Electrolux EI15IM55GS - 15 Inch Ice Maker User manual

5995504544 January 2008
Under the Counter Ice Maker
Service Manual
Models: EI15IM55GS, E15IM60GSS, and E15IM60GPS

2
ATTENTION!!!
This service manual is intended for use by persons having electrical and mechnical
training and a level of knowledge of these subjects generally considered acceptable in the
appliance repair trade. Electrolux Home Products cannot be responsible, nor assume any
liability, for injury or damage of any kind arising from the use of this manual.
©2007 Electrolux Home Products, Inc.
SAFE SERVICING PRACTICES - ALL APPLIANCES
To avoid personal injury and/or property damage, it is important that Safe Servicing
Practices be observed. The following are some limited examples of safe practices:
1. DO NOT attempt a product repair if you have any doubts as to your ability to
complete it in a safe and satisfactory manner.
2. Before servicing or moving an appliance:
• Remove the power cord from the electrical outlet, trip the circuit breaker to the
OFF position, or remove the fuse.
• Turn off the gas supply.
• Turn off the water supply.
3. Never interfere with the proper operation of any safety device.
4. USE ONLY REPLACEMENT PARTS CATALOGED FOR THIS APPLIANCE.
SUBSTITUTIONS MAY DEFEAT COMPLIANCE WITH SAFETY
STANDARDS SET FOR HOME APPLIANCES.
5. GROUNDING: The standard color coding for safety ground wires is GREEN, or
GREEN with YELLOW STRIPES. Ground leads are not to be used as current
carrying conductors. It is EXTREMELY important that the service technician
reestablish all safety grounds prior to completion of service. Failure to do so will
create a hazard.
6. Prior to returning the product to service, ensure that:
• All electrical connections are correct and secure
• All electrical leads are properly dressed and secured away from sharp edges,
high-temperature components, and moving parts
• All non-insulated electrical terminals, connectors, heaters, etc. are adequately
spaced away from all metal parts and panels
• All safety grounds (both internal and external) are correctly and securely
connected
• All panels are properly and securely reassembled
Safe Servicing Practices

3
Table of Contents
Safe Servicing Practices - All Appliances........................2
Installation
Leveling ..................................................................................4
Adjusting Door........................................................................4
Checking Door Alignment ....................................................4
Adjusting Door Alignment ....................................................5
General Instructions
Keypad Options.......................................................................6
ON/OFF.................................................................................6
Showroom Mode..................................................................6
Service Mode .......................................................................7
Blackout / Sabbath Mode......................................................7
Clean Cycle...........................................................................7
Force Harvest .......................................................................7
Forced Defrost......................................................................7
Ice Thickness Adjust.............................................................7
Temporary Shutdown / Office Mode.....................................7
Relay Status .........................................................................7
Service Information
Service Menu..........................................................................8
Error Codes.............................................................................8
Board Components.................................................................9
Electronic Control Quick Guide .............................................10
Keypad Options.....................................................................11
ON/OFF...............................................................................11
Viewing Actual Temperature ...............................................11
Changing From Fahrenheit to Celsius.................................11
Showroom Mode................................................................11
Service Mode .....................................................................11
Blackout / Sabbath Mode....................................................12
Model Number Change.......................................................12
Service Menu........................................................................12
Error Codes...........................................................................13
Electronic Control Quick Guide .............................................13
Thermister Types ..................................................................14
Refrigeration System Diagnosis Guide .................................14
Filter Drier Installation ..........................................................15
Evacuating and Recharging ..................................................15
Equipment Needed .............................................................16
Installing Equipment Needed..............................................16
Evacuating System .............................................................16
Charging the System ............................................................17
Preparing the Cyclinder ......................................................17
Final Leak Test ......................................................................17
Evacuating and Recharging Connections..............................18
Verify Refrigerant Type in System.........................................19
R-134a Refrigeration Systems..............................................19
Miscibility of R-134a and Ester Oil........................................19
Water in the Refrigeration System........................................20
Vacuum Pump Maintenance .................................................20
Refrigerant Leaks..................................................................21
Leak Detection....................................................................21
HFC-124a, CFC-12 Pressure Temperature Chart ...................22
Inhalation Toxicity.................................................................23
Cardiac Sensitization.............................................................23
Table of contents
Spills and leaks.....................................................................23
Skin and Eye Contact ............................................................23
Combustibility of HFC-134a..................................................24
Leak Testing .......................................................................24
Bulk Delivery and Storage ..................................................24
Filling and Charging Operations..........................................24
Refrigerant Recovery Systems ..........................................24
Thermal Decomposition........................................................24
Ice Cube Thickness Adjustment............................................25
Interval - As Required.........................................................25
Operating Environments/Climate Control Requirements.......26
Model EI151M55GS..............................................................26
Defrost Information............................................................26
Compressor / Coil Specifications........................................26
Operation............................................................................27
Thermister Outage..............................................................28
Service..................................................................................28
Troubleshooting....................................................................28
Display shows ER or P1 .....................................................28
No ice .................................................................................28
Too much ice......................................................................28
Too little ice ........................................................................29
Ice not sized to customer satisfaction ................................29
Noise ..................................................................................29
No water in trough..............................................................29
Ice does not release from evaporator .................................29
Poor ice quality...................................................................29
Water in ice bin ..................................................................29
Display showing something other than “ice” .....................29
Display showing random snaking of characters .................29
Display not illuminating but unit operating.........................29
Unit is not operating - no cooling - no fans........................29
Wiring Diagram.....................................................................30
Ice Production Rates ............................................................30
Prepare Plumbing.................................................................31
Gravity Drain ......................................................................31
Factory Installed Drain Pump .............................................31
Locally Installed Drain Pump..............................................33
U-CLR Drain Kit (Available for purchase) ...........................33
Self-Cleaning Cycle Instructions ...........................................36
Interior Storage Bin Cleaning................................................36
Parts Information
EI151M55GS Parts Section ..................................................37
Customer Call Guide
Concern / Response..............................................................45

4Installation
Leveling
It is extremely important that the unit is level for
maximum protection.
If it is not:
 • Doorsand/ordrawerswillnotworkproperly.
