Unit functions
Page 42
RESM-5
Fault area
Explanation
Possible causes
Load circuit interrupted after U
R
pickoff point
- Wire break, heatsealing band break
- Contact to heatsealing band is defective
PEX-W2 / W3 current transformer
signal interrupted
- I
R
measurement cable from current transformer interrupted
Primary circuit interrupted
- Wire break, triac in controller defective
- Primary winding of impulse transformer interrupted
- Relay Kb opened
Secondary circuit interrupted
before U
R
pickoff point
- Wire break
- Secondary winding of impulse transformer interrupted
No U
R
signal
- Measurement cable 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
- Contact to heatsealing band is defective
Total short-circuit
- Heatsealing band installed incorrectly, no insulation at
heatsealing bar ends or insulation incorrectly installed
- Heatsealing band completely bypassed by conducting part
U
R
signal incorrect
- U
2
outside of permissible range from 0.4…120VAC
I
R
signal incorrect
- I
2
outside of permissible range from 30…500A
Wire incorrectly laid through PEX-
W2 / W3 current transformer
- Check number of times wire is laid through (minimum of
twice required for currents < 30A)
Internal unit fault
- Hardware fault (replace unit)