Excel 800 LION
75 EN1B-0375GE51 R0308
Analog Output Modules Troubleshooting
case Problem Possible causes Remedy
Manual override settings
►
Check manual override settings
Outputs are in safety position
►
Check communication
Software problem
►
Power down and then power up
►
If problem persists, replace hardware
1
All outputs always have
zero voltage
Internal undervoltage detection has been
activated
►
Replace hardware
2
Unstable output voltage
Incorrect grounding of actuators
►
Ground actuators individually (see
Fig. 66 on page 47)
Table 78 Failure modes of analog output modules
Binary Input Modules Troubleshooting
case Problem Possible causes Remedy
1
Unexpectedly, all status
LEDs are always OFF
Internal overload protection has been
activated
►
Power down and then power up
Table 79 Failure modes of binary input modules
Relay Output Modules Troubleshooting
case Problem Possible causes Remedy
Improper manual override settings
►
Check manual override settings
Outputs are in safety position
►
Check communication
Software problem
►
Power down and then power up
►
If problem persists, replace hardware
1
Unexpectedly, all outputs
are in unpowered position
Internal undervoltage detection has been
activated
►
Replace hardware
Table 80 Failure modes of relay output modules
Floating Output Modules Troubleshooting
case Problem Possible causes Remedy
Improper manual override settings
►
Check manual override settings to
check outputs
Outputs are in safety position
►
Check communication
Software problem
►
Power down and then power up
►
If problem persists, replace hardware
1
Unexpectedly, all outputs
are in unpowered position
Internal undervoltage detection has been
activated
►
Replace hardware
Table 81 Failure modes of floating output modules
A “Frequently Asked Questions and Troubleshooting” document is available via the Honeywell Technical Assistance Center
(TAC) or, for Honeywell employees, on the Intranet under:
http://web.ge51.honeywell.de/tac
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