 • Unevensizedcubeswillbeformed.Ice
productionwillbereducedandwaterspilling
intothestorageareacanoccur,causing
theiceinthebintomeltprematurely.See
Figure1.
Remember,oorssurroundingadrainhavea
tendencytoslopetowardthedrain.
IMPORTANT
Properlyaligned,thedoorshouldbe1/8”below
thetopoftheunit’scabinet,NOTushwiththe
top.See Figure 4.
Adjusting Door
Checking Door Alignmemt
Theunit’sdoorisalignedatthefoctorybefore
shipment.However,itsalignmentcouldhavebeen
disturbedduringshipmentorduringdoorpanel
installation.
1 Comparethetopedgeofthedoortothetop
edgeofthecabinet.
2 Ifthedooredgeis1/8inchbelowand
paralleltothetopofthecabinet,itisadjusted
correctly.Ifitisnot,notewhethertheside
opositethehingeneedstobemovedUPor
DOWN,andusethefollowingprocedure:
 1. Usealeveltochecktheunitfromfrontto
backandfromsidetoside.See Figure 2.
Figure 1
CHECK
LEVEL
Figure 2
TURN FOOTTO ADJUST
Figure 3
 2. Iftheunitisnotlevel,adjustthefeetonthe
cornerasnecessary.See Figure 3.Rotating
thefeetclockwiseraisestheunit.
 3. Checkaftereachadjustment.Repeatthe
previousstepsasnecessaryuntiltheunitis
level.
1/8”
Figure 4

5
Installation
13
Checking Door Alignment -
Échelon Models
The unit’s door is aligned at the factory before shipment.
However, its alignment could have been disturbed during
shipment or during door panel installation.
IMPORTANTIMPORTANT
Properly aligned, the door should be 1/8" below the
top of the unit’s cabinet, NOT flush with the top
(Figure 5).
Figure 5
1. Compare the top edge of the door to the top edge of
the cabinet.
2. If the door edge is 1/8" below and parallel to the top of
the cabinet, it is adjusted correctly. If it is not, note
whether the side opposite the hinge needs to be moved
UP or DOWN, and use the following procedure.
Échelon Full Overlay
NOTE: If door is adjusted correctly, but panel is not square
with the adjacent cabinets, slight adjustments can be
made by drilling the holes in the vinyl-coated steel panel
slightly oversized (Figure 6).
Figure 6
Adjusting Door Alignment
1. Remove top hinge screw pin using a Phillips
screwdriver (Figure 7). Remove door by tilting
forward and lifting off bottom hinge pin.
Figure 7
2. With door upside-down, loosen but do not remove the
two screws on the door’s bottom hinge plate.
6 Adjust Door
1/8"
ULIN_0295_A
Drill 5/32" x3/8" Deep for use
with #10 x5/8" Wood Screw
and Nylon Spacer –
6 Places
1"±1/8"
1"±1/32"1"±1/32"
14-5/16"±1/4"
27"±1/4"
Rear View
of
Wood Panel
ULIN_0310_A
ULIN_0133_A
Figure 5
2 Withdoorupsidedown,loosenbutdonot
removethetwoscrewsonthedoor’sbottom
hingeplate.
3See Figures 6 and 7.Ifthetopfaredgeof
thedoorneedstomoveUP,movethehinge
platetowardtheoutsideofthedoor,then
retightenscrews.Ifthetopfaredgeofthe
doorneedstomoveDOWN,movethehinge
platetowardtheinsideofthedood,then
retightenscrews.
14
Figure 8
3. See Figure 8 and Figure 9 . If the top far edge of the
door needs to move UP, move the hinge plate toward
the outside of the door and retighten screws. If the top
far edge of the door needs to move DOWN, move the
hinge plate toward the inside of the door and retighten
screws.
Figure 9
4. Mount the door to recheck alignment and repeat steps
2 and 3 if further adjustment is necessary.
5. When top edge of door is parallel to top edge of
cabinet, remove the door and ensure the two screws
are secure.
6. Remove the door closers from the bottom hinge, clean
thoroughly and lubricate the mating surfaces with
petroleum jelly.
7. Reinstall the closers, lining up the bosses with holes in
hinge and hinge plate
(Figure 10) .
Figure 10
8. Mount the door, install top hinge pivot pin.
Checking Door Alignment -
Origins Models
The unit’s door is aligned at the factory before shipment.
However, its alignment could have been disturbed during
shipment or during door panel installation.
IMPORTANTIMPORTANT
Properly aligned, the door’s gasket should be firmly
in contact with the cabinet all the way around the
door (no gaps).
1. Carefully examine the door’s gasket to assure that it is
firmly in contact with the cabinet.
2. If the door is properly aligned, no further adjustment is
necessary. If it is not, use the following procedure.
Notch
Slotted
Mounting
Holes
Raise
Outside
Door Edge
Lower
Outside
Door Edge ULIN_0297_A
Angled Edge
Towards Center
of Door
Slotted
Mounting
Holes
Raise
Outside
Door Edge
Lower
Outside
Door Edge
ULIN_0311_A
2115WC, 2115WCOL, 2175WC, 2175WCOL Only
Door
Closer
Inserts
Boss
ULIN_0298a_A
Figure 6
Adjusting Door Alignment
14
Figure 8
3. See Figure 8 and Figure 9 . If the top far edge of the
door needs to move UP, move the hinge plate toward
the outside of the door and retighten screws. If the top
far edge of the door needs to move DOWN, move the
hinge plate toward the inside of the door and retighten
screws.
Figure 9
4. Mount the door to recheck alignment and repeat steps
2 and 3 if further adjustment is necessary.
5. When top edge of door is parallel to top edge of
cabinet, remove the door and ensure the two screws
are secure.
6. Remove the door closers from the bottom hinge, clean
thoroughly and lubricate the mating surfaces with
petroleum jelly.
7. Reinstall the closers, lining up the bosses with holes in
hinge and hinge plate
(Figure 10) .
Figure 10
8. Mount the door, install top hinge pivot pin.
Checking Door Alignment -
Origins Models
The unit’s door is aligned at the factory before shipment.
