brand	Omron
Model	E5AC-T
Category	Temperature Controller
Language	English