Norcold 1200 User manual

Gas/Electric Refrigerators
Service Manual
DO NOT install this refrigerator in below deck marine applications. Do not install
this refrigerator in xed indoor cabin or other dwelling applications. This refrig-
erator must use only NORCOLD designed and approved outside air intake and
exhaust ventilation for correct and safe operation. Any other ventilation could
cause lethal combustion exhaust fumes and or/explosive propane gas fumes to
be in the living area and/or below deck.
WARNING
120X-IMXX
1200XX
MODELS
Publication No. 618968C (02-27-07)
© 2004 NORCOLD, INc. All rights reserved.

1200XX/120X-IMXX Models Refrigerator Service Manual
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1200XX/120X-IMXX ModelsRefrigerator Service Manual
Table of Contents
INTRODUCTION ................................................................... 1
About this Manual.................................................. 1
Model Identication................................................ 1
Information Label................................................... 1
Cooling Unit Serial Number ................................... 1
Certication and Code Requirements.................... 1
About Installation ................................................... 1
Replacement Partsi ............................................... 1
Technical Assistance.............................................. 1
SAFETY AWARENESS .......................................................... 3
Safety Notice ......................................................... 3
Attention Statements ............................................. 3
Safety Statements ................................................. 3
SPECIFICATIONS ................................................................. 4
1200XX/120X-IMXX Models.................................. 4
TROUBLESHOOTING QUICK REFERENCE GUIDE ....................... 5
DISPLAYED FAULT CODES: S/N832170 & LOWER ................. 6
DISPLAYED FAULT CODES S/N832171 & HIGHER ................. 8
TROUBLESHOOTING FLOWCHARTS......................................... 9
Blank Display – Refrigerator does not turn on....... 9
"no" "LP" / "no" "FL" Fault Code ......................... 10
"dc" "LO" Fault Code ............................................11
"Sr" "FS"/"Sr" Fault Code......................................11
"dc" "HI" Fault Code............................................. 16
"Sr" "CL"/"AC" "rE" Fault Code ............................ 16
"no" "AC" Fault Code .......................................... 17
"AC" "LO" Fault Code .......................................... 18
"AC" "HI" Fault Code ........................................... 18
"AC" "HE" Fault Code .......................................... 19
"dr" Fault Code .................................................... 20
Thermistor Open.................................................. 21
Backup Operating System (BOS)........................ 21
1200XX/120X-IMXX Backup Operation, S/N
832170 and Lower............................................... 21
1200XX/120X-IMXX Backup Operation, S/N
832171 and higher............................................... 21
Power Board Resetting Procedurei ..................... 22
"no" "co" Fault Code S/N 832171 and higheri ..... 22
VENTILATION ................................................................... 19
Roof Exhaust Venting .......................................... 19
Air Intake Vent ..................................................... 19
Roof Exhaust Vent............................................... 19
Bafes.................................................................. 20
Vertical Angled Bafes ......................................... 20
Double Sidewall Venting...................................... 21
Air Intake Vent ..................................................... 21
Sidewall Exhaust Vent ......................................... 21
LP GAS SYSTEMI28
Pressure Requirements....................................... 24
Components ........................................................ 24
Testing for LP Gas Leaks..................................... 25
Gas Valve ............................................................ 25
Solenoid Gas Valve Connections ........................ 25
Replacing Old Style Gas Valve............................ 25
Burner Tube......................................................... 26
Burner .................................................................. 26
Orice .................................................................. 26
Flue...................................................................... 27
Flue Cap .............................................................. 27
Flue Bafe............................................................ 27
Burner Cleaning Procedure ................................. 28
ELECTRICAL REQUIREMENTS/COMPONENTS .......................... 29
DC Voltage Requirements and Polarity ............... 29
Power Board DC Fuse......................................... 29
DC Power Wiring Requirements.......................... 29
AC/DC Converter as Power Source .................... 29
Divider Heater...................................................... 29
Lamp/Thermistor Assembly ................................. 29
AC Power Requirements ..................................... 30
AC Heaters .......................................................... 30
AC Heaters Circuit Fuse ...................................... 30
Power Board AC Power Cord .............................. 30
Ice Maker AC Power Cord - Earlier Models......... 31
Ice Maker AC Power Cord ................................... 31
12 volt DC Fans................................................... 31
COOLING UNIT ................................................................ 32
Description ...................................................................... 32
Heat Absorption ................................................... 32
Leveled Operation ............................................... 32
Gradual Decrease in Cooling Efciency....................... 32
Cooling Performance Monitoring Control .................... 32
Cooling Unit Monitoring Control Operation.......... 33
First "no co" Fault Ocurrance............................... 33
Second "no co" Fault Ocurrence ......................... 33
Refrigerant Leakage ....................................................... 33
Disposal of Cooling Unit ................................................ 33
Cooling System Diagnostic Flowchart ......................... 34
Replacing the Cooling Unit ............................................ 36
Removing the Refrigerator and Cooling Unit....... 36
Removing Cooling Unit........................................ 36
Installation of Replacement Cooling Unit............ 36
Reinstallation of Refrigerator into Enclosure ....... 36
ELECTRONIC COMPONENTS................................................ 40
Power Board.................................................................... 40
Removal–Power Board........................................ 40
I

