Dometic Seastar DCM User's Manual And Troubleshooting Manual page 15

Troubleshooting Guide
Symptoms
Load breaker tripped
or blown fuse
Wireless key fob doesn't
work
Audible noise from speaker
system when load device is
active
EN
Power Management/ Battery Switches & Key Fob
Potential Causes
a) Improper voltage
caused load current
to rise causing breaker
to trip or fuse
to blow
b) Harness has short
circuit
c) Load/device has short
circuit
d) If tripped repeatedly
weak/faulty breaker
a) Battery inside key fob
requires replacement
b) Key fob needs to be
paired with DCM
c) Faulty Key fob or
receiver
a) The load device is
grounded in between
the Stereo head unit and
stereo amplifier
b) The load device is
grounded in between
the battery and the
stereo amplifier
c) A DCM load is creating
PWM (Pulse With
Modulation) noise that
is bleeding into speaker
wires
Checking Steps and Solutions
a) Measure system voltage and restore by charging battery
if required.
b) Disconnect load and turn on breaker or replace fuse to see if the breaker trips
or fuse blows, if it does, there is a short circuit within the breaker's associated
wiring harness.
c) Disconnect the load from DCM, the breaker or the fuse. Measure resistance on
the load to check for short circuit.
Test/ replace with a working load device.
d) Check breaker's load value with a DC current meter (Amp Clamp), If the load is
pulling less than the breaker's capable current rating, replace the breaker.
a) Replace battery.
b) See section See 2.7 "Key Fob Pairing Procedure."
c) Test/replace with a working receiver.
a) Install a new (separate) 14 AWG ground wire directly from stereo head unit
ground to stereo amplifier ground.
b) Ensure stereo amplifier ground is terminated as close to the battery as possible
with no load grounds in between. Or, apply solution (a).
c) Re-route speaker wires away from DCM load wires.
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