Norcold EV0041 Service Manual page 10

Procedure C: Temperature Control ON, Power Indicator Off, Compresssor Does Not Run
Check ccnnections, in-line
fuse and DC Power Supply
fuse.
NO
YES
Measure DC Power Supply
output to compressor. See
1---<
Figure #and text below.
NO
Measuring Power Supply Output, Compressor Disconnected
A
cAUTION!
Do not use a converter or battery charger to supply
DC power to the refrigerator. These devices do not
supply filtered DC power. When Using a converter
or battery charger, make sure that a battery is
connected in-line between them.
1. Connect the DC power supply to a charged 12 volt
automotive battery. Observe the correct polarity (red+/
black-) when connecting the DC Power Supply wires to
the battery.
2. Disconnect the line voltage wire from the compressor.
3. Tum on the refrigerator. The power light should illuminate.
4. Measure voltage output at line voltage connector. See
Figure 14. Voltage values with the compressor
disconnected :
DEIEV0041
DEIEV0061
17 to 25 Vac.
17 to 25 Vac.
The DC power supply must be replaced if the voltage output
is not within the specified values.
5. Shift operation to AC power. Plugging the ACcord to a
"live" 120 Vac outlet will automatically shift refrigerator to
AC operation .
6. Measure voltage at compressor. See Figure 14, See step
4 for voltage output values.
No voltage! or voltage is lower or higher than values listed in
Step 4,see Procedure D, page 11.
Check polarity, repair
ccnnections or replace
fuses as required .
Check polarity, repair
ccnnections or replace
fuses as required.
Correct Vac output.
proceed to Procedure#.
Power Switchl
/Thermostat
Power Indicator
/ (Green LED)
D C Power Input
'f~res
Red: Positive ( +)
Black: Negative(-)
Figure 14. Checking DC Power Supply voltage output.
10
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