Honeywell Excel 800 SYSTEM Installation And Commissioning Instructions page 76

Troubleshooting
C-Bus Tx and Rx LEDs
case C-Bus LEDs
1 Both LEDs are flashing
2 Both LEDs are OFF
3 Both LEDs are flashing
synchronously
Table 74 XCL8010 C-Bus Tx and Rx LEDs
HMI Tx and Rx LEDs
case HMI LEDs
1 Both LEDs are flashing
2 Both LEDs are OFF
Table 75 XCL8010 HMI Tx and Rx LEDs
Modem Tx and Rx LEDs
case Modem LEDs
1 Both LEDs are flashing
2 Both LEDs are OFF
Table 76 XCL8010 modem Tx and Rx LEDs
EN1B-0375GE51 R0910
Meaning
If the C-bus is functioning properly, then the
XCL8010 Controller is functioning properly.
If the C-bus is not functioning properly, then
the termination can be wrong.
No C-bus communication.
No C-bus communication.
Meaning
If the HMI Interface is functioning properly,
then the XCL8010 Controller is functioning
properly.
No HMI Interface communication.
Meaning
If the Modem Interface is functioning properly,
then the XCL8010 Controller is functioning
properly.
No Modem Interface communication.
Remedy
No action necessary
Check C-bus termination switch S1
►
(location: see Fig. 48 on page 33)
Check C-bus settings
►
Check C-bus wiring
►
Remedy
No action necessary
Check HMI Interface connection and
►
proper earthing of connected
hardware
Remedy
No action necessary
Check Modem Interface connection
►
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Excel 800