
Operating and service manual
184 of 222 pages
980
Tinternal LO
Warning
Description
Controller Internal Voltage Reference Fault
Cause
Indication of controller internal voltage reference fault
Trouble
shooting
Possible causes:
•
Defect power supply for controller PCB.
•
Defect controller PCB.
Accompanied alarms:
•
AL 801 will be activated during FT- or PTI test.
Trouble shooting:
1) Check if there are other active (sensor) alarms. Clear these alarms first
using their trouble shooting.
2) The controller PCB is defect. Replace the controller door.
Criteria
Internal temperature sensor below -40°C (-40°F)
Controller
action
None
Log
X
Alarm
Alarm light
Off
Consequence
Elimination
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive Low limit High limit
Actual value A/D channel
The measured temperature is internal on the controller PCB and cannot be measured
981
Tinternal HI
Warning
Description
Controller Internal Temperature Sensor High Temperature Fault
Cause
Indication of controller internal temperature sensor fault
Trouble
shooting
Possible causes:
•
Defect power supply for controller PCB.
•
Defect controller PCB.
Accompanied alarms:
•
AL 801 will be activated during FT- or PTI test.
Trouble shooting:
1) Check if there are other active (sensor) alarms. Clear these alarms first
using their trouble shooting.
2) Check voltage level of 24 V DC and 5 V signals to see if power supply has
an open circuit or other damages. If voltages are OK, the controller PCB is
defect. Replace controller door.
Criteria
Internal temperature sensor above +70°C (158°F)
Controller
action
None
Log
X
Alarm
Alarm light Off
Consequence
Elimination
Log data
Parm 1
Parm 2
Parm 3
Parm 4
Parm 5
Active/Inactive Low limit High limit
Actual value A/D channel
The measured temperature is internal on the controller PCB and cannot be measured