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5 Troubleshooting
Error code
Alarming uC Set condition
16yy
A
17yy
A
18yy
A
19yy
A
20yy to
A
23yy
30yy
A
33yy
A
5-30
SIO data not received
SIO cannot send
AD converter defective Defective uC controller A
Improper
communication
between uC A and
DCU board
Safety relevant data
non plausible
5 V bus A out of range
Panel supply voltage
out of range
Possible failure
ESD or EMI problems
Improper connection of
external SIO cable (Control
panel cable) Or Connection
problem with external SIO
cable connector (Lemosa
plug)
Defective uC controller A
Defective uC controller A
Cable problem between PC
board A and DCU board
Defective uC controller A
Defective PC board A
Defective DCU board
Defective uC controller A
Fuse SI 3 defective
Defective PC board A
Defective uC controller A
Fuse SI 1 defective
Defective PC board A
Defective safety diode on PC
board B
TRM, Centiva/5 Plus, M1047448/CM-922026, rev. 3.50.a of 11/05
Action
Check environment for ESD or
EMI source
Check front panel cable and
plug (Lemosa) and replace, if
necessary
Replace PC board A
Replace PC board A
Replace PC board A
Check cable and plug
Replace PC board A
Replace PC board A
Replace DCU board
Replace PC board A
Check fuse SI 3 and replace, if
necessary
Replace PC board A
Replace PC board A
Check fuse SI 1 and replace, if
necessary
Replace PC board A
Replace PC board B
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