Norcold DE-0041 User manual

Part No. 635384 Rev. F (06.03.2019)© 2019 NORCOLD, INC.All rights reserved.
Service Manual
Compressor Refrigerators
DE/EV0061 Series
DE/EV0041 Series
MODELS
DC0061
Improper installation, adjust-
ment, alteration, service or
maintenance can cause per-
sonal injury or property dam-
age. Refer to this manual.
For assistance or additional
information, contact a quali-
fied installer, service agency,
or the gas supplier.
NOTICE
AVIS
AVISO
CAUTION
!
ATTENTION
!
ATTENTION
ATTENTION
!
ATENCIÓN
ATTENTION
!
DANGER
Questions? 1-800-543-1219

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 2
CONTENTS
SAFETY .......................................................................................3
INTRODUCTION..........................................................................4
About This Manual..........................................................................................4
Certification and Code Requirements.............................................................4
About Installation.............................................................................................4
Replacement Parts..........................................................................................4
TechnicalAssistance.......................................................................................4
Refrigerator Model Number.............................................................................4
SPECIFICATIONS........................................................................5
Exploded Views - DE/EV0041.........................................................................6
Exploded Views - DE/EV0061 and DC0061...................................................7
GENERAL INFORMATION..........................................................8
Installation.......................................................................................................8
Ventilation .......................................................................................................8
Overview.....................................................................................................8
Electrical Connections.....................................................................................8
120 / 220 VoltsAC Electrical Connection ...................................................8
12 / 24 Volts DC Electrical Connection.......................................................8
Polarity........................................................................................................8
DIAGNOSTICS.............................................................................9
Diagnostic Pre-Checks....................................................................................9
Self-Test Diagnostics.....................................................................................10
Connecting the LED..................................................................................10
Reading the LED......................................................................................11
Self-Test Diagnostic Chart........................................................................11
Diagnostic Symptom Chart...........................................................................11
TROUBLESHOOTING...............................................................12
Troubleshoot Compressor Control Module...................................................12
TestA: Battery Protection Cut-Out............................................................12
Test B: Fan Over Current Cut-Out............................................................14
Test C: Motor Start Error...........................................................................15
Test D: Minimum Motor Speed Error........................................................16
Test E: Thermal Cut-Out of Electronic Unit ..............................................17
Troubleshoot Symptoms...............................................................................18
Test F: Not Cooling - Not Turning On........................................................18
Test G: Refrigerator Gets Too Cold...........................................................20
Test H: Refrigerator Builds Frost Inside ...................................................21
Test I: Runs But Does Not Cool Properly..................................................22
Test J: Will Not Run On DC Power...........................................................23
Test K: Voltage Within Cutout Range but Refrigerator Cuts Out ..............24
Test L: Refrigerator Defrosts.....................................................................25
Test M: Inefficient Cooling When Power Greater than 27 Volts................26
Test N: Hot Fuse Holder...........................................................................27
Test O: Short Cycling................................................................................28
WIRING DIAGRAMS..................................................................29
DE / EV0041 and DE / EV0061 Models........................................................29
DC0061 Models............................................................................................30
REFRIGERATOR ENCLOSURE .............................................31
Remove Refrigerator ....................................................................................31
Replace Refrigerator ....................................................................................31
FIGURES
Fig. 1 - Refrigerator information label location ...............................................4
Fig. 2 - DE/EV0041 Models.............................................................................6
Fig. 3 - DE/EV0061 and DC0061 Models.......................................................7
Fig. 4 - Thermostat Terminals........................................................................10
Fig. 5 - Relay Terminals................................................................................10
Fig. 6 - LED and connectors ........................................................................10
Fig. 7.1 -Attach Blade Connectors...............................................................10
Fig. 7.2 - Disconnect 12 VDC........................................................................10
Fig. 7.3 - Connect BladeAdapter..................................................................10
Fig. 7.4 - Connect LED..................................................................................11
Fig. 7.5 - Connect LED..................................................................................11
Fig. 8 - Wiring Diagram - DE / EV0041, DE / EV0061..................................29
Fig. 9 - Wiring Diagram - DC0061.................................................................30
■La version française commence à la page 33.
■La versión en español comienza en la página 66.

