Operation Display Panel; Alarm; Maintenance - SMC Networks HEF Series Manual

HEF
Series

Operation Display Panel

1st line
Displays the current temperature value
[PV]
Displays the alarm code when an alarm
is generated
RUN display
Turns on during control status (RUN status)
RUN/STOP key
For switching the control status (RUN/STOP)
MODE key
For switching the screen
It can be switched between the parameter
screen and operation mode screen when
it is pressed for two seconds.

Alarm

This product can display eight types of alarm codes and they can be read using serial communication.
In addition, it can relay output as an alarm contact output when an alarm is generated.
Alarm
Alarm code Alarm description
AL0 Memory error
AL1 Controller error
AL2 Temp. sensor disconnection alarm
AL3 Temp. sensor short circuit alarm
AL4 Temp. sensor high temp. error alarm
AL5 Temp. sensor low temp. error alarm
AL6 Low fluid level alarm
AL7 Thermostat alarm

Maintenance

The maintenance of this unit can only be performed by returning it to be repaired at one of SMC's sites. As a rule, SMC will not
conduct on-site maintenance.
9
Operation
status
Stop There is an abnormality with the memory data in the controller due to a high level of noise.
Stop There is an abnormality with the data in the controller due to a high level of noise.
Stop The temperature sensor has been disconnected or short-circuited.
Stop There is a short-circuit in the temperature sensor.
Stop The temperature sensor has exceeded the high temperature cutoff setting.
Stop The temperature sensor has exceeded the low temperature cutoff setting.
Stop The amount of circulating fluid in the tank has dropped.
The thermostat has activated due to clogging of the heat sink of the filter or product, or failure
Stop
of the fan or pump.
2nd line
Displays the setting temperature value
[SV] and each selected input value
ALARM display
Turns on when the unit is alarming
key (UP key)
Increases set data
key (DOWN key)
Decreases set data
Main reason