Norcold N306 - Troubleshooting Test A: No AC Cooling

N305, N306, N305.3, N306.3
30
www.norcold.com
1. Perform the “Diagnostic Pre-Checks.”
2. Remove unit from enclosure, leaving AC power connected. Have any wires become disconnected from their terminals?
■ Yes: Reattach wires and test unit; refer to the wiring diagram.
■ No: Go to the fl ow chart below.
Troubleshooting Test A - Not Cooling On AC
Troubleshooting, cont’d. Dépannage, suite Resolución de problemas (cont.)
Is mode selector switch in
the AC position?
Turn mode selector
switch to AC and start up
No
Is there 240 VAC at terminal block
Brown wire = 240 volt line
Blue Wire = 240 volt neutral
Correct AC power
to refrigerator
No
Properly connect and or
repair wiring
Replace power
indicator light
Is AC thermostat set to
mid-range or higher?
Yes
Set AC thermostat to
mid-range or higher
No
Is AC power indicator
light on?
Yes
Is 240 VAC at input to AC
thermostat?
(Terminal 4, Black wire)
Is 240 VAC at output of
AC thermostat?
(Terminal 3, Blue/White wire)
Yes
No
Correct wiring/
connection between
mode selector switch
terminal 1b and AC
thermostat terminal 4
(Black Wire)
Replace AC
thermostat
No
Is 240 VAC at input of AC
heater?
(Black Wires)
Yes
No
Replace AC heaterYes
Yes
Is there 240 VAC at input
to 3A AC Heater Fuse?
(Black lead)
Ensure black
wire of 3A Fuse
is connected to
terminal block
with brown wire
from AC cord
Yes
No
Is there 240 VAC at output
of 3A AC Heater Fuse?
(Black lead)
Yes
Replace fuse
No
No
Is there 240 VAC at
input to mode selector
switch, Terminal 1a?
(Black wire)
Correct wiring/
connection
between fuse and
selector switch
(Black Wire)
No
Is there 240 VAC at
output of mode selector
switch, Terminal 1b?
(Black wire)
Yes
Replace mode
selector switch
No
Is power indicator light
on?
Yes
Are indicator wires
properly connected per
wiring diagram?
No
No
Yes
Yes
Yes
Models
N304M.3,N404M.3,N504M.3
Refrigerator will not operate in
AC mode
Is mode selector switch in
the AC position?
Turn mode selector
switch to AC and start up
No
Is there 120 VAC at terminal block
Black wire = 120 volt line
Black Wire (ribbed)= 120 volt neutral
Correct AC power
to refrigerator
No
Properly connect and or
repair wiring
Replace power
indicator light
Is AC thermostat set to
mid-range or higher?
Yes
Set AC thermostat to
mid-range or higher
No
Is AC power indicator
light on?
Yes
Is 120 VAC at input to AC
thermostat?
(Terminal 4, Black wire)
Is 120 VAC at output of
AC thermostat?
(Terminal 3, Blue/White wire)
Yes
No
Correct wiring/
connection between
mode selector switch
terminal 1b and AC
thermostat terminal 4
(Black Wire)
Replace AC
thermostat
No
Is 120 VAC at input of AC
heater?
(Black Wires)
Yes
No
Replace AC heaterYes
Yes
Is there 120 VAC at input
to 3A AC Heater Fuse?
(Black wire)
Ensure black
wire of 3A Fuse
is connected to
terminal block
with black wire
from AC cord
Yes
No
Is there 120 VAC at output
of 3A AC Heater Fuse?
(Black wire)
Yes
Replace fuse
No
No
Is there 120 VAC at
input to mode selector
switch, Terminal 1a?
(Black wire)
Correct wiring/
connection
between fuse and
selector switch
(Black Wire)
No
Is there 120 VAC at
output of mode selector
switch, Terminal 1b?
(Black wire)
Yes
Replace mode
selector switch
No
Is power indicator light
on?
Yes
Are indicator wires
properly connected per
wiring diagram?
No
No
Yes
Yes
Yes
Models
N305, N305.3, N306, and N306.3
Refrigerator will not operate in
AC mode
NOR000230A-1