However, its alignment could have been disturbed during
shipment or during door panel installation.
IMPORTANTIMPORTANT
Properly aligned, the door’s gasket should be firmly
in contact with the cabinet all the way around the
door (no gaps).
1. Carefully examine the door’s gasket to assure that it is
firmly in contact with the cabinet.
2. If the door is properly aligned, no further adjustment is
necessary. If it is not, use the following procedure.
Notch
Slotted
Mounting
Holes
Raise
Outside
Door Edge
Lower
Outside
Door Edge ULIN_0297_A
Angled Edge
Towards Center
of Door
Slotted
Mounting
Holes
Raise
Outside
Door Edge
Lower
Outside
Door Edge
ULIN_0311_A
2115WC, 2115WCOL, 2175WC, 2175WCOL Only
Door
Closer
Inserts
Boss
ULIN_0298a_A
Figure 7
1 Removetop
hingescrewpin
usingaPhillips
serewdriver
(Figure 5).
Removedoorby
tiltingforwardand
liftingoffbottom
hingepin.
4 Mountthedoortorecheckalignmentand
repeatsteps2and3iffurtheradjustmentis
necessary.
5 Whentopedgeofdoorisparalleltotopedge
ofcabinet,removethedoorandensurethe
twoscrewsaresecure.
6 Removethedoorclosersfromthebottom
hinge,cleanthoroughlyandlubricatethe
matingsurfaceswithpetroleumjelly.
7 Reinstalltheclosers,liningupthebosses
withholesinhingeandhingeplate(Figure
8).
14
Figure 8
3. See Figure 8 and Figure 9 . If the top far edge of the
door needs to move UP, move the hinge plate toward
the outside of the door and retighten screws. If the top
far edge of the door needs to move DOWN, move the
hinge plate toward the inside of the door and retighten
screws.
Figure 9
4. Mount the door to recheck alignment and repeat steps
2 and 3 if further adjustment is necessary.
5. When top edge of door is parallel to top edge of
cabinet, remove the door and ensure the two screws
are secure.
6. Remove the door closers from the bottom hinge, clean
thoroughly and lubricate the mating surfaces with
petroleum jelly.
7. Reinstall the closers, lining up the bosses with holes in
hinge and hinge plate
(Figure 10) .
Figure 10
8. Mount the door, install top hinge pivot pin.
Checking Door Alignment -
Origins Models
The unit’s door is aligned at the factory before shipment.
However, its alignment could have been disturbed during
shipment or during door panel installation.
IMPORTANTIMPORTANT
Properly aligned, the door’s gasket should be firmly
in contact with the cabinet all the way around the
door (no gaps).
1. Carefully examine the door’s gasket to assure that it is
firmly in contact with the cabinet.
2. If the door is properly aligned, no further adjustment is
necessary. If it is not, use the following procedure.
Notch
Slotted
Mounting
Holes
Raise
Outside
Door Edge
Lower
Outside
Door Edge ULIN_0297_A
Angled Edge
Towards Center
of Door
Slotted
Mounting
Holes
Raise
Outside
Door Edge
Lower
Outside
Door Edge
ULIN_0311_A
2115WC, 2115WCOL, 2175WC, 2175WCOL Only
Door
Closer
Inserts
Boss
ULIN_0298a_A
Figure 8
8 Mountthedoorandinstalltophingepivot
pin.
Checking Door Alignment
Theunit’sdoorisalignedatthefoctorybefore
shipment.However,itsalignmentcouldhavebeen
disturbedduringshipmentorduringdoorpanel
installation.
IMPORTANT
Properlyaligned,thedoor’sgasketshouldbe
rmlyincontactwiththecabinetalltheway
aroundthedoor(nogaps).
1 Carefullyexaminethedoor’sgasketto
ensurethatitisrmlyincontactwiththe
cabinet.
2 Ifthedoorisproperlyaligned,nofurther
adjustmentisnecessary.Ifitisnot,usethe
followingprocedure:

6Installation / General Instructions
Adjusting Door Alignment
1.  Loosen(donotremove)topandbottom
hingescrews(Figures 9 and 10).
15
Adjusting Door Alignment
1. Loosen (do not remove) top and bottom hinge screws
(Figure 11 and Figure 12).
Figure 11
Figure 12
2. Align door squarely with cabinet. Make sure gasket is
firmly in contact with cabinet all the way around the
door (no gaps).
3. Tighten bottom hinge screws.
4. Tighten top hinge screws.
Checking Drawer Alignment
The unit’s drawers are aligned at the factory before
shipment. However, their alignment could have been
disturbed during shipment or during overlay panel
installation.
Figure 13
See Figure 13. Check each drawer to confirm that it is
aligned:
•Side-to-Side — When viewed from the top, the
drawer front should be square with the sides of the
cabinet.
•Front-to-Back — When viewed from the side, the
drawer front should be straight with the cabinet’s
sides, not cocked forward or back.
•Top-to-Bottom — When viewed from the front, the
drawer should be level horizontally.
If both drawers are properly aligned, no further
adjustment is necessary. If either drawer is not aligned,
carefully follow instructions to remove that drawer, make
the necessary adjustment and re-install the drawer.
ULIN_0293_A
ULIN_0104_A
7 Adjust Drawer
Aligned
Side-to-Side
Aligned
Front-to-Back
Aligned
Top-to-Bottom ULIN_0312_A
Figure 9
15
Adjusting Door Alignment
1. Loosen (do not remove) top and bottom hinge screws
(Figure 11 and Figure 12).
Figure 11
Figure 12
2. Align door squarely with cabinet. Make sure gasket is
firmly in contact with cabinet all the way around the
door (no gaps).
3. Tighten bottom hinge screws.
4. Tighten top hinge screws.
Checking Drawer Alignment
The unit’s drawers are aligned at the factory before
shipment. However, their alignment could have been
disturbed during shipment or during overlay panel
installation.
Figure 13
See Figure 13. Check each drawer to confirm that it is
aligned:
•Side-to-Side — When viewed from the top, the
drawer front should be square with the sides of the
cabinet.
•Front-to-Back — When viewed from the side, the
drawer front should be straight with the cabinet’s
sides, not cocked forward or back.
