Controller functions
UPT-606
Page 45
9.14
Fault areas and causes
The table below explains the possible fault causes.
Temperature
controller
HARDWARE
5
3
6
8
9
8
7
1
4
1
2
2
9
UR
IR
U2
I2
3
2
1
45
7
8
Fault area
Explanation
Possible causes
Load circuit interrupted after U
R
pickoff point
- Wire break, heating element break
- Contact to heating element is defective
PEX-W2/-W3 current transformer
signal interrupted
- I
R
measuring wires from current transformer interrupted
Primary circuit interrupted
- Wire break, triac in controller defective
- Primary winding of impulse transformer interrupted
Secondary circuit interrupted
before U
R
-pickoff point
- Wire break
- Secondary winding of impulse transformer interrupted
U
R
signal missing
- Measuring wires interrupted
Partial short-circuit (delta R)
- heating element partially bypassed by conducting part
(clamp, opposite heating bar etc.)
Parallel circuit interrupted
- Wire break, heating element break
- Contacting to heating element defective
Total short-circuit
- heating element installed incorrectly, insulation at heating
bar ends missing or incorrectly installed
- Conducting part bypasses heating element completely
U
R
signal incorrect
- Up to software revision 015: DIP switches 1 - 3 configured
incorrectly (U
2
range)
- As of software revision 100: U
2
outside permissible range
from 0.4…120VAC