Norcold N61X User Manual
www.norcold.com/cda
33
N6XX/N8XX Models
Refrigerator Service Manual
2-Way Models
18 AWG is the minimum AWG size wire that can be
used for connecting DC power to 2-way models. The
size fuse for overload protection must not exceed 6
amps.
18 AWG is the minimum AWG size wire that can be
used for connecting DC power to 2-way models. The
size fuse for overload protection must not exceed 6
amps.
3-Way Models
The distance between the RV DC power source and
the power board DC power connection terminals
dictates the AWG size wire that must be used. If the
distance from the DC power source is:
The distance between the RV DC power source and
the power board DC power connection terminals
dictates the AWG size wire that must be used. If the
distance from the DC power source is:
n
20 feet or less – 10 AWG or a larger gauge wire
must be used. The size fuse for circuit overload
protection must not exceed 30 amps.
must be used. The size fuse for circuit overload
protection must not exceed 30 amps.
n
Over 20 feet – AWG 8 or a larger wire gauge must
be used. The size fuse for circuit overload
protection must not exceed 40 amps.
be used. The size fuse for circuit overload
protection must not exceed 40 amps.
AC/DC Converter as Power Source
The power board must be supplied 12 Vdc only from
the filtered output (battery side) of a converter.
the filtered output (battery side) of a converter.
Unfiltered voltage (commonly referred to as AC ripple)
output of AC/DC converters can cause the electronic
controls to set false fault codes. It can also turn off the
refrigerator or prevent the refrigerator from turning off.
output of AC/DC converters can cause the electronic
controls to set false fault codes. It can also turn off the
refrigerator or prevent the refrigerator from turning off.
ELECTRICAL REQUIREMENTS AND COMPONENTS
DC Voltage Requirements and Polarity
Operating controls require 10.5 to 15.4 Vdc to operate.
The positive wire lead (+) connects to power board
terminal 12VDC; the negative wire lead (–) connects to
terminal GND1.
The positive wire lead (+) connects to power board
terminal 12VDC; the negative wire lead (–) connects to
terminal GND1.
Power Board DC Fuse
The controls circuit fuse is a standard 5 amp (tan
color) automotive blade type fuse. It is located on the
power board, terminal F1.
color) automotive blade type fuse. It is located on the
power board, terminal F1.
DC Heater–3-Way Refrigerators Only
The DC heater, shown in Figure 19, is a cartridge type
heater. The DC heater is rated for 225 Watts/16 amps,
at a nominal 14 Vdc. Heater resistance should be
0.82 - 0.91 ohms.
heater. The DC heater is rated for 225 Watts/16 amps,
at a nominal 14 Vdc. Heater resistance should be
0.82 - 0.91 ohms.
When AUTO DC or DC-Manual Mode does not
maintain refrigeration and ventilation is correct:
maintain refrigeration and ventilation is correct:
n
Measure DC voltage input to the power board.
n
Measure the heater's amp draw.
n
If amp draw is not as specified, measure the
heater's resistance at ambient temperature.
heater's resistance at ambient temperature.
The DC heater must be inserted into the heater tube
until the stop bead makes full contact with the tube's
rim. See Figure 20, page 34.
until the stop bead makes full contact with the tube's
rim. See Figure 20, page 34.
DC Heater Circuit Fuse
!
WARNING:
Do not wire the heater(s) direct! Wiring heater(s)
direct bypasses control safety devices and creates
the potential for an electrical fire.
direct bypasses control safety devices and creates
the potential for an electrical fire.
The DC heater circuit fuse is a standard 30 amp
(green) automotive blade type fuse. It is located on the
power board, terminal F2.
(green) automotive blade type fuse. It is located on the
power board, terminal F2.
The AUTO DC and DC-Manual Mode operation
maintain refrigeration only.
maintain refrigeration only.
NOTE
DC Power Wiring Requirements
!
WARNING:
Never replace a fuse with a higher amp rated fuse.
Always use the specified fuse.
Always use the specified fuse.
!
WARNING:
Never replace a fuse with a higher amp rated fuse.
Always use the specified fuse.
Always use the specified fuse.
!
WARNING:
Never use undersized wires to supply DC power to
the power board. The use of undersized wires can
cause low voltage and high amp draw conditions. The
high amp draw caused by a circuit using undersized
wires will cause the wire to overheat and creates an
electrical fire hazard.
the power board. The use of undersized wires can
cause low voltage and high amp draw conditions. The
high amp draw caused by a circuit using undersized
wires will cause the wire to overheat and creates an
electrical fire hazard.
Figure 19. DC Heater
Yellow Wire Leads
Stop Bead