•Top-to-Bottom — When viewed from the front, the
drawer should be level horizontally.
If both drawers are properly aligned, no further
adjustment is necessary. If either drawer is not aligned,
carefully follow instructions to remove that drawer, make
the necessary adjustment and re-install the drawer.
ULIN_0293_A
ULIN_0104_A
7 Adjust Drawer
Aligned
Side-to-Side
Aligned
Front-to-Back
Aligned
Top-to-Bottom ULIN_0312_A
Figure 10
2. Aligndoorsquarelywithcabinet.Makesure
gasketisrmlyincontactwithcabinetallthe
wayaroundthedoor(nogaps).
3. Tightenbottomhingescrews.
4. Tightentophingescrews.
Keypad Options
WARNING
Electrocution can cause death or serious
injury. Take precautions when touching a
bare circuit board. Wear an anti-static wrist
strap and ground it to an electrical ground or
grounded water pipe. Handle circuit boards
carefully and avoid touching components.
When touching key combinations in which
you hold one key and press another key three
times, it is important to carefullt follow this
procedure:
1. Holdthedesiredkeyensuringthelightabove
thekeyislit.
2. Presstheotherkeythreetimes,ensuringit
lightsupeachtime.
3. Releasetheheldkeyonlyafterreleasingthe
pressedkeyforthethirdtime.
Except as noted, these functions are available
on all models.
ON/OFF
TheON/OFFmodeallowstheunittobeturned
onandoffviathekeypad.Todothis,holdthekey
forapproximately10secondsuntilthe“F”begins
toash.Releasethekeyandtheunitwillswitch
modes.
Thismodedoesnotdisconnectpowerfromthe
circuitboardsiitisstill“LIVE”.Turningtheunitoff
whileinClean,Ice Maker Off,Forced Harvest,
orForced Defrostwillcancelthosemodes.Ifthis
modeisenteredwhiletheunitisinanice-making
harvestmode,itwillcontinueit’scycleandash
“OFF”untilcompleted.
Showroom Mode
Thismodeisdesignedtoshowunitsinadisplay
environment.Wheninthismodetheonlyfunctions
willbethecontrolsandcabinetlights.The
compressor,fans,etc.willnotoperate.Toenterthis
mode,holdthedownarrowandpresstheLIGHT
buttonthreetimes.Whenentered,theunitwillbeep
onceandthedegreesymbolwillbetoash.When
thedegreesymbolisashingtheunitwillallow
theuseofthecontrolfordemonstrations.Afternot
touchingtheunitforoneminutethedisplaywill
beginto“snake”around.Thisismeanttoalertyou
theunitisinshowroommode.Theunitcanbeleft
inthismodeindenitely.Ifyouagainwanttodemo

7
General Instructions
thecontrol,touchanykeyandthedegreesymbol
willbegintoash
To exit this mode: Ifusingsoftwareversion2.8,
thismodewillexitautomaticallywhentheunitis
unplugged.Ifusongsoftwareversion2.9,thismode
needstobeexitedbythesamekeycombinationas
usedtoenterthemode.
Service Mode
Thismodehas27differentoptionsavailablefor
servicediagnostics.Toenterthemodeholdthe
WARMERkeyandpresstheLIGHTbuttonthree
times.Thedisplaywillshow“0’andtheboardwill
beeponce.WheninthismodetheWARMERand
COLDERkeyswillactasupanddownarrowsto
selectthedesiredoption.TheLIGHTkeyisthe
ENTERkeyandwillenterafunction.Toexitthe
ServiceMode,scrolltooption99andpressthe
LIGHTkey.Afterveminutesofnottouchingany
keysthemodewillalsoexitautomatically.
Blackout / Sabbath Mode
Thismodeallowsforobservationofholidayson
whichlightscannotbeactivated.HoldtheLIGHT
keyfor10secondsuntilthe°Fstartsashing.
Whenreleased,theunitwillbeeponceandthe
displayandcabinetlightwillshutoff.Tocancelthis
mode,holdtheLIGHTkeyagainforabout10-12
seconds.
Clean Cycle
Toentertheselfcleaningcycle,holdtheON/OFF
keyandpresstheLIGHTbuttonthreetimes.The
unitwillbeeponceandthedisplaywillshowCL.
Followthecleaninginstructions.Attheconclusion
ofthismode(1hour),thedisplaywillrevertto
setpointandtheunitwillresumenormaloperation.
Tocancelthismode,turntheunitoffviathe
keypad.
Ice Maker Off Mode (not available)
Force Harvest
Thismodecanbeusedtoforceicetoharvestfrom
themold.Toenterthismode,holstheLIGHTkey
andpresstheUParrowthreetimes.Theunitwill
initiateaniceharvest.Thereisnoaudibletone
whenenteringthismode.
Forced Defrost
Thiswillallowtheunittodefrostquickly.ForRand
WCunits,thisisjustanoffcycle.Forunitswithhot
gasdefrost,theunitwillenterahotgasdefrostper
thespecication.HoldtheLIGHTkeyandpress
ON/OFFthreetimes.Theunitwillbeeponcewhen
enteringthismode.Toexitthismode,eitherdothe
samekeycombinationorturntheunitoffviathe
keypad.
Ice Thickness Adjust
Thiswillallowadditionorsubtractionofuptove
minutesfromtheice-makingcycle.Toenterthis
mode,holdtheUParrowandpresstheDOWN
arrowthreetimes.Theunitwillbeeponceand
displaythecurrenticethickness.Usethearrows
toadjustupordown.PressLIGHTkeywhen
completed.Pleaserefertotheicethicknesssection
ofthemanualtoviewpropercubesizesand
recommendations.
Temporary Shutdown / Office Mode
Insomecasesitmayberequestedfortheunitto
beshutdownforshortperiods,duringmeetings
forexample.TodothisholdtheDOWNarrowand
presstheUParrowthreetimes.Theunitwillbeep
onceanddisplayOFFonthedisplay.Thismode
canbecanceledbyremovingpowerfromthe
unitorturningitonviathedisplay.Themodewill
automaticallybechangedbacktoONafterthree
hours.