3 SERVICE MANUALwww.norcold.com
SAFETY
It is not possible to anticipate all of the conceivable ways or condi-
tions under which the refrigerator may be serviced or to provide
cautions as to all of the possible hazards that may result. Standard
and accepted safety precautions and equipment should be used
when working on electrical circuits and handling toxic or flammable
materials. Safety goggles and other required protection should be
used during any process that can cause material removal, such as
when cleaning components.
Read this manual carefully and understand the contents before
working on the refrigerator. Be aware of possible safety hazards
when you see the safety alert symbol on the refrigerator and in this
manual. A signal word follows the safety alert symbol and identifies
the danger of the hazard. Carefully read the descriptions of these
signal words to fully know their meanings. They are for your safety.
This signal word means a hazard, which
if ignored, can cause dangerous personal
injury, death.
This signal word means a hazard, which
if ignored, can cause small personal
injury or much property damage.
The storage of flammable materials
behind or around the refrigerator cre-
ates a fire hazard. Do not use the area
behind the refrigerator to store anything,
especially flammable materials (gasoline,
cleaning supplies, etc.).
A circuit overload can result in an electri-
cal fire if the wires and/or fuses are not
the correct size. Use only the wire and
fuse sizes as written in the “Installation
Manual.”
Incorrect installation, adjustment, change
to, or maintenance of this refrigerator can
cause personal injury, property damage,
or both. Have service and maintenance
work done by your dealer or by an autho-
rized Norcold Service Center.
Disconnect the AC and DC power
sources before doing any maintenance
work on the refrigerator.
Do not bypass or change the refrigerator’s
electrical components or features.
Do not spray liquids near electrical outlets,
connections, or the refrigerator compo-
nents. Many liquids are electrically con-
ductive and can cause a shock hazard,
electrical shorts, and in some cases fire.
ATTENTION
!
WARNING
CAUTION
!
ATTENTION
!
WARNING
Do not touch the evaporator or other
metal parts inside the refrigerator cabinet
with wet hands because they can freeze
to the refrigerator.
The rear of the refrigerator has sharp
edges and corners. To prevent cuts or
abrasions when working on the refrig-
erator, be careful and wear cut resistant
gloves.

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 4
About This Manual
This service manual provides maintenance, diagnostic, and repair
information for NORCOLD®DE/EV0041 Series, DE/EV0061,
Series, and DC0061 compressor refrigerators. It is a reference tool
designed for technicians who are knowledgeable in the theory and
operation of AC/DC electrical systems as installed in a variety of
recreational vehicles (RV).
All information, illustrations, and specifications contained in this
publication are based on the latest product information available
at the time of publication. NORCOLD®reserves the right to make
changes at any time without notice.
Certification and Code Requirements
NORCOLD® compressor refrigerators are certified under the lat-
est edition of UL250 standards.
Electrical components are compliant.
About Installation
Refrigerator installation must conform with the DE/EV0041
Series, DE/EV0061, Series, and DC0061 Installation Manual for
the NORCOLD®limited warranty to be in effect. Installation must
also comply with applicable local codes and standards set by the
relevant certification agency.
Replacement Parts
Use only authorized NORCOLD®replacement parts. Generic parts
do not meet NORCOLD®specifications for safety, reliability, and
performance. The use of unauthorized aftermarket or generic re-
placement parts voids the refrigerator’s limited warranty coverage.
INTRODUCTION
Technical Assistance
If unable to resolve technical issues using the information provided
in this manual, technical support is available through NORCOLD®
Customer Service Center:
Telephone: [phone]
Fax: [phone]
World Wide Web: www.norcold.com.
The following information is required to process technical support
requests:
■Refrigerator Model Number
■Refrigerator Serial Number
■Recreational Vehicle (RV) Make/Model/Year
Refrigerator Model Number
A Serial Number
B Model Number
C Amount of refrigerant in cooling system
D AC Voltage / Amperage
E DC Voltage / Amperage
Fig. 1 - Refrigerator information label location
xxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxx
D
E
S
I
G
N
C
E
R
T
I
F
i
E
D
NORC OLD
SA
Serial Number
Model Number
x.xx
LBS.
test pressure
xxx VOLTS - AC xx HZ
x.xx AMPS xxx Watts
xx VDC xx HZ
x.x AMPS xx xx Watts
Group Code
Input Pressure
BTUH
Refrigerant
xxxxxxxxxxxxxx xxxxxxxxxxxxx
xxxxxxxxxxxxxxx xxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxx xxxxx
xxxxxxxxxxxxxxxxxxxxx xxxxxx
xxxxxxxxxxxxxxxxxxxxx xxxx
xxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxx xxxxx
xxxxxxxxxxxxxxxxxxxxxxx xx
xxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxx xxxxx
xxxxxxxxxxxxxxxxxx xxxxx
D
E
S
I
G
N
C
E
R
T
I
F
i
E
SA
NOR
COLD
x
x
x
x
xx
x
x
x
x
x
x
x
xx
x
x
x
x
x
x
xx
x
x
x
x
E
CD
A
B

