Alarm
Operation Display Panel
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.
RUN/STOP key
For switching the control status (RUN/STOP)
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)
2nd line
Displays the setting temperature value
[SV] and each selected input value
왖
key (UP key)
Increases set data
ALARM display
Turns on when the unit is alarming
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.
왔
key (DOWN key)
Decreases set data
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.
Alarm
Alarm code
Alarm description
Operation
status
Main reason
AL0
Memory error
Stop
There is an abnormality with the memory data in the controller due to a high level of noise.
AL1
Controller error
Stop
There is an abnormality with the data in the controller due to a high level of noise.
AL2
Temp. sensor disconnection alarm
Stop
The temperature sensor has been disconnected or short-circuited.
AL3
Temp. sensor short circuit alarm
Stop
There is a short-circuit in the temperature sensor.
AL4
Temp. sensor high temp. error alarm
Stop
The temperature sensor has exceeded the high temperature cutoff setting.
AL5
Temp. sensor low temp. error alarm
Stop
The temperature sensor has exceeded the low temperature cutoff setting.
AL6
Low fluid level alarm
Stop
The amount of circulating fluid in the tank has dropped.
AL7
Thermostat alarm
Stop
The thermostat has activated due to clogging of the heat sink of the filter or product, or failure
of the fan or pump.
9
HEF
Series