Relay Status
Toseewhichrelaysareoperating,holdtheDOWN
arrowandhitON/OFFthreetimes.Theunitwill
scrollthroughallrelaysanddisplaywhether
theyareonoroff.Seespecicunitsectionfor
explanation.

8Service Information
Service Menu
EntertheServiceMenubyholdingUParrowand
pressingLIGHTkeythreetimes.Selectoption1
to27withtheupanddownarrows.Toenterthe
option,pressLIGHTkey.
WhenenteringServiceModeallothermodes
arecancelledandtheunitwillstopoperating.
WhenexitingtheServiceMode,theunitwillbegin
tooperatenormally.However,thefourminute
compressoroffcyclestillapplies.
1 Light all LED segments
ThiswillilluminatealltheLED’sontheboard
toensuretheyworkproperly.
2Thermistor 1 status - Temperature, E1, or
E2
Thiswillshowthepurethermistorreading
withnooffsetstakenintoaccount.When
placedinicewater,thisthermistorshould
read32°Finthismenuoption.(Some
models)
3Error Log
Alistoftheerrorsintheordertheyoccured
willscrollonceonthedisplay.Repeatif
desired.Onceviewed,performOption12to
cleartheerrorsfrommemory.
4Defrost Information
Displaysthenumberofdefroststhathave
occuredinthepast24hours.
5Compressor runtime based on last cycle
Thiswillshowthenumberofminutesthe
compressorhasruninthepriorcycle(or
currentcycleifthecompressorwasrunning
whenServiceModewasentered).
6Defrost length adjust min - 99 minutes
Thelengthofthedefrostcanbeadjusted
upto99minuteslong(foreverysixhours).
Theotherdefrostparameterswillapply.
Lengtheningadefrostmaycausehigher
thannormaltemperaturesintherefrigeration
section.(Somemodels.)
7 Light switch 1 status - 0 to 1
Thiswilltellifthelightshouldturnoffwith
thedoorswitchornot.Atthe“0”readingthe
lightshouldbeoffwiththedoorclosedand
onwiththedooropen.Atthe“1”readingthe
lightalwaysstayson.
8 Display toggle status - 0 or 1
Thiswilltellifthedisplayshouldturnoffwith
thedoorswitchornot.Atthe“0”readingthe
lightshouldbeoffwiththedoorclosedand
onwiththedooropen.Atthe“1’readingthe
lightalwaysstayson.
9 Restore factory defaults
Thiswillrestorethefactorydefaultsetpoint,
defrostandoffsetvalues.
11 Data download
AlongwiththeseparateESPYsoftwareyou
candownloadtherollingdatale.
12 Clear error log
Performthisoperationaftercheckingthe
errors.
13 Clear download memory
Clearstherollingdatale,ifdesired.
14 Model number displayed
Displaysthetwodigitmodelnumberofthe
specicunit
16 Adjust Thermister 2 offset
Thisallowscalibrationofthesensorto
cabinetforabnormaloperations.Byadjusting
thenumbercolderyoucanchangethe
averagecabinettemperaturetoacolder
value.
22 Automatic toggle through relays swith on
and off
Seespecicunitsectionfordescription
23 Defrost interval adjust - 3 to 24 hours
Thiswilladjusttheintervalsbetweendefrosts
from3to24hours.Adjustingfromthefactory
settingsmaycauseundesiredtemperaturein
therefrigeratorsection.
Error Codes
E1 Thermostor1isopen.
E2 Thermistor1isshorted.
E3 Maindoororbottomdrawerisopenlonger
than20minutes.
E4 Compressorhas100%runtimebetweentwo
defrostcycles.Does not show on display -
only in error log.
E5 Thermister1outofrange+10°Fformore
than12hours.
E6 Thermister1outofrange-10°Fformore
than12hours.
E7 Thermister2openorshorted
E8 Thermister3openorshorted.

9
Service Information
E9 Thermister4openorshorted.
E11 EEMemoryerror.
P1 Pumpcircuitopen.
AllerrorsorcombinationshowupasERalternating
withSP.P1willalternatewithSPandICEfor
models67/68.E3andE10bothhaveaudible
alarms.P1doesnothaveanaudiblealarm.
EI151M55GS
Pin 7
C_Fan
Pin 6
Lights
Pin 5 Pin 4
H_H20
Pin 3
C_Pump
Pin 2
R_Valve
Pin 1
BP_Valve
Relay 1 Relay 2 Relay 3 Relay 4 Relay 5 Relay 6 Relay 7
EI151M55GS
Model Thermister
1
Thermister
2
Thermister
3
Thermistor
4
Door
Switch 1
Door
Switch 2
EI151M55GS N/A IB N/A CON N/A P60
24
Quick Reference Card
1. Plug in unit.
2. The display may show a SP or --, either is OK.
3. Install a jumper on J3.
4. Hold down warmer, colder,and light button until
display shows model numberand main board beeps.
5. Use warmer/colder to select new model number.
6. Press and release light key.
7. Wait for display to stop flashing.
8. Remove jumper from board.
9. Unplug unit and wait 5 seconds.
10. Plug unit back in.
* Note: Models 2275DWRWS cannot be programmed on the
same board as the other models.
