Instruction Manual
Microprocessor Temperature Regulator HT MC11
Page 21 of 22
10 Error and Status Messages
Display Cause Possible solution
S P . L o
Lower setpoint limit has
been reached
Reduce limit (parameter S P . L o )
S P . H i
Upper setpoint limit has
been reached
Increase limit (parameter S P . H i )
LO C
Parameter is locked Unlock parameter, if necessary
Parameter: LOC on device configuration level
E r . Hi
Top range end has been
exceeded, sensor defect
Check sensor and cable
E r . L o
Bottom range end has been
exceeded, sensor defect
Check sensor and cable
Check process value offset
E r . OP
Self tuning error Quit error message by pressing key „ E“ .
Check self tuning conditions and restart.
E r . S y
E r r . 0
System error Quit error message by pressing key „ E“ .
Check all parameters.
If error message continues, please send the
controller back to the manufacturer
E r r . 9
Internal Error Communication error
Send the controller back to the manufacturer.
E r . C n
Reference junction
temperature error
The sensor for the reference junction measurement
is located on the connection board. Check the cable.
AL . L i
Temperature AL2 has been
exceeded (over-temperature)
AL . C u
Heating leakage current >
0.3 A
A current is detected while the heating should be
switched off.
OF F
When starting the program
controller: no ramp or dwell
time is set.
Check program parameters. Set times for I . r A
and/or I. t i for the desired steps.
S t r t
Program controller started Only info message
ho L d
Program controller set to
hold
Only info message
rE S u
Program controller resumed Only info message
S t o P
Program controller stopped Only info message
Version 1080/1.03 02/2018
471 11 400
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