Controller functions
Page 58
RES-408
Version 1
11.22 Fault areas and causes
The table below explains the possible fault causes.
Fault area
Explanation
Possible causes
Load circuit interrupted after U
R
pickoff point
- Wire break, heatsealing band break
- Contacting to heatsealing band 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 wire interrupted
Partial short-circuit (delta R)
- Heatsealing band partially bypassed by conducting part
(clamp, opposite heatsealing bar etc.)
Parallel circuit interrupted
- Wire break, heatsealing band break
- Contacting to heatsealing band defective
Total short-circuit
- Heatsealing band installed incorrectly, insulation at heat-
sealing bar ends
missing or incorrectly installed
- Conducting part bypasses heatsealing band completely
U
R
signal incorrect
- Up to May 2006: DIP switches 1 - 3 configured incorrectly
(U
2
range)
- As of June 2006: U
2
outside permissible range from
0.4…120VAC
Temperaturregler
HARDWARE
5
3
6
8
9
8
7
1
4
1
2
2
9
7
8
UR
IR
U2
I2
3
2
1
4
5