5 SERVICE MANUALwww.norcold.com
SPECIFICATIONS
Internal Capacities
Total capacity
DE0041 / EV0041 ------------------------------------------------------------------------------- 3.6 cubic feet
DC0061 / DE0061 / EV0061 ------------------------------------------------------------------ 7.0 cubic feet
Controls
Type ------------------------------------------------------------------------------------------------------ Electronic
ON/OFF / TEMP SET switches ---------------------------------------------------------------------- Manual
Temperature setting range ------------------------------------------------- 0=OFF, 1=cold to 5=coldest
Temperature sensing devices -----------------------------------------------------Capillary Tube Sensor
Off-level Operating Limits
Side-to-side ----------------------------------------------------------30 degrees maximum at refrigerator
Front-to-back --------------------------------------------------------30 degrees maximum at refrigerator
Voltage Requirements
DE0041, DE0061,EV0041, EV0061, DC0061
12 VDC / 24 VDC
Minimum (cut-out)-------------------------------------------------------------------10.9 VDC / 23.8 VDC
Restart (cut-in) -----------------------------------------------------------------------12.2 VDC / 25.2 VDC
Maximum ------------------------------------------------------------------------------17.0 VDC / 31.5 VDC
Fuse ---------------------------------------------------------------------------------------------------------- 15 A
EV0041, EV0061
220 VAC
Nominal --------------------------------------------------------------------------- 205 - 253 VAC, 49/51 Hz
Minimum------------------------------------------------------------------------------------------------- 90 VAC
Maximum ---------------------------------------------------------------------------------------------- 267 VAC
DE0041, DE0061
120 VAC
Nominal --------------------------------------------------------------------------- 108 - 132 VAC, 59/61 Hz
Minimum------------------------------------------------------------------------------------------------- 90 VAC
Maximum ---------------------------------------------------------------------------------------------- 267 VAC
Current Draw
Fan ---------------------------------------------------------------------------------------------------------- 150 mA
Interior light / Divider Heater (DC / DE / EV0061 only)-------------------------------- 0.66 A / 0.20 A
Refrigerator:
12.8 VDC / 24 VDC
Startup------------------------------------------------------------------------------------------------ 8 A / 4 A
Stabilization at 70°F Ambient --------------------------------------------------------------- 6.5 A / 3.1A
120 VAC / 240 VAC
Stabilization at 70°F Ambient --------------------------------------------------------------- 0.8 A / 0.4A

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 6
Fig. 2 - DE/EV0041 Models
No. Description
A Lower Vent
BSide Trim Piece
CControl Module
DKnob Thermostat
E Upper Vent / Control Cover
FThermostat
Exploded Views - DE/EV0041
G Foam Plug PanelAssembly
H Relay
I DE / EV0041 Interior Freezer Door
J CompressorAssembly
K Condenser Coil
L DE / EV0041 Door Dike
M Evaporator Drip Tray
N000045a
N000044a
A
B
C
D
I
J
K
L
E
F
G
H
M
B
C
E
K

7 SERVICE MANUALwww.norcold.com
Fig. 3 - DE/EV0061 and DC0061 Models
NO. DESCRIPTION
A Lower Vent
B Side Trim Piece
CKnob Thermostat
DUpper Vent / Control Cover
E Thermostat
Exploded Views - DE/EV0061 and DC0061
F Foam Plug PanelAssembly
G Relay
H CompressorAssembly
I Evaporator
J Evaporator Drip Tray
J
H
H
F
B
I
I
F
B
A
C
E
G
D
NOR000697A
NOR000698A

