Troubleshooting Guide; Dcm Troubleshooting - Dometic Seastar DCM User's Manual And Troubleshooting Manual

Troubleshooting Guide

4 Troubleshooting Guide

4 .1 DCM Troubleshooting

Solid GREEN = Channel On
1 x GREEN = Battery Too Low
2 x GREEN = Battery Too High
No GREEN = Power Off/Sleep
Symptoms
Power LED off
Power LED green flash
1x pulse
Power LED green flash
2x pulses
Status LED red flash
2x pulses (missing
NMEA network)
Status LED red flash
3x pulses (missing MFD)
Device load does not
turn on when pressed
at MFD
A device load does
not turn on even
though associated load
status indicator shows
blue(ON)
A device load turning
outputs ON without
being commanded
Signal input erratic for
Meter or Switch Input
A switch connected to
DCM that previously
worked does not operate
EN
2 x RED = No NMEA Network
3 x RED = Missing Peer Comm.
4 x RED = Configuration Fault
Solid RED = Device Fault
Potential Causes
a) House battery switch off
b) Module off
c) Module failure
a) Dead battery
b) Charging source
disconnected
a) Overvoltage
a) MFD power off
b) NMEA network missing
terminating resistors
c) Faulty NMEA network
a) Missing compatible
MFD
b) Improper DCM setup
a) Load's associated fuse
is blown
b) Load wiring or load
itself has a problem
a) Load's associated fuse
is blown
b) Load wiring or load
itself has a problem
a) Load fuse at the bypass
position
a) Missing ground signal
b) Incorrect/multiple
ground signals
a) Switch is faulty
b) Switch wiring is faulty
LED Flash Codes
DCM
Checking Steps and Solutions
a) Check house battery switch to be ON position. Measure voltage across module
power + and - to be above 9 VDC. Ensure all battery positive and negative wires
secured.
b) Reset house battery switch to off and on to wake up unit.
c) Call OEM or SeaStar service for assistance.
a) Measure voltage across module power + and - to be above 9 VDC. Ensure all
battery positive and negative wires are secured.
b) Check voltage when charging engine is running. Ensure VSS or VSR
is active.
a) Measure voltage across module power + and - to be between 9 and 16 VDC.
Trace battery positive and negative wire to a single battery.
a) Ensure MFD can be turned on. Check power supply and fuse to MFD.
b) Verify NMEA backbone has 2 terminating resistors.
c) Refer to section 3.2 "NMEA 2000 Network Troubleshooting".
a) Check home page of MFD to ensure Switching Icon exist. Update MFD software to
the latest from MFD manufacturer. Check Home/Setting/Communication/Device
List for SeaStar DCM.
Remove cover on module. Use output channel label to locate fuse for the load:
a) Check the fuse.
b) Move the fuse to the manual bypass position to check if the load will
turn on.
Remove cover on module. Use output channel label to locate fuse for the load:
a) Check the fuse.
b) Move the fuse to the manual bypass position to check if the load will
turn on.
Remove cover on module. Use output channel label to locate fuse for the load:
a) Move the fuse back to the normal position.
a) Verify DCM has a ground signal at main ground lug.
b) Verify DCM shares the same source ground as the signal being measured.
a) Meter/test switch continuity. Replace switch with known working switch.
b) Verify secure and proper connections to DCM. Meter/test switch continuity.
No BLUE = Channel Off
Solid BLUE = Channel On
Slow BLUE = Open Circuit
Fast BLUE = Overload Protection
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