Omron E5L Series, Quick Start Manual

E5L

6

Setting Protection

1.

Setting Protection (Process Value Display)

Press the 

 and 

 Keys simultaneously while the process 

value is being displayed to change to the setting protection state.

2.

Setting Protection (Set Temperature Display)

From the Setting Protection (process value display) Mode, press 
the 

 and 

 Keys simultaneously to change to the setting 

protection (set temperature display) state.

3.

From the Setting Protection (set temperature display) Mode, press 
the 

 and 

 Keys simultaneously to return to the process 

value display with no setting protection.

Note: 1.

Setting protection disables key operations to prevent the 

settings from being changed accidentally. 

 will be lit 

while protection is in effect.

2.

Protection will be maintained even when the power supply 

is turned OFF and ON.

Error Displays and Causes

E5L-A

@

When a thermistor disconnection occurs, the built-in relay operates at the OFF side (when NO contacts are used).

E5L-C

@

When an error occurs, the display shows the error code. Take the necessary measures, referring to the following table.

Note: 1.

Errors are not displayed while settings are being changed, except for memory errors. The control output status will be as shown in the 

above table while the set temperature or hysteresis is being set. The control output will be OFF while the temperature input shift or direct/

reverse operation setting is being set. Key operations will be possible when an error occurs, except for a memory error.

2.

The setting protection indicator (

) and set value indicator ("SV") will be continued even when settings are protected, except when a 

memory error occurs.

Display example

Display

Process value display

Set temperature display

Thermistor

NO contacts 

(Terminal numbers 8 and 12)

*

 Heating load

NC contacts 

(Terminal numbers 4 and 12)

*

 Cooling load

Disconnection

OFF

ON

Short-circuit

OFF

ON

Display

Meaning

Cause

Control output

FFF (lit)

Overflow

The process value is higher than the set 

temperature range.

Reverse operation: OFF

Direct operation: ON

--- (lit)

Underflow

The process value is lower than the set 

temperature range

Reverse operation: ON

Direct operation: OFF

FFF (flashing)

Thermistor short-

circuited

The thermistor is short-circuited.

Reverse operation: OFF

Direct operation: OFF

--- (flashing)

Thermistor 

disconnected

The thermistor is disconnected.

Reverse operation: OFF

Direct operation: OFF

E11 (lit)

Memory error

The thermostat has failed.

OFF