Refrigerator Will Not Operate Or Cool On D/C - Norcold 442 Repair Manual

B101
16. If you read an open, the refrig-
erator will not cool and the
heater element must be re-
placed.
17. If you have a reading, but it is
less or greater than the specifi-
cation, it indicates the element
is not the correct size and
must be replaced.
18. A shorted heater element will
cause the 5 Amp fuse to blow.
The Refrigerator will not
Operate or Cool on DC
Electric
Note:
DC operation will not initially cool
down the refrigerator. The initial
cooling must be done in either the
GAS or AC modes. Attempting to
cool down the refrigerator in the
DC mode will result in poor cooling
or battery run down.
1. Check for 12VDC between
positive and negative leads at
the rear of the refrigerator as
shown in Figure 3.41.
2. The voltage must be from
10.5 to 15.4 volts with the re-
frigerator on.
3. Check the continuity of F3
fuse. Figure 3.42 indicates a
blown fuse (meter pointer re-
mained at left side of scale. If
the fuse was good, the meter
pointer would have been to the
right side of the scale).
4. Replace the fuse if necessary.
15 Amp Fuse required on sin-
gle door models and 20 Amps
on double door models.
WARNING
NEVER OVERFUSE A CIRCUIT. RE-
PLACE BLOWN FUSE WITH EXACT
REPLACEMENT INDICATED
NORCOLD. OVERFUSING A CIR-
CUIT CAN RESULT IN A FIRE.
Note: Before gaining access to
the combination control, check the
DC Heater element as described in
Steps 16-19 on page 3-20.
Figure 3.41 12 Volt Check at DC Supply Connections
Figure 3.42 Checking F3 Fuse for Continuity
BY
Figure 3.43 Access to Controls
3-18