1200XX/120X-IMXX Models Refrigerator Service Manual
Installation–Power Board..................................... 40
CONTROLS...................................................................... 41
Optical Control Display Assembly ................................ 41
AUTO AC Operation ............................................ 41
Modes of Operation, S/N 832170 and Lower ................ 42
AUTO................................................................... 42
AUTO LP Operation............................................. 42
Shift from AUTO LP GAS to AUTO AC ................ 42
No AC Power and No Flame................................ 42
Troubleshooting No Flame and No AC Faults ..... 43
AC Manual Mode ............................................................. 43
No AC Power Present or Loss of AC Power ........ 43
AC Power Restored............................................. 43
Troubleshooting "no AC" Fault ............................ 43
LP Manual Mode.............................................................. 43
Modes of Operation, S/N 832171 and Higheri .............. 44
AUTO................................................................... 44
AUTO AC Operation ............................................ 44
AUTO LP Operation............................................. 44
Shift from AUTO LP GAS to AUTO AC ................ 44
No AC Power and No Flame................................ 44
Troubleshooting No Flame and No AC Fault ....... 44
AC Manual Mode ............................................................. 45
No AC Power or Loss of AC Power ..................... 45
AC Power Restored............................................. 45
Troubleshooting "no AC" Fault ............................ 45
LP Manual Mode.............................................................. 45
DIAGNOSTIC MODE - S/N 832170 AND LOWER................... 46
Diagnostic Mode ............................................................. 46
Accessing the Diagnostic Mode........................... 46
Changing Screens ............................................... 46
Exiting the Diagnostic Mode ................................ 46
Screens and Diagnostic LEDS Information, Units with
S/N 832170 and Lower .................................................... 47
DIAGNOSTIC MODE - UNITS S/N 832171 AND HIGHER ......... 49
Diagnostic Mode ............................................................. 49
Accessing the Diagnostic Mode........................... 49
Changing Screens ............................................... 49
Exiting the Diagnostic Mode ................................ 49
Screens and Diagnostic Segments Information .......... 50
WIRING PICTORIAL AND DIAGRAM/SN 832170 AND LOWER .. 52
WIRING PICTORIAL AND DIAGRAM/SN 832171 AND HIGHER.. 54
ICE MAKER COMPONENTS AND SERVICE .............................. 56
Specications.................................................................. 56
Wire Harness ................................................................... 56
Water Fill Tube................................................................. 57
Water Fill Line.................................................................. 57
12 volt DC Water Line Heater ......................................... 57
Water Valve (Without Water Dispenser) ........................ 58
Water Valve Replacement Procedure.................. 58
Ice Maker Troubleshooting Chart .................................. 59
Water Valve Service ....................................................... 59
Replacing Ice Maker ....................................................... 60
Cycle Testing Ice Make................................................... 61
Checking Water Valve Operation................................... 61
Water Fill Adjustment ..................................................... 62
Checking Water Valve Solenoid Resistance................. 64
Checking Mold Heater Resistance ................................ 63
Checking Voltage to Motor............................................. 63
Winterization ................................................................... 63
II