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 8
GENERAL INFORMATION
Ventilation
Overview
The refrigerator is made for a built-in installation. Correct ventila-
tion is necessary for the correct operation of the refrigerator and to
increase the life of the refrigerator cooling system.
Vents allow the natural flow of air that is necessary for good venti-
lation. Cooler air comes in through the lower vent, goes around the
refrigerator coils where it removes the excess heat from the refrig-
erator components, and goes out through the upper vent / control
cover. If this air flow is blocked or decreased, the refrigerator will
not cool correctly. Do not install the refrigerator in a completely
enclosed area such as a closet or a cabinet.
The refrigerator has built-in vents at
the top and the bottom. Make sure that
the air flow through these vents is not
blocked in any way. Blockage of the air
flow through these vents can:
●Shorten the life of the
refrigeratorcooling system.
●Cause poor cooling performance of the
refrigerator.
●Cause continuous operation of the
refrigerator cooling system.
●Cause fast battery discharge.
●Void the refrigerator warranty.
ATTENTION
!
WARNING
Installation
To confirm that installation is adequate, make sure that:
■Ventilation is adequate. Refer to "Ventilation" section.
■Electrical components are installed and operating in a safe
condition.
■Refrigerator is installed on a solid and level floor (not on carpet)
and secured.
■The floor is able to support the weight of the refrigerator and all
of its contents.
Electrical Connections
120 / 220 Volts AC Electrical Connection
The refrigerator AC power cord is equipped with a three-prong
plug for protection against shock hazard. It must be plugged into a
grounded three-prong receptacle.
Do not remove (cut) grounding plug from
the refrigerator AC power cord. Re-
moval of this prong can result in a severe
electrical shock, as well as voiding the
refrigerator’s electrical certification and
warranty.
• Make sure that the AC power cord is plugged into a ground-
ed three-prong receptacle.
12 / 24 Volts DC Electrical Connection
To reduce the risk of electrical interference from other DC appli-
ances and induction from voltage spikes:
• The refrigerator must have an independent 12/ 24 volt sup-
ply and not be on the same circuit as other DC appliances.
• Route the DC power supply wires, including the fuses,
directly from the battery to the refrigerator.
• Twist the DC supply wires between the battery and the
refrigerator.
Do not use a converter or a battery char-
ger to supply DC voltage to the refrigera-
tor. These devices do not supply filtered
DC power. When using a converter or a
battery charger, make sure a battery is
in-line between them and the refrigerator.
Polarity
If the DC leads are installed incorrectly,
the refrigerator will not operate.
■Connect the DC (positive) supply wire from the battery to the
red wire of the refrigerator
■Connect the DC (negative) supply wire from the battery to the
black wire of the refrigerator.
ATTENTION
!
WARNING
ATTENTION
!
WARNING
CAUTION
!

9 SERVICE MANUALwww.norcold.com
Diagnostic Pre-Checks
Diagnosing problems begins by starting with the basics. In many
cases, the problem can be solved by verifying the unit is operating
in acceptable conditions. Before performing detailed diagnostics
make sure:
• The power switch / thermostat is in the ON position.
• The door is closed and sealing correctly.
• The refrigerator is correctly installed and that the vents are
not blocked.
• The vehicle fuse or circuit breaker is intact.There may be
more than one over-current device in the refrigerator supply
circuit. Be sure to check both the RV and refrigerator.
• The ambient temperature is not unusually high (more than
110° F. / 43° C.).
• The air circulation inside the refrigerator is not decreased by
foods or by shelves that are covered with plastic, paper, etc.
• The freezer is defrosted.
Does
the refrigerator
operate?
YES Replace the thermostat.
NO
Refer to Diagnostic Symptom Chart.”
Disconnect wires from thermostat.
Put a jumper wire between terminals
#4 and #6 of the thermostat.
Refer to Fig. 4.
Put a jumper wire between terminals
COM and NO of the relay.
Refer to Fig. 5.
Does
the refrigerator
operate?
YES Replace the relay.
NO
1. Remove the refrigerator from
enclosure (refer to “Remove
Refrigerator” section.
2. Do the tests in “Self - Test
Diagnostics” section.
Are any
error codes
found?
YES Refer to “Self - Test Diagnostic Chart.”
NO
NOR000832A
DIAGNOSTICS