Échelon Model Selection:
TRAHCECNERE F ERY A L ER
Model Part
Number
PIN 7
C_FAN
PIN 6
LIGHTS PIN 5 PIN 4
H_H2O
PIN 3
C_PUMP
PIN 2
R_VALVE
PIN 1
BP_VALVE
Relay1 Relay2 Relay3 Relay4 Relay5 Relay6Relay7
thgiL57 / 16R5712 Compressor/
Fan
thgiL37 / 17R5112 Compressor/
Fan
thgiL47 / 27CW5112 Compressor/
Fan
1thgiL07
64/78
RRWD5712 Compressor/
Fan Pan Heat Mull Heat
CO2175F CondFan
E FAN Light Compressor Hot Gas Valve DRAIN HEAT IM 1 IM 2
2175RF 65/79 CondFan
E FAN Light Compressor Hot Gas
Valve DRAIN HEAT
CO2175DWR 66/80 CondFan
E FAN Light Compressor Hot Gas Valve MULL HEAT IM 1 IM 2
CLR216067/81 CondFan Compressor
Hot Gas
Valve/ Water
Valve
Circulation
Pump
CLRCO2175 68/82 CondFan Light Compressor
Hot Gas
Valve/Water
Valve
Circulation
Pump Ref Valve Ref Bypass Valve
Compressor/
Fan
thgiL77136VEB5712
2275DWRWS85186CondFan Bottom Light Compressor Top Light Bottom Valve Top Valve
61-2175R 120V
62-2175WC 120V
63-2175BEV 120V
64-CO2175F 120V
65-2175RF 120V
66-CO2175DWR 120V
67-CLR2160 120V
68-CLRCO2175 120V
70-2175DWR 120V
71-2115R 120V
72-2115WC 120V
73-2115R 220V
74-2115WC 220V
75-2175R 220V
76-2175WC 220V
77-2175BEV 220V
78-CO2175 220V
79-2175RF 220V
80-CO2175DWR 220V
81-CLR2160 220V
82-CLRCO2175 220V
85-2275DWRWS 120V*
86-2275DWRWS 220V*
E1 Thermistor #1 open
E2 Thermistor #1 shorted
E3 Door #1 open longer than 20 minutes
E5 Thermistor #1 out of range (+10) for more than 12 hours
E6 Thermistor #1 out of range (-10) for more than 12 hours
E7 Thermistor #2 open or shorted
E8 Thermistor #3 open or shorted
E9 Thermistor #4 open or shorted
E10 Door #2 (drawer) open longer than 20 minutes
E11 EE Memory Error
P1 Pump circuit open due to high water level in ice bin
## Description
l a i t ne r e f f i d1#r o t s imr eh t t su j dA51s t nemgeSDELl l at hg i L1
2 Thermistor #1 status (Temp, E1 or E2) 16 Adjust thermistor #2 offset
tesf fo3#rotsimrehttsujdA71g o l r o r r E3
tesffo4#rotsimrehttsujdA81ofnitsor feD4
5 Compressor runtime (based on last cycle) 19 View thermistor #2 status
6 Defrost Length (adjustment - up to 99 minutes) 20 View thermistor #3 status
7 Light switch status (0 or 1) 21 View thermistor #4 status
8 Display toggle status (0 or 1) 22 Automatic toggle through relays (switch on and off)
)sruoh42ot3(tsuj dalavretnitsor feD32st luafedyrotcaferotseR9
10 Adjust thermistor #1 offset (-10 to +10) 24 Adjust thermistor #2 setpoint
tnioptes3#rotsimrehttsujdA52d a o l nwo da t aD1 1
tnioptes4#rotsimrehttsujdA62golror reraelC21
no i s r e ve r awt f osya l ps i D72y r omemdao l nwodr ae l C31
t i x E9 9ya l ps i dr ebmunl edoM41
Board Components

10 Service Information
25
Échelon Electronic Control Quick Guide
stnemmoCyalpsiDhcuoThcuoTksaT
sdnoceS01dloHffO/nO1 or
or
2 Toggle Lights
Touch once to get into set mode, then touch to adjust.Flashingrorot-pointeStsujdA3
sdnoceS5dloH)1T(erutarepmeTlautcAweiV4 WC will scroll top/middle/bottom temperatures.
4-2srotsimrehTllorcSsdnoceS5dloH)4T-2T(erutarepmeTlautcAweiV5
dloHC-FelggoT6
dloHedoMmoorwohSelggoT7
dloHedoMecivreS8 Use up or down arrows to scroll. Must scroll up to 99
and touch LIGHT to exit.
dloHelggoTyalpsiD9 Display control LEDs while door is closed (glass door
models only)
No display in blackout mode
sdnoceS01dloHedoMtuokcalB01
dloHelcyCnaelC11
dloHedoMffOrekamecI21
dloHtsevraHdecroF41 Audible alert when entering this mode
dloHtsorfeDrotaregirfeRdecroF51 Audible alert when entering this mode dloHtnemtsujdAssenkcihTecI61 Use WARMER/COLDER to scroll.
dloH dloH
)edoMeciffO(nwodtuhSyraropmeT71 Icemaker will automatically turn back on in three hours.
sutatSyaleR81 Relay Number with 1 or 0 to indicate on or off. Relay 3
is off in this example.
dloH)repmujhtiw(rebmuNledoMegnahC91 CLRCO2175 displayed in this example
2275DWRWS Models for Temperature Settings and to View Temperature
stnemmoCyalpsiDhcuoThcuoTksaT
Hold 5 Seconds
Lights (Top and Bottom Drawer)1
2 Adjust Set-point (Top Drawer)
Toggles light from always on (off after 4 hours) and on with drawer open.
After 10 seconds of inactivity, set-point will be stored. Each display will indicate temperature of adjacent drawer. Touch once to get into set mode, then touch to adjust. After setting top temperature, touch LIGHT to enter mode to set bottom temperature.
Flashing3 Adjust Set-point (Bottom Drawer)
4 View Actual Temperature (T1-T2)
Flashing Flashing Flashing
or
orthen (bottom bar on
F flashing)
Flashing
Electronic Control Quick Guide

11
Service Information
Keypad Options
WARNING
Electrocution can cause death or serious
injury. Burns from hot or cold surfaces can
cause serious injuty. Take precautions when
servicing this unit.
 • Disconnectthepowersource.
 • Donotstandinstandingwaterwhen
workingaroundelectricalappliances.
 • Makesurethesurfacesyoutoucharenot
hotorcold.
 • Donottouchabarecircuitboardunless
youarewearingananti-staticwriststrap
thatisgroundedtoanelectricalgroundor
groundedwaterpipe.
 • Handlecircuitboardscarefullyandavoid
touchingcomponents.
When touching key combinations in which
you hold one key and press another key three
times, it is important to carefullt follow this
procedure:
1. Holdthedesiredkeyensuringthelightabove
thekeyislit.
2. Presstheotherkeythreetimes,ensuringit
lightsupeachtime.
3. Releasetheheldkeyonlyafterreleasingthe
pressedkeyforthethirdtime.
Except as noted, these functions are available
on all models.