1200XX/120X-IMXX ModelsRefrigerator Service Manual
About this Manual
This service manual provides maintenance, diagnostic,
and repair information for NORCOLD, INC. model
1200XX/120X-IMXX gas absorption refrigerators. It
is a reference tool designed for technicians who are
knowledgeable in the theory and operation of gas/
electric absorption refrigerators, liqueed petroleum (LP)
gas (propane) system, and AC/DC electrical systems as
installed in a variety of recreational vehicles (RV).
All information, illustrations, and specications
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.
Model Identication
Model 1200XX/120X-IMXX are 2-way refrigerators that
can operate on AC power or LP gas. The electronic
controls operate on 12 Vdc.
Letter(s) appended to the model number identify factory
installed accessories. For example, a 1200-IMSS is
a 2-way refrigerator equipped with an ice maker and
stainless steel doors.
Information Label
The information label is located in the upper right corner
of the fresh food compartment just below the divider.
See Figure 1, page 2. The label provides the following
information:
n Serial number.
n Model number.
n LP gas (propane) pressure.
n Btu/hr.
n AC voltage and amperage.
n DC voltage and amperage.
n Design certication.
n Vent kit requirement.
Cooling Unit Serial Number
The cooling unit has a separate serial number that
appears on the cooling unit bar code label. The label
is afxed to the surface of the cooling unit leveling
chamber. See Figure 2, page 2.
INTRODUCTION
Certication and Code Requirements
NORCOLD®1200XX/120X-IMXX gas/electric absorption
refrigerators are certied under the latest edition of ANSI
Z21.19B standards for installation in mobile homes or
recreational vehicles. NORCOLD, INC. 1200XX/120X-
IMXX gas/electric absorption refrigerators are also
certied with the Canadian Standards Association,
CAN/CGA-1.4-M94.
Electrical components are compliant.
About Installation
Refrigerator installation must conform with the 1200XX/
120X-IMXX Installation Manual for the NORCOLD, INC.
limited warranty to be in effect. Installation must also
comply with applicable local codes and standards set by
the applicable certication agency.
Replacement Parts
Use only authorized NORCOLD®replacement parts.
Generic parts do not meet NORCOLD® specications
for safety, reliability, and performance. The use of
unauthorized aftermarket or generic replacement parts
voids the refrigerator's limited warranty coverage.
Technical Assistance
If unable to resolve technical issues using the
information provided in this manual, technical support for
service technicians is available through the NORCOLD,
INC. Customer Service Center:
'Telephone: ...................................1-800-444-7210.
7Fax: ..............................................1-937-497-3183.
;World Wide Web: ......................www.norcold.com.
The following information is required to process
technical support requests:
n Model number.
n Serial number.
n Make, model, and year of recreational vehicle.
1

1200XX/120X-IMXX Models Refrigerator Service Manual
Figure 1. Refrigerator information label location
Figure 2. Cooling unit bar code label location
NORCOLD
SerialNumber
700000
Madein USA
NORCOLD
Serial Number
XXXXXX
Made in USA
Plain text label
NORCOLD
Serial Number
XXXXXX
Made in USA
Bar code label
1 COLD-
9 COLDEST
ON
SET TEMP MODE ON/OFF
NORCOLD. INC.
SIDNEY, OHIO
pourle GPL, equipped por le propan
TESTED FOR LP GAS: EQUIPPED FOR PROPANE / Teste
3.8 Amps 456 Watts
SUPPLY
alimentati
11 "WC 10.5 "WC
BURNER
bruleur
120VAC
60Hz
12VDC
2.54 LBS
REFRIGERANT/frigorigene
R707
TEST PRESSURE /
D'ESSAI 800 PSI
1.90 Amps 23 Watts
SERIAL # / N de serie
XXXXXXX
MODEL # / N de modele
GROUP CODE / code de
INPUT / puissance
1200LRIM
For recreational vehicle installation
Min. Installation clearance 0" sides, top
bottom, back. Install only with Kit #3
See installation instructions
Pour installation vehicule de plaisance
Degagement minimum pour I'installation
0" cotes, haut,bas, arriere, Installer
uniquement avec latrousse n_3
Voir les instructions d'installation.
618860
30916
2200 BTUH
CSA-1.10-2003
REFRIGERATORS
ANZI Z221.19-2003
REFRIGERATORS
D
E
S
I
G
N
C
R
E
T
I
F
I
E
D
CERTIFIED
RR
2

