Dometic DM2652 Service Manual page 26

Diagnostic Procedures
Fault Description
E0 is displayed.
Three thermostat range setting
lights are flashing. (First generation
DMR702 and DMR702-D models
only)
E1 is displayed.
The left thermostat range setting
light is flashing. (First generation
DMR702 and DMR702-D models
only)
E2 is displayed.
The middle thermostat range
setting light is flashing. (First
generation DMR702 and
DMR702-D models only)
26
Possible Cause
The DC voltage is too low.
The lower control module cannot
handle the AC ripple level.
The communication wire harness
has lost continuity or is shorted to
ground.
There is a loose or weak ground.
There is RF interference.
There is a short or a failed circuit in
the lower control module.
The upper control module is
defective.
The gas pressure is too low or
absent.
The knob on the gas valve has
been turned to the off or closed
position.
The resistance on the gas valve
solenoid is out of specification.
The communication wire harness
has lost continuity or is shorted to
ground.
There is a loose or weak ground.
There is RF interference.
There is a short or a failed circuit in
the lower control module.
The upper control module is
defective.
The thermistor has a bad
connection.
There is a short in the thermistor
wire.
The thermistor is not operating
within the proper temperature
range.
There is a short or a failed circuit in
the lower control module.
Americana and New Generation Refrigerators
Recommended Action
Perform a diagnostic on the power supply.
Perform a diagnostic on the communication wire
harness.
Clean or tighten the ground connections for
the lower control module, gas valve and RV
converter as needed. Strip back the wiring and
make new connections as needed.
Perform a diagnostic for RF interference.
If the error persists, replace the lower control
module.
If replacing the lower control module does not
resolve the error, replace the upper control
module.
Perform a diagnostic on the gas supply.
Perform a diagnostic on the gas valve.
Perform a diagnostic on the communications
wire harness.
Clean or tighten the ground connections for
the lower control module, gas valve, and RV
converter as needed. Strip back the wiring and
make new connections as needed.
Perform a diagnostic for RF interference.
If the error persists, replace the lower control
module.
If replacing the lower control module does not
resolve the error, replace the upper control
module.
1. Perform a diagnostic on the thermistor.
2. If the error persists, replace the lower
control module.
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