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 10
Fig. 4 - Thermostat Terminals
Fig. 5 - Relay Terminals
No. Description
A Thermostat Terminal #3
BThermostat Terminal #4
CThermostat Terminal #6
DRelay Terminal NO
E Relay Terminal COM
NOR000833A
A
B
C
NC NO
COM
NOR000055A
DE
Self-Test Diagnostics
The unit’s control module is equipped with a self-test diagnostic
function which can be read using a light emitting diode (LED). To
access the error codes displayed in the control module, you will
need the items in Fig. 2. Refer to Fig. 3 - Fig. 3.5 for diagnostic
instructions.
Fig. 6 - LED and connectors
Reference Description
A (1x) 10 mALED with wire leads
A1 (1x) 1/4 inch push-on female connectors (Black)
A2 (1x) 1/4 inch push-on female connectors (Red)
B 1/4 inch adapter with one (1) female and two (2) male connections
C 12 VDC Input Wire
D 12 VDC Terminal "+"
E Control Module
F Terminal "D"
NOR00000033A
A
B
A2
A1
Connecting the LED
Refer to Fig. 6, and Figs. 7.1-7.5
1. Attach the two (2) female blade connectors (A1, A2) to the
wire leads of the LED (A).
Fig. 7.1 - Attach Blade Connectors
2. On the control module (E), disconnect the 12 VDC input wire
(C) from the "+" terminal (D).
Fig. 7.2 - Disconnect 12 VDC
3. Connect the blade adapter (B) to the "+" (D) terminal.
Fig. 7.3 - Connect Blade Adapter.
4. Connect the black LED wire (A1) to terminal "D" (F); connect
the red LED wire (A2) to the one side of blade (B).
A
A2
A1
1
1
_
+
+
F
D
C
P
T
12/24 Vdc
E
CD
2
2
_
+
+
F
D
C
P
T
12/24 Vdc
D
B
3
3

11 SERVICE MANUALwww.norcold.com
Self -Test Diagnostics - cont’d.
Fig. 7.4 - Connect LED
5. Connect the 12 VDC input wire (C) to the other side of adapter
blade (B).
Fig. 7.5 - Connect LED
Do NOT leave jumpers in place for nor-
mal operation.
Reading the LED
If an error code is activated in the control module (Fig. 8, D) and
the LED (Fig. 8, A) is connected, it will flash a number of times. The
number of flashes will depend on what error was recorded. Each
flash will last 1/4 second and after the code is flashed there will be
a delay, then the code will repeat.
Write down all error codes; then refer to "Self-Test Diagnostic
Chart" in this section.
Self-Test Diagnostic Chart
Flashes Description Action
1Battery Protection Cut-Out.
The voltage is outside the cut out setting. Perform Test A.
2Fan Over current Cut-Out.
The fan electrical load is more than 1.0 amp. Perform Test B.
3Motor Start Error.
The rotor is blocked or the differential pressure in the
refrigeration system is too high ( >5 bar).
Perform Test C.
4Minimum Motor Speed Error.
The motor can not maintain minimum speed (1850
rpm).
Perform Test D.
5Thermal Cutout of Electronic Unit.
The electronic unit is running too hot. Perform Test E.
_
+
+
F
D
C
P
T
12/24 Vdc
A2
A1
B
F
4
4
_
+
D
C
P
T
12/24 Vdc
F
A
C
5
5
NOR000019A-5c
C
B
NOTICE
Diagnostic Symptom Chart
Problem Possible Cause Action to Take
Not cooling, not turn-
ing on. ■Faulty thermostat.
■No power to control module.
■Faulty wire from control module to
compressor.
■Faulty control module.
■Faulty Compressor.
Perform Test F
Refrigerator gets too
cold. ■Bad capillary tube position.
■Faulty thermostat.
■Faulty control module.
Perform Test G
Refrigerator builds
frost inside. ■Door not closed.
■Damaged door gasket.
■Air leak at foam plug.
Perform Test H
Runs but does not
cool properly. ■High ambient temperatures .
■Blocked air ventilation.
■Frost build up.
■Condenser coil restricted.
■Faulty condenser fan.
■Faulty cooling unit.
Perform Test I
Will not run on DC
power. ■Blown fuse in DC circuit.
■Undersized wiring to refrigerator,
minimum #12 gauge wire required.
Refer to Owner's Manual for
recommend wire size.
■Partially discharged battery, volt-
age below 11.3 VDC at compres-
sor module.
■High resistance (voltage drop) in
supply circuit.
Perform Test J
Voltage within range
but refrigerator cuts
out.
Parts can cause a + / - 10 VDC which
can cause refrigerator voltage to
register within specification, but cutout
because of part variance.
Perform Test K
The refrigerator cools
to thermostat setting
but does not restart
until thawing begins
■Bad thermostat
■Bad cooling unit
■DC power cord
Perform Test L
Inefficient cooling
when power source is
greater than 27 volts
or onAC power
■Bad fan
■Bad controller Perform Test M
Fuse holder is warm
to the touch or ends
are discolored.
■Bad fuse
■Bad DC power cord Perform Test N
Refrigerator cools
in brief operational
periods followed by
restart process which
drains power source
(Short cycling)
■Bad thermostat
■Bad power cord
■Bad cooling unit
Perform Test O