1200XX/120X-IMXX ModelsRefrigerator Service Manual
WARNING
The above heading identies hazards or
conditions, which if ignored can cause serious
injury, death, and/or extensive property
damage.
Safety Statements
Do not modify, alter, or equip the refrigerator to the
use of any other fuel (natural gas, butane, etc.). 1200
refrigerators are designed and equipped for the use of LP
gas–propane gas–only.
Incorrect installation, adjustment, alteration, or
maintenance of the refrigerator can cause personal injury,
property damage, or both.
Do not smoke, light res, or create sparks when
working on the propane gas system.
Do not use an open ame for leak testing any of the
propane gas system components. Propane gas is highly
ammable and explosive.
Always use two wrenches to tighten or loosen LP
gas connections. Damaged connections, piping, and
components create the potential for gas leaks.
All electrical connections and repairs to the refrigerator
must comply with all applicable codes. Refer to the
certication and code requirements section of the 1200XX/
120X-IMXX Installation Manual for more information.
Do not work on live electrical circuits. Turn off
AC power and DC power sources before attempting
to remove, service, or repair any of the refrigerator's
electrical or electronic components.
Do not modify, bypass, or eliminate any of the
refrigerator's electrical components, electronic circuits, or
propane gas system components.
Do not wet or spray liquids on or near electrical
connections or electronic components. Most liquids,
including leak detection solutions, are electrically
conductive and pose the potential for an electric shock
hazard, short electrical components, damage electronic
circuits, and/or ignite a re.
Do not use leak test solutions that contain ammonia or
chlorine. Ammonia and chlorine degrade copper and brass
components.
Do not try to repair or recharge the cooling unit. Do not
bend, drop, weld, drill, puncture, saw, or strike the cooling
unit.
Handle a leaking cooling unit with extreme caution!
The cooling unit contains ammonia, hydrogen, and sodium
chromate. Ammonia can cause severe skin and eye burns.
Hydrogen is highly ammable, can ignite, and burns with
an intense ame. Certain chromium compounds, such as
sodium chromate, are carcinogenic.
Do not use extension cords. Do not remove the
grounding prong from the refrigerator AC power cord. Do
not use a two prong adapter to connect the refrigerator to
the ac outlet.
Do not over-fuse electrical circuits. Use specied fuses
and AWG wire sizes. The "Specications" section of this
manual provides fuse size information. Refer to the 1200XX/
120X-IMXX Installation Manual for the correct AWG wire
size specications.
Prevent child entrapment! Before disposing of the
refrigerator, remove all doors and fasten all shelves with
retainers.
Some of the refrigerator's metal components have sharp
corners and edges. Wear hand protection, such as cut
resistant gloves, and exercise extreme care when handling
the refrigerator.
Make sure all hardware, such as hinges and fasteners
(retaining screws, etc.), is properly fastened.
SAFETY AWARENESS
Safety Notice
It is not possible to anticipate all of the conceivable
ways or conditions 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
ammable materials. Safety goggles and other required
protection should be used during any process that can
cause material to become airborne, such as removing a
leaking cooling unit and cleaning components.
Attention Statements
The safety alert symbol followed by the word
WARNING or CAUTION identies potential safety
hazards or conditions.
The safety alert symbol with the appropriate heading
appears on all safety labels posted on the refrigerator
and safety awareness notices presented throughout this
manual.
CAUTION
The above heading identies hazards, which if
ignored can cause injury and/or property damage.
3

1200XX/120X-IMXX Models Refrigerator Service Manual
Storage volume
Freezer ------------------------------------------------------------------------------------------------------------------------ 1.3 ft.3each
Fresh food compartment--------------------------------------------------------------------------------------------------------- 8.0 ft.3
Rough opening dimensions (H x W x D)
1200XX/120X-IMXX----------------------------------------------------------------------------------- 63
1/4 in. x 32 11/16 in. x 24 in.
Decorative panels dimensions
Thickness ---------------------------------------------------------------------------------------------------------------------------- 3/16 in.
Freezer door (H x W) ------------------------------------------------------------------------- 17
17/32 in. x 16 11/16 in. (each door)
Fresh food compartment door ------------------------------------------------------------- 40
11/32 in. x 16 13/64 in. (each door)
Controls
Type ------------------------------------------------------------------------------------- Electronic with built-in diagnostic function
ON/OFF/MODE/TEMP SET switches ------------------------------------------------------------------Flush push-button style
Temperature settings ---------------------------------------------------------------------------------------------- 1=cold, 9=coldest
Temperature sensor---------------------------------------------------------------------------------------- Thermistor, n-mounted
Off-level operating limits
Side-to-side--------------------------------------------------------------------------------------------------------3 degrees maximum
Front-to-back------------------------------------------------------------------------------------------------------6 degrees maximum
DC power
Controls operating voltage ----------------------------------------------------------------------------------------- 10.5 to 15.4 Vdc
DC fuse (F1 in power board)-------------------------------------------------------------------------------------------------------------
Units with serial numbers 51660 and lower---------------------------------- 3 A (violet color), automotive blade type
Units with serial numbers 51661 to 8321171 -------------------------Two, 3 A (violet color), automotive blade type
Units with serial numbers 8321172 and higher --------------------------------5 A (tan color), automotive blade type
DC amp draws (at nominal 12 Vdc)
Automatic ignition------------------------------------------------------------------------------------------------------------------ 0.50 A
Moisture reduction heater and divider heater------------------------------------------------------------------------------- 0.70 A
Fresh food compartment lamp ------------------------------------------------------------------------------------------------- 0.46 A
Gas valve ---------------------------------------------------------------------------------------------------------------------------0.146 A
Fans (2) ------------------------------------------------------------------------------------------------------------------ 0.30 A (per fan)
AC power
AC heater operating voltage requirements----------------------------------------------------------------------- 108 to 132 Vac
Fuse AC heater circuit (F3 in power board) ------------------------------------- 5 A, 1/4 in. x 1
1/4 in. AGC type fast acting
AC heater rating------------------------------------------------------------------------- 225 W @ 120 Vac (resistance of 64 Ω)
LP gas (propane)
Operating pressure----------------------------------------------------------------------------------------------- 10.5 to 11.5 in. w.c.
Heat input---------------------------------------------------------------------------------------------------- 2200 Btu/h @ 11 in. w.c.
Orice, old style ---------------------------------------------------------------------------------------------------------- 0.190 jeweled
Orice, new style---------------------------------------------------------------------------------------------------------------------LP18
Gas ignition----------------------------------------------------------------------------------- Automatic with ame sensing circuit
Electrode tip-to-burner air gap------------------------------------------------------------------------------------------ 1/8 to 3/16 in.
1200XX/120X-IMXX Models
SPECIFICATIONS
4

