10.20
LP SCR - Alarm failure troubleshooting
10.20.1
Tables of failures
Failures in LP-SCR
•
Table 10-63 - Hardwired ID failure to MCM #n
•
Table 10-64 - CAN interface failure
•
Table 10-65 - Urea dosing failure
•
Table 10-66 - Temperature sensor failure
•
Table 10-67 - SCR system failure
•
Table 10-68 - SCR sequence failure
•
Table 10-69 - SCR alarm failure
•
•
Table 10-71 - External system failure
•
Table 10-72 - Emergency bypass failure
•
Table 10-73 - Bypass switch activation failure
•
Table 10-74 - Outputs to SCR system failure
10.20.2
Failures in LP-SCR
Tab 10-63 Hardwired ID failure to MCM #n
Indication on LDU
Possible cause
Procedure
Hardwired ID failure MCM #1
Hardwire ID failure to MCM #1.
•
Re-establish the cabling
X21-5/6/7 to the MCM E70.
Tab 10-64 CAN interface failure
Indication on LDU
Possible cause
Procedure
CAN #1 and CAN #2 failure
LDU local
System bus failure to LDU local.
For CAN #1:
•
Re-establish the cabling X21-5/6
to LDU local E71.
•
Re-establish the cabling X24-3/4
to MCM E70.
For CAN #2:
•
Re-establish the cabling X22-5/6
to LDU local E71.
•
Re-establish the cabling X34-3/4
to MCM E70.
X72-B
AA00-0000-00AAD-410A-A
Operation Manual
LP SCR - Alarm failure troubleshooting
Winterthur Gas & Diesel Ltd.
- 462 -
Issue 003 2021-12
