Diagnosing Cooling Problems; Wiring Pictorial; Wiring Diagram - Norcold N300 Service Manual

WARNING:
When cleaning, do not try to remove
the orifice [3] from the orifice adapter [4]. Removal
will damage the orifice and can cause a propane gas
leak. Leaking propane gas can ignite or explode and
result in dangerous personal injury or death. Do not
clean the orifice with a pin or other objects.
- Clean the orifice assembly with air pressure and alcohol
only.
- Using a wrench, assemble the orifice assembly to the
burner.
- Assemble the flare nut to the orifice assembly.
- Examine all of the gas connections for leaks.

Diagnosing Cooling Problems

WARNING:
The refrigerator cooling system is under
pressure. Do not try to repair or to recharge a defec-
tive cooling system. The cooling system contains
sodium chromate. The breathing of certain chromium
compounds can cause cancer. The cooling system
contents can cause severe skin and eye burns, and
can ignite and burn with an intense flame. Do not
bend, drop, weld, move, drill, puncture, or hit the
cooling system.
Make sure the cooling unit has the correct ventilation:
- Make sure that the intake and exhaust vents are not
blocked.
- Make sure that the air flow through the back of the
refrigerator is not decreased or blocked.
- Make sure the ventilation baffle is correctly installed.
Examine the cooling unit for leaks.
WARNING:
If you think that the cooling system has a
leak, do not operate the refrigerator. Replace the
cooling unit before operating the refrigerator.
- If you smell ammonia, the cooling unit has a leak and
must be replaced.
- If you see a yellow powder or residue anywhere at the
rear of the refrigerator or in the enclosure, the cooling unit
has a leak and must be replaced.
Determine if the cooling problem occurs while operating the
refrigerator on propane gas, AC electric, and DC electric:
- Determine if the selected energy source is operating and
heating correctly:
CAUTION:
insulation sleeve. During normal operation,
some tubes of the cooling unit are hot. Do not
touch any tubes of the cooling unit.
- Within 20 minutes of starting the refrigerator, touch
the outside of the insulation sleeve.
Touch only the outside of the
- The outside of the insulation sleeve should be warm
to the touch.
- If the outside of the insulation sleeve is not warm, the
selected energy source may not be operating
correctly.
- Start up the refrigerator on a different energy source
and repeat the procedure for all energy sources.
- If the outside of the insulation sleeve is warm to the
touch, make sure the unit is cooling correctly.
- Within one hour after starting up the refrigerator,
touch the fins on the inside of the fresh food com-
partment.
- The fins should feel cold to the touch.
- If the fins do not feel cold to the touch after two
hours, the cooling unit is not operating correctly.
- If the cooling problem does not occur when operating on
all energy sources, the problem is not the cooling unit.
- Use the "Troubleshooting Charts" to determine the
cause of the problem.

Wiring Pictorial

The parts of the wiring pictorial are (See Art01020):
1. .......................................................... 120 VAC Power cord
2 ..................................................................... Terminal block
3 .......................................................................... 3 Amp fuse
4 .................................................................... Selector switch
5 ...................................................................... Thermocouple
6 ............................................. Thermostat / gas safety valve
7 .................................................... Thermocouple interrupter
8 ........................................................................ Flame meter
9 ............................................................................ AC heater
10 ............................ -12 VDC Power supply (3-way models)
11 ........................... +12 VDC Power supply (3-way models)
12 ............................................ 20 Amp fuse (3-way models)
16 ................................................ DC heater (3-way models)

Wiring Diagram

The parts of the wiring diagram are (See Art01021):
1. ............................................................................. 120 VAC
2 .......................................................................... 3 Amp fuse
3 .......................................................................... Thermostat
4 ............................................................................ AC heater
5 .............................................................................. 120 VAC
6 .................................................................. Gas safety valve
7 .................................................... Thermocouple interrupter
8 ........................................................................ Flame meter
9 ......................................................................... Piezo lighter
10 .......................................................................... Spark gap
11 .................................................................... Thermocouple
12 .................................................. +12 VDC (3-way models)
13 ............................................ 20 Amp fuse (3-way models)
14 ................................................ DC heater (3-way models)
15 ........................................... -12 VDC Com(3-way models)
17 .................................................................. Selector switch
Service Manual N300 Models - 7