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 12
Troubleshoot Compressor Control Module
Test A: Battery Protection Cut-Out
Before starting this procedure make sure the DC supply voltage to
the refrigerator is correct.
■At 12 VDC nominal input, the refrigerator DC supply voltage must
be:
• More than 12.2 VDC to start.
• Remain between 10.9 VDC to 17 VDC to continue opera-
tion.
■At 24 VDC nominal input, the refrigerator DC supply voltage
must be:
• More than 25.2 VDC to start.
• Remain between 23.8 VDC and 31.5 VDC to continue
operation.
TROUBLESHOOTING
Continued on next page.
Is the fuse
intact? NO Replace the fuse. Test the refrigerator.
YES
Inspect the fuse on the positve DC
supply that is connected to control
module terminal “+”.
With thermostat in OFF position,
measure voltage at the DC connector.
12 VDC
12.2 - 17.0?
24 VDC
25.2 - 31.5?
YES
Repair DC supply voltage.
Test the refrigerator.
NO
Make sure that the DC supply voltage
is correct.
Remove refrigerator from enclosure,
but do not disconnect the DC supply.
Complete the “Diagnostic Pre-Checks.”

13 SERVICE MANUALwww.norcold.com
NOR000834A
Continued from previous page.
YES
With thermostat in ”5” position,
measure volatage at DC connector.
NO
12 VDC
10.9 - 17.0?
24 VDC
23.8 - 31.5?
Repair DC supply voltage.
Test the refrigerator.
YES
With thermostat in ”5” position,
measure volatage at control module
terminal “+”.
NO
12 VDC
10.9 - 17.0?
24 VDC
23.8 - 31.5?
Repair refrigerator power cord.
Test the refrigerator.

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 14
Test B: Fan Over Current Cut-Out
Is the fan
operating?
NO
Replace the cooling unit.
YES
Replace control module.
Measure DC voltage at control
module ternminal “+”.
NO
Fan has failed. Replace the coolng unit.
YES
Remove refrigerator from enclosure,
but keep a power supply (either AC
or DC) connected.
With thermostat in ”5” position,
make sure that the condenser fan
is operating.
Complete the “Diagnostic Pre-Checks.”
12 VDC
12.2 - 17.0?
24 VDC
25.2 - 31.5?
NOR000835B

15 SERVICE MANUALwww.norcold.com
Test C: Motor Start Error
Does code
3 return? Replace the cooling unit.
YES
Repair complete.
NO
Remove refrigerator from enclosure,
but keep a power supply (either AC
or DC) connected.
Turn refrigerator OFF for a minimum
of three (3) minutes to allow internal
system pressures to equalize.
Turn refrigerator back ON.
Complete the “Diagnostic Pre-Checks.”
NOR000836B

