Thetford N3000 series Operating instructions

Service mode LED
1. To enter service mode, push 3
buttons simultaneously until
binary code is visible
2. Then calculate or read in the
table which error you see.
!!! Note : When supply voltage
12 VDC (low current voltage) is
not available, no error code will
be given. When 12 VDC is
available the green power LED
will be on. If battery pack is
empty you can see a red light !!!
Troubleshooting
N3000 -series
13
12
11
Readout Code
- LED Display
8
2
Error Code
No Error
Code
1
10
9
3
4
5
6
7

Service mode LCD
Troubleshooting
The error code will appear in the
display over here.
!!! Note : When supply voltage
12 VDC (low current voltage) is
not available, no error code will
be given. When 12 VDC is
available the green power LED
will be on !!!
N3000 -series

Error code 1: Senses flame when gas should be off
Check if the gas valve works Replace the gas valve
No
No
Yes
Turn the refrigerator off and on,
problem solved? Problem solved
Yes
No
Disconnect the 12VDC supply
and connect it again. Is the
problem solved?
Yes
Install error code 1 modification
kit. For Tab connector item:
690449, for Mate-N-lok connector
item:690799
Production date of the fridge?
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
Troubleshooting
N3000 -series
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)

Error code 2: Burner control module returns
incorrect feedback.
Burner Control Module failure
Production date of the fridge?
Troubleshooting
N3000 -series
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)

Error code 3: Gas lockout because flame fails to
ignite within 30 sec.
Check if there is gas supply on
the fridge
Ensure gas
bottle is not
empty and all
gas valves are
open.
Check if there is a spark
Replace
electrode
Adjust the
electrode gap
to approx.
4mm
Check if the electrode gap is set
at about 4 mm above the burner
Check if electrode connections
& look for damages are ok
Turn refrigerator off and on and
check if there is a spark
No
Yes
Yes
Yes
No
NoNo
No
No
No
Yes
Yes
Yes
Check if electrode connections
are ok & look for damages
Troubleshooting
N3000 -series

Error code 3: Gas lockout because flame fails to
ignite within 30 sec.
Replace the
gas valve
Check if the
gas valve is
open
Check if injector of the burner
is clean and the flame is dense
and blue
Check if the gas pressure is
between 30 an 35 mb Check the gas
installation
Yes
Yes
No
Clean burner
and injector.
Replace the
burner in case
of bad
combustion
No
Yes
No
Yes
Repair connection or damage,
turn refrigerator off and on, still
error code 3?
Yes
Solved
No
No
No
Yes
Production date of the fridge?
Troubleshooting
N3000 -series
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)

Error code 4: DC heater is off when it should be on
Check if all the connections are
OK Restore the
connections
Change fuseCheck if the 20A fuse is OK
Check if the heater is using
current (+/-15 A large fridges
and +/-11 A small fridges)
Yes
Yes
Yes
Replace the
DC heater
No
No
No
No
No
No
No
!!! Note: put fridge off when
measuring the impedance off the
heater !!!
Check the resistance of the
heater, is this between min and
max?
Replace the
DC heater
Yes
Heater resistance:
Type MinΩMaxΩ
N3080 0.90 1.16
N3090 0.90 1.16
N3100 0.90 1.16
N3104 0.90 1.16
N3108 0.90 1.16
N3112 0.90 1.16
N3115 0.90 1.16
N3145 0.67 0.86
N3150 0.67 0.86
N3175 0.67 0.86
Production date of the fridge?
Troubleshooting
N3000 -series
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)

Error code 5: DC heater is ON when it should be
OFF.
Put the refrigerator off an on
(reset)
Is error code 5 gone?
No
Error solved
Yes
Production date of the fridge?
No
Troubleshooting
N3000 -series
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)

Error code 6: DC high voltage is out of range (lower
than 10 V or higher than 15 V)
Input high current voltage
supplied at the fridge is stable
between 10 V and 15V DC input issue non fridge related
If RV is equipped with a solar
panel, disconnect it. Is code 6
gone?
Issue with the solar panel
regulator or solar panel.
No
Yes
Yes
!!! If DC mode has been selected
manually, the refrigerator is not
switching automatically to
another source of energy when
the engine is off !!!
No
Production date of the fridge?
Troubleshooting
N3000 -series
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)

Error code 7: No “engine run” signal is present and
control is in Manual DC mode.
Input D+ voltage supplied at the
fridge is stable between 10 V and
15 V
D+ input issue
non fridge
related
No
!!! To know if D+ polarity is
good, select manually DC mode
and engine off. If no error code
occurs, that means that the D+
input is reversed. Ensure power
supply is capable to supply
correct amperage !!!
Yes
Production date of the fridge?
Troubleshooting
N3000 -series
Before 22-6-2015?
Serial number < E173S…. Use for LED:LED KIT:SR 691138
Use for LCD:LCD KIT:SR 691139
After 22-6-2015?
Serial number >/= E173S….. Replace power board assembly (691101)