1200XX/120X-IMXX ModelsRefrigerator Service Manual
TROUBLESHOOTING – QUICK REFERENCE GUIDE
Problem Possible Cause Checks/Reference
No AC power to refrigerator.
F3 fuse in power board open.
AC heater failed open.
Check LP gas supply and valves.
Set electrode to 1/8 to 3/16 in.
Replace spark/sense electrode.
Replace power board. See page 40.
See page 9.
Check 12 volt DC connections.
Check F1 fuse.
No 12 VDC power to refrigerator.
Faulty/loose 12 Vdc connections.
F1 fuse in power board open.
See page 13.
Check F3 fuse.
Check heaters resistance and continuity.
Ventilation obstructed.
AC voltage low.
Check enclosure for air flow obstructions.
Check AC voltage input.
No LP gas.
Incorrect electrode-to-burner gap.
Faulty spark/sense electrode assembly.
Flame sensing circuit failure.
Ventilation obstructed.
Incorrect LP gas pressure.
Dirty burner.
Missing flue baffle.
Flue cap blocked.
Check enclosure for obstructed air flow.
Set gas pressure to 10.5 to 11.5 in. w.c.
Clean burner. See page 27.
Replace flue baffle. See page 27.
Clear flue cap. See page 27.
The refrigerator does not turn ON.
The refrigerator does not cool on
AC power.
The refrigerator does not cool
efficiently on AC power.
The refrigerator does not operate
on LP gas.
Poor or no cooling.
The refrigerator does not
cool efficiently on LP gas.
Poor ventilation.
Off-level operation.
Dirty burner.
Low AC voltage.
Cooling fan inoperative (if present).
Improper installation.
Incorrect orifice.
Check enclosure for obstructed air flow.
Level unit. See page 32.
Clean burner. See page 28.
Check AC voltage input.
Test fan operation.
Check installation. See pages 19-23
and 1200 Installation Manual.
Install correct orifice (see Specifications).
5

1200XX/120X-IMXX Models Refrigerator Service Manual
DISPLAYED FAULT CODES: S/N 832170 & LOWER
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Audible
Alarm
"dc" and "LO" Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Audible
Alarm
"dc" and "HI" Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
"no" Flashing
"AC" LED Flashing
Audible
Alarm
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Mode LEDs off
LEDs off
Blank
Screen
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
"FS" and "Sr" Flashing
"LP GAS" LED Flashing
Audible
Alarm
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
"LP GAS" LED Flashing
"no" Flashing
Audible
Alarm
Code Probable Cause Reference
Burner failed to ignite or re-ignite See page 10.
Flame sense circuit failure See page 11.
DC voltage low See page 11.
DC voltage high See page 12.
Refrigerator turned off.
No 12 VDC to power board. See page 9.
F1 fuse open.
No AC power to refrigerator.
AC cord not plugged into power board. See page 13.
F3 fuse open.
Thermistor open, BOS operation. See page 17.
6