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 16
Test D: Minimum Motor Speed Error
Is
input
voltage within
specification? Correct input voltage.
NO
Relace control module.
NO
Remove refrigerator from enclosure,
but keep a power supply (either AC
or DC) connected.
Make sure:
- Upper and lower vents are not
blocked.
- The refigeratgor is not overloaded
with hot items.
- The ambient operating temperature
is lower than 131°F (55° C).
- If DC power is not connected, a
minimum of 90 VAC is present
Measure input voltage.
- 12 VDC nominal inout voltage is
10.9 - 17.0 VDC.
- 24 VDC nominal input voltage is
23.8 - 31.5 VDC,120 VAC or
240 VAC.
YES
Is
unit
overloaded? Reduce load on unit.
YES
NO
Is fan
operating,
coils clean/not
blocked? Replace cooling unit.
YES
Complete the “Diagnostic Pre-Checks.”
NOR000837B

17 SERVICE MANUALwww.norcold.com
Test E: Thermal Cut-Out of Electronic Unit
The control module has a built in thermal protection which
stops the compressor operation if the control module
circuit board temperature is higher than 212° F (100° C).
NOTICE
Does code
5 return? Replace control module.
Repair complete.
NO
Remove refrigerator from enclosure,
but keep a power supply (either AC
or DC) connected.
Make sure:
- Upper and lower vents are not
blocked.
- The condenser coil is clean.
- The fan is operating.
- The ambient operating temperature
is lower than 131°F (55° C).
Test the unit.
YES
Complete the “Diagnostic Pre-Checks.”
NOR000838A

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 18
Troubleshoot Symptoms
Test F: Not Cooling - Not Turning On
Remove refrigerator from enclosure,
but keep a power supply (either AC
or DC) connected.
Any wires
disconnected
from
terminals?
Refer to “Wiring Diagram.” Connect wire.
Test unit.
YES
NO
Turn refrigerator ON. Both green
“ON” indicator light and interior light
should come on.
Do lights
come on? YES
NO
Is unit
connected to
DC power? YES
NO
Examine DC fuse. Replace if necessary.
With thermostat in the “OFF” position,
use a DVOM to check input voltage.
The DC voltage must be higher than
cut-in voltage for the desired voltage
input (12/24 VDC) or within
specifications for 120 VAC/240 VAC.
See “Specifications - Voltage
Requirements” section.
Is input
voltage
correct?
YES
NO Correct input voltage. Test unit.
Complete the “Diagnostic Pre-Checks.”
Continued on next page.

19 SERVICE MANUALwww.norcold.com
Continued from previous page.
YES
Make sure the DC input is connected
correctly:
- positive lead to “+” terminal.
- negative lead to ”-” terminal.
and/or AC input is connected
correctly:
- live line to “L” terminal.
- neutral line to “N” terminal.
Is input
connected
coorectly?
YES
NO Correct input connections. Test unit.
Remove control module and control
module base. Remove compressor
interface cover. Unplug compressor
wire harness at each end. Check
continuity of compressor wire harness.
Is
compressor
wire harness
OK?
YES
NO Replace compressor wire harness.
Test unit.
With compressor harness unplugged
from the compressor, measure
resistance between all three (3) current
lead-in pins on the compressor.
Are
measured
values about
the same?
NO
Replace the control module.
YES
Replace the cooling unit.
NOR000839A

Series DE/EV0041, Series DE/EV0061, DC0061 www.norcold.com 20
Test G: Refrigerator Gets Too Cold
Correct
position? Reposition capillary tube. Test unit.
Replace the control module. Test unit.
NO
Examine the position of the capillary
tube. Capillary tube should be fully
inserted into the pocket in the
evaporator plate.
Disconnect wires from the thermostat.
NO
YES
Did
unit stop
operating? Replace the thermostat.
YES
Remove refrigerator from enclosure,
but keep a power supply (either AC
or DC) connected.
Disconnect thermostat wires at
control module terminals”C” and “T”.
NO
Did
unit stop
operating? Repair shorted wires between thermostat
and control module. Test unit.
YES
Complete the “Diagnostic Pre-Checks.”
NOR000840B