Troubleshooting
![](/sitemaps/103/small/103.jpg)
Back
Assembly PKL 63
Error category
Display
Problem
Display remains dark
Display
Problem
Display remains dark
Possible cause
DC voltage 24 VDC missing or faulty
Solution
Check correct connection of the pyrometer to the plant
![Check correct connection of the pyrometer to the plant](/api/keller/getMedia?bu=its&id=ID9000012)
DC voltage 24 VDC missing or faulty
Solution
Check correct connection of the pyrometer to the plant
Possible cause
Supply voltage on the device unstable
Solution
Check power supply
![Check power supply](/api/keller/getMedia?bu=its&id=ID9000013)
![Check power supply](/api/keller/getMedia?bu=its&id=ID9000001)
Supply voltage on the device unstable
Solution
Check power supply
Possible cause
Incorrect polarity of the supply voltage
Solution
Measure current : PK -> 25 mA (45 mA with pilot light)
![Measure current : PK -> 25 mA (45 mA with pilot light)](/api/keller/getMedia?bu=its&id=ID9000001)
Incorrect polarity of the supply voltage
Solution
Measure current : PK -> 25 mA (45 mA with pilot light)
Possible cause
Flange plug damaged
Solution
Visual inspection for completeness of the connection pins in the connector
![Visual inspection for completeness of the connection pins in the connector](/api/keller/getMedia?bu=its&id=ID9000026)
Flange plug damaged
Solution
Visual inspection for completeness of the connection pins in the connector
Possible cause
Device internal temperature above the permissible ambient temperature
Solution
Use protective fitting / cooling fitting / shield radiant heat
![Use protective fitting / cooling fitting / shield radiant heat](/api/keller/getMedia?bu=its&id=ID9000018)
Device internal temperature above the permissible ambient temperature
Solution
Use protective fitting / cooling fitting / shield radiant heat