ON/OFF
TheON/OFFmodeallowstheunittobeturned
onandoffviathekeypad.Todothis,holdthekey
forapproximately10secondsuntilthe“F”begins
toash.Releasethekeyandtheunitwillswitch
modes.
Thismodedoesnotdisconnectpowerfromthe
circuitboardsiitisstill“LIVE”.
Viewing Actual Temperature
Inviewingtemperatureinthesemodesanyoffsets
aretakenintoaccount.Thismeansthatifyou
placeathermistorinaknowntemperature,ice
waterforexample,itmaynotread32°Fthatyou
wouldassume.Ifthecontroloffsetwaspresetat
-3°Fwhileyouplacedthethermistorinanice
bath,theactualthermistorreadingwhebviewing
actualtemperaturewouldread35°F.Intheunitthis
wouldcausethecabinettopushitself3°cooler.to
virepurethermistorreadingsyoumustgointothe
ServiceMenuandchoosethecorrectoption.
Toviewthethermistortemperature,holdthe
WARMERkeyforapproximatelyvesecondsuntil
the“F”ashes.Releaseandthedisplaywillshow
thecorrectedrefrigeratortemperature.ForWine
Coolermodels,thedisplaywillcyclethroughall
threezones.Thesetemperaturesareapproximate
andcalibratedforacabinetinnormalambient
temperatureswithsomeproductload.Checkinga
completelyunloadedcabinetmayresultinother
temperatures.
Changing from Fahrenheit to Celsius
Tochangethedisplayedtemperaturefrom°Fto
°C,holdtheLIGHTkeyandpressCOLDERthree
times.Thiswillchangeallvaluesto°C.Whenthe
keycombinationisacceptedthecontrolwillchange
values.
Showroom Mode
Thismodeisdesignedtoshowunitsinadisplay
environment.Wheninthismodetheonlyfunctions
willbethecontrolsandcabinetlights.The
compressor,fans,etc.willnotoperate.Toenterthis
mode,holdtheCOLDERkeyandpresstheLIGHT
buttonthreetimes.Whenentered,thedegree
symbolwillbetoash.Whenthedegreesymbolis
ashingtheunitwillallowtheuseofthecontrolfor
demonstrations.Afternottouchingtheunitforone
minutethedisplaywillbeginto“snake”around.This
ismeanttoalertyoutheunitisinshowroommode.
Theunitcanbeleftinthismodeindenitely.Ifyou
againwanttodemothecontrol,touchanykeyand
thedegreesymbolwillbegintoash.To exit this
mode: thismodeneedstobeexitedbythesame
keycombinationasusedtoenterthemode.
Service Mode
Thismodehas16differentoptionsavailablefor
servicediagnostics.Toenterthemodeholdthe
WARMERkeyandpresstheLIGHTbuttonthree
times.Thedisplaywillshow“0’.Wheninthismode
theWARMERandCOLDERkeyswillactasup
anddownarrowstoselectthedesiredoption.
TheLIGHTkeyistheENTERkeyandwillentera
function.ToexittheServiceMode,scrolltooption
99andpresstheLIGHTkey.Afterveminutes
ofnottouchinganykeysthemodewillalsoexit
automatically.

12 Service Information
Blackout / Sabbath Mode
Thismodeallowsforobservationofholidayson
whichlightscannotbeactivated.HoldtheLIGHT
keyfor10secondsuntilthe°Fstartsashing.
Whenreleased,theunitwillbeeponceandthe
displayandcabinetlightwillshutoff.Itwillstayoff
for36hours,atwhichtimeitwillautomaticallyturn
backon.Ifdesired,youcanmanuallycancelthis
modebytouchingtheLIGHTkey.Releaseandthe
unitwillautomaticallystartnormaloperation.
Model Number Change
ModelSelection:
1 Ensureboardisnotpluggedin.
2 HolddownON/OFFkeyandpluginunit.
3 ReleaseON/OFFkey.
4 PressandreleaseLIGHTkey.
5 UseWARMER/COLDERtoselectthe
model.
6 PressandreleaseLIGHTkey.
7 Waitfordisplaytostop.
8 Unplugunitandwait5seconds.
9 Plugunitbackin.
Service Menu
EntertheServiceMenubyholdingWARMERand
pressingLIGHTkeythreetimes.Selectoption1to
16withtheWARMERandCOLDERkeys.Toenter
theoption,pressLIGHTkey.
WhenenteringServiceModeallothermodes
arecancelledandtheunitwillstopoperating.
WhenexitingtheServiceMode,theunitwillbegin
tooperatenormally.However,thefourminute
compressoroffcyclestillapplies.
1 Light all LED segments
ThiswillilluminatealltheLED’sontheboard
toensuretheyworkproperly.
2Thermistor 1 status - Temperature, E1, or
E2
Thiswillshowthepurethermistorreading
withnooffsetstakenintoaccount.When
placedinicewater,thisthermistorshould
read32°Finthismenuoption.
3Error Log
Alistoftheerrorsintheordertheyoccured
willscrollonceonthedisplay.Repeatif
desired.Onceviewed,performOption12to
cleartheerrorsfrommemory.
4Defrost Information
Displaysthenumberofdefroststhathave
occuredinthepast24hours.
5Compressor runtime based on last cycle
Thiswillshowthenumberofminutesthe
compressorhasruninthepriorcycle(or
currentcycleifthecompressorwasrunning
whenServiceModewasentered).
6Defrost length adjust min - 99 minutes
Thelengthofthedefrostcanbeadjusted
upto99minuteslong(foreverysixhours).
Theotherdefrostparameterswillapply.
Lengtheningadefrostmaycausehigher
thannormaltemperaturesintherefrigeration
section.
7 Light switch 1 status - 0 to 1
Thiswilltellifthelightshouldturnoffwith
thedoorswitchornot.Atthe“0”readingthe
lightshouldbeoffwiththedoorclosedand
onwiththedooropen.Atthe“1”readingthe
lightalwaysstayson.
8 Display toggle status - 0 or 1
Thiswilltellifthedisplayshouldturnoffwith
thedoorswitchornot.Atthe“0”readingthe
lightshouldbeoffwiththedoorclosedand
onwiththedooropen.Atthe“1’readingthe
lightalwaysstayson.