1200XX/120X-IMXX ModelsRefrigerator Service Manual
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
"AC" LED Flashing
"Sr" and "CL" Flashing
Audible
Alarm
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
"LO" Flashing
"AC" LED Flashing
Audible
Alarm
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Audible
Alarm
"HI" Flashing
"AC" LED Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Audible
Alarm
"Sr" and "OP" Flashing
"AC" LED Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Flashing "dr"
Audible
Alarm
"dr" Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Temperature LED Flashing
Selected Mode LED "ON"
AC relay stuck closed. See page 12.
AC voltage low. See page 14.
AC voltage high. See page 14.
AC heaters failed open. See page 15.
Fresh food comparment door open more than
2 minutes. See page 16
Code Probable Cause Reference
No AC power to refrigerator.
AC cord not plugged into power board. See page 13.
F3 fuse open.
Thermistor open, BOS operation. See page 17.
7

1200XX/120X-IMXX Models Refrigerator Service Manual
DISPLAYED FAULT CODES: S/N 832171 & HIGHER
Code Probable Cause Reference
8
See page 17.
Flashing
Temp
Setting
Backup operating system in operation.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See pages 18 , 32,
and 35.
Audible
Alarm
No cooling detected by the controls.
See page 16.
Audible
Alarm
Fresh food compartment door open more than 2 minutes.
Lamp reed relay switch faulty.
A
l
t
e
r
n
a
t
i
n
g
D
i
s
p
l
a
y
See page 15.
Audible
Alarm
AC heater failed open.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See page 14.AC voltage high.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See page 14.AC voltage low.
A
l
t
e
r
n
a
t
i
n
g
See page 12.
D
i
s
p
l
a
y
Audible
Alarm
AC relay stuck closed.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See page 13.
Audible
Alarm
No ac power available to refrigerator.
AC cord not plugged into power board.
F3 fuse open.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See page 12.DC voltage high.
See page 9.
Blank
Display
Screen
Refrigerator turned off.
No 12 Vdc to refrigerator.
F1 fuse open.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See page 10.
Audible
Alarm
The burner failed to ignite or reignite.
See page 11.
Audible
Alarm
Flame sense circuit failure.
D
i
s
p
l
a
y
A
l
t
e
r
n
a
t
i
n
g
See page 11.DC voltage low.
Audible
Alarm
Audible
Alarm
Audible
Alarm
Audible
Alarm

1200XX/120X-IMXX ModelsRefrigerator Service Manual
Before beginning this procedure make sure:
The RV DC power system is supplying 10.5 to 15.4 volts to the refrigerator.
No other RV appliances or lighting circuits are connected to the refrigerator DC circuit.
12 VDC input to the power board is wired according to the 1200XX/120X-IMXX Installation Manual.
Fault indicator displayed:
Measure voltage across
power board 12VDC and
GND1 connections.
1. No DC power input from RV to unit.
2. Faulty wiring or connectors.
NO
NO
YES
Check condition of F1 fuse
in power board. See Figure 3.
Replace fuse. Refer to Specifications on
page 4 for fuse size .
10.5
to
15.4 Vdc?
YES
Measure voltage at optical
control harness. See
Figure 4.
Replace power board.
See page 39.
YES
Voltage
present?
NO
Replace optical control assembly.
See page 40.
F1 fuse okay?
Wire harness optical
control display connector
White/red wire
White/violet wire
MINMAX RANGE HOLD
H
HzREL
mA
A
mV
V
V
OFF
!
!
ACOM V mA mA
1000VMAX
400mAMAX
FUSED
10AMAX
FUSED
PEAKMIN MAX
mA
CATII
41/2 DIGITS
1Seconds
87
TRUERMS MULTI METER
III
V
10.5 to 15.4 Vdc
V
MINMAXRANGEHOLD
H
Hz
REL
mA
A
mV
V
V
OFF
!
!
ACOMV
mA
m
A
1000VMAX
400mAMAX
FUSED
10AMAX
FUSED
PEAKMIN MAX
m
A
CATII
41/2 DIGITS
1Seconds
87
TRUERMSMULTIMETER
III
Good= 00.0 W
00.0
Bad = OL
F1 Fuse
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
All LEDs off
Blank
Screen
Mode LED off
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Blank
Screen
Blank Display – Refrigerator does not turn on
TROUBLESHOOTING FLOWCHARTS
Figure 3. Checking the DC fuse continuity. Figure 4. Measurement points for wire harness voltage.
9