9 Restore factory defaults
Thiswillrestorethefactorydefaultsetpoint,
defrostandoffsetvalues.
10 Adjust Thermistor 1 offset - 10 to +10°F
Thisallowscalibrationofthesensortothe
cabinetforabnormaloperations.Byadjusting
thenumbercolderyoucanchangethe
averagetemperaturetoacoldervalue.
11 Data download
AlongwiththeseparateESPYsoftwareyou
candownloadtherollingdatale.
12 Clear error log
Performthisoperationaftercheckingthe
errors.
13 Clear download memory
Clearstherollingdatale,ifdesired.
14 Model number displayed
Displaysthetwodigitmodelnumberofthe
specicunit
15 Adjust Thermister 1 differential
Thisnumbershouldnotbeadjusted.
16 Software number
Thiswillshowthesoftwareontheboard.

13
Service Information
Error Codes
E1 Thermostor1isopen.
E2 Thermistor1isshorted.
E3 Maindoororbottomdrawerisopenlongerthan20minutes.
E4 Compressorhas100%runtimebetweentwodefrostcycles.
E5 Thermister1outofrange+10°Fformorethan12hours.
E6 Thermister1outofrange-10°Fformorethan12hours.
All errors show up on display alternating between SP and ER#.
Electronic Control Quick Guide
28
Error Codes
E1 Thermistor 1 is open.
E2 Thermistor 1 is shorted.
E3 Main door or bottom drawer is open longer than 20
minutes.
E4 Compressor had 100% runtime between two defrost
cycles.
E5 Thermistor 1 out of range + 10°F for more than 12
hours.
E6 Thermistor 1 out of range -10°F for more than 12
hours.
All errors show up on display alternating between
SP and ER#.
Origins Electronic Control Quick Guide
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14 Service Information
Thermistor Types
Type 1 (Black)
Resistanceat77°F=10,000ohms±5%
Operatingrangeis185,000to650ohms.
Resistancegoesdownastemperatureincreases.
Type1doesnotneedtobecalibratedandcanbe
changedwithoutchangingotherwiresorboard.
Type 2 (White)
Resistanceat77°F=5,000ohms±5%
Operatingrangeis180,000to550ohms.
Resistancegoesdownastemperatureincreases.
Type2doesnotneedtobecalibratedandcanbe
changedwithoutchangingotherwiresorboard.
36
Model CLR2160
Operation
Figure 1
HIGH PRESSURE
LOWPRESSURE
TRANSITIONAL PRESSURE
IN CAPILLARY TUBE
H
L
C
L
L
C
C
C
C
C
L
L
H
H
C
L
ICEMAKER EVAPORATOR
2276
R4: WATER
SUPPLY
R5: WATER
CIRCULATION PUMP
R4: HOT GAS
BYPASS
VALVE
R1: CONDENSER
FA N
CONDENSER
R3: COMPRESSOR
RELAY R1 R3 R4 R5
FUNCTION FAN
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON/OFF
ON*
ON
OFF
OFF
ON/OFF
OFF
COMP CIRC PUMP
HOT GAS /
WATER IN
Mode 1:
Ice Making
Mode 2:
Ice Harvest
Mode 3:
Off
Mode 4:
Cleaning
Mode 5:
Water Fill &
Initial Start-Up
* Normal Start-Up lasts 3 minutes
Note: R2, R6 and R7 not used
29
Thermistor Types
Type 1 (Black)
Resistance at 77°F = 10,000 Ohms ± 5%
Operating range is 185,000 to 650 Ohms. Resistance goes
down as temperature increases. Type 1 does not need to
be calibrated and can be changed without changing other
wires or board.
Type 2 (White)
Resistance at 77°F = 5,000 Ohms ± 5%
Operating range is 180,000 to 550 Ohms. Resistance goes
down as temperature increases. Type 2 does not need to
be calibrated and can be changed without changing other
wires or board.
Refrigeration System Diagnosis Guide
System
Condition
Suction
Pressure
Suction
Line
Compressor
Discharge
Condenser Capillary
Tube
Evaporator Wattage
Normal Normal Slightly below
room
temperature
Very hot Very hot Warm Cold Normal
Overcharge Higher than
normal
Very cold -
may frost
heavily
Slightly warm
to hot
Hot to warm Cool Cold Higher than
normal
Undercharge Lower than
normal
Warm -
near room
temperature
Hot Warm Warm Extremely cold
near inlet -
outlet below
room
temperature
Lower than
normal
Partial
Restriction
Somewhat
lower than
normal -
in vacuum
Warm -
near room
temperature
Very hot Top passes
warm -
lower passes
cool (near room
temperature
due to liquid
Room
temperature
(cool) or colder
Extremely cold
near inlet -
outlet below
room
temperature
backing up
Lower than
normal
Complete
Restriction
In deep
vacuum
Room
temperature
(cool)
Room
temperature
(cool)
Room
temperature
(cool)
Room
temperature
(cool)
No
refrigeration
Lower than
normal
No Gas 0 PSIG
to 25"
Room
temperature
(cool)
Cool to hot Room
temperature
(cool)
Room
temperature
(cool)
No
refrigeration
Lower than
normal

15
Service Information
Filter-Drier Installation
Anytimethesealedsystemisopenedandthe
refrigerantchargeisremoved,theliquidlinelter-
driermustbereplacedandthesystemthoroughly
evacuatedbeforerecharging.
CAUTION
DO NOT unbraze the old filter-drier from the
system. This will vaporize and drive moisture
from the desiccant back into the system. The
old filter-drier should be cut out of the system.
CAUTION
Use only a 15 gram XH9 liquid line filter-drier
(part number 5303305677) when servicing
refrigerator and freezer systems. This filter-
drier is compatible with either R-12 or R-134a
refrigerant.
1.  Disconnectunitfromsourceofpower.
2.  RecoverrefrigerantbyusinganEPA
approvedrecoverysystem.
3.  Usinga3corneredle,scoreagroove
aroundcapillarytubeasclosetooldlter-
drieraspossible