1200XX/120X-IMXX Models Refrigerator Service Manual
"no" "LP" / "no" "FL" Fault Code – Burner failed to ignite/re-ignite
Air gap
1/8 to 3/16
inch?
Burner clean?
Before beginning this procedure make sure:
RV LP gas tank valve is open.
Refrigerator solenoid gas valve manual shut-off is open.
LP gas pressure at the solenoid gas valve pressure tap is 10.5 to 11.5 in. w.c.
Fault indicator displayed:
Clean and service burner.
See page 27.
NO
YES
Check that electrode-to-
burner air gap is correct.
NO
Set electrode-to-burner air gap
1/8 to 3/16 inch.
YES
Continuity?
Check spark/sense electrode
assembly for continuity.
NO
Replace spark/sense electrode
assembly.
Voltage
present?
YES
Check voltage across power
board terminals GV and
GV_GND.
NO
Replace power board.
See page 39.
Continuity?
YES
Check gas valve solenoid
wires for continuity.
NO
Replace gas valve wires.
YES
Check gas valve solenoid
resistance.
NO
Replace gas valve.
79 to 85 W?
Check burner.
YES
Faulty or obstructed gas valve.
Replace gas valve.
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Blinking LP GAS LED
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Flashing "no"
Flashing "no" and "FL"
Audible
Alarm
Audible
Alarm
10

1200XX/120X-IMXX ModelsRefrigerator Service Manual
"Sr" "FS"/"Sr" Fault Code – Flame sense circuit failure
"dc" "LO" Fault Code –dc voltage input to power board is lower than 10.5 volts
NOTE
Electronic controls operate on 12 volt DC. When an AC/DC converter is
used to supply DC power, the refrigerator circuit must be connected to the
appliance output terminals of the converter (ltered side).
If the refrigerator circuit is connected to the unltered side, the AC ripple
generated by the converter may cause a "dc LO" fault code to display.
To troubleshoot a "dc LO" fault, connect a charged 12 volt automotive
battery to the power board. If the "dc LO" code clears, the fault was caused
by unltered DC power.
If the "dc LO" code does not clear, replace the power board (see page
39).
Fault indicator displayed:
Replace power board.
See page 39.
Flame sense circuit failure.
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
"Sr" Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
"AC" LED Flashing
"Sr" and "FS" Flashing
Audible
Alarm
Audible
Alarm
Before beginning this procedure:
Make sure RV DC voltage to refrigerator is at least 10.5 and no more than 15.4 volts.
Determine if the "dc LO" fault code displays when the converter is the source of DC power.
Make sure no other appliance or lighting circuit is connected to the refrigerator DC circuit.
Fault indicator displayed:
Voltage
lower than
10.5 volts?
NO
Check RV 12 volt DC power supply to
refrigerator.
YES
See NOTE below to determine
and correct low "dc LO" fault.
Check for DC voltage input
to power board terminals
12VDC and GND1.
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Audible
Alarm
"dc" and "LO" Flashing
"dc" and "LO" Flashing
Audible
Alarm
11

1200XX/120X-IMXX Models Refrigerator Service Manual
"dc" "HI" Fault Code – DC voltage input to power board is higher than 15.4 volts
NOTE
Electronic controls operate on 12 volt DC. When an AC/DC converter is
used to supply DC power, the refrigerator circuit must be connected to the
appliance output terminals of the converter (ltered side).
If the refrigerator circuit is connected to the unltered side, the AC ripple
generated by the converter may cause a "dc HI" fault code to display.
To troubleshoot a "dc HI" fault, connect a charged 12 volt automotive battery
to the power board. If the "dc HI" code clears, the fault was caused by
unltered DC power. If the "dc HI" code does not clear, replace the power
board (see page 39).
"Sr" "CL"/"AC" "rE" Fault Code –AC relay stuck closed
Before beginning this procedure:
Make sure RV DC voltage to refrigerator is 10.5 to 15.4 volts.
Determine if the “dc” “HI” fault code displays when the converter is the source of DC power.
Fault indicator displayed:
Voltage
higher than
15.4 volts?
NO
Check RV DC power distribution to
refrigerator.
YES
See NOTE below to determine
and correct “dc” “HI” fault.
Check for DC voltage input
to power board terminals
12VDC and GND1.
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Audible
Alarm
"dc" and "HI" Flashing
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Audible
Alarm
"dc" and "HI" Flashing
Fault indicator displayed:
Replace power board.
See page 39.
Flame sense circuit failure.
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
"AC" and "rE" Flashing
Audible
Alarm
"Sr" and "CL" Flashing
Audible
Alarm
"AC" LED Flashing
12

1200XX/120X-IMXX ModelsRefrigerator Service Manual
"no" "AC" Fault Code – No AC power available
Before beginning this procedure make sure:
No other problems exist with the RV AC power supply.
No other appliances or lighting circuits are connected to the refrigerator AC circuit.
Extension cords are not being used to supply AC power to the refrigerator.
Fault indicator displayed:
F3 fuse okay?
1. Check AC power input from RV to unit.
2. Check for faulty AC power cord.
NO
NO
YES
Check condition of F3 fuse
in power board.
Replace fuse. See Specifications, page 4,
for fuse size.
108
to
132 volts?
YES
Check that fuse holder clips
are making full contact with
fuse.
Adjust clips to ensure fuse contacts are
firm in clips and making full contact.
YES
Clips okay?
NO
Replace power board.
See page 39.
Measure voltage at power
board AC cord connection.
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Audible
Alarm
"AC" and "no" Flashing
Audible
Alarm
"AC" LED Flashing
"no" Flashing
13

1200XX/120X-IMXX Models Refrigerator Service Manual
"AC" "LO" Fault Code – AC voltage low
"AC" "HI" Fault Code – AC voltage high
Before beginning this procedure:
Determine if a certain AC power source sets the "AC LO" fault code (generator, shore power, inverter).
Make sure no other appliance or lighting circuit is connected to the refrigerator AC circuit.
Make sure extension cords are not being used to supply AC power to the refrigerator.
Fault indicator displayed:
Fault related to RV AC power distribution
component or circuit supplying AC power
to refrigerator.
YES
NO Replace power board.
See page 39.
Voltage
lower than
108 Vac?
Measure voltage at power
board AC cord connection.
AC LED blinking
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Flashing "AC" and "LO"
Audible
Alarm
Audible
Alarm
"LO" Flashing
Before beginning this procedure:
Determine if a certain AC power source sets the "AC HI" fault code (generator, shore power, inverter).
Fault indicator displayed:
Fault related to RV AC power distribution
component or circuit supplying AC power
to refrigerator.
YES
NO
Replace power board.
See page 39.
Voltage
higher than
132 Vac?
Measure voltage at power
board AC cord connection.
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Audible
Alarm
"Sr" and "FS" Flashing
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
Audible
Alarm
"HI" Flashing
"AC" LED Flashing
14

1200XX/120X-IMXX ModelsRefrigerator Service Manual
"AC" "HE" Fault Code – AC heaters failed open
Figure 5. Checking AC heater resistance
Before beginning this procedure make sure:
RV AC voltage to the refrigerator is 108 to 132 volts.
No other appliance or lighting circuit is connected to the refrigerator AC circuit.
Fault indicator displayed:
Heaters
connections
okay?
NO
YES
Check AC heaters resistance.
See Figure 5.
NO
Replace AC heaters.
YES
Replace power board.
See page 39.
Check AC heaters wires for
loose or damaged connection.
Resistance
58 to 68 Ω ?
Repair or replace connectors. If
connectors cannot be replaced,
replace heaters.
AC LED blinking
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Flashing "AC" and "HE"
Audible
Alarm
Audible
Alarm
"OP and Sr" Flashing
MIN MAX RANGE HOLD
H
HzREL
mA
A
mV
V
V
OFF
!
!
ACOM V mA mA
1000VMAX
400mAMAX
FUSED
10AMAX
FUSED
PEAK MIN MAX
mA
CATII
4 1/2 DIGITS
1 Seconds
58 to 68
each heater
at room temperature
Yellow
Black
15

1200XX/120X-IMXX Models Refrigerator Service Manual
"dr" Fault Code – Door open for more than 2 minutes
Before beginning this procedure make sure:
Light/thermistor connector and wire harness connector are fully engaged and locked.
Fault indicator displayed:
Adjust striker plate.
NO
YES
Check operation of each
light switch.
NO
Replace faulty switch.
YES
Recheck each fresh food compartment
door for excessive vertical play.
Check that the door latch
striker plate is adjusted
correctly.
Light off
with switches
cosed?
Striker plate
okay?
NO
YES
Check food comparmnet
doors for vertical play Install Door Shim Kit, part number 625129.
Doors
aligned?
Cold Coldest
ON
OFF MODE
TEMP
SET
AC LP GASAUTO
1 COLD - 9 COLDEST SET TEMP MODE ON / OFF
on
Audible
Alarm
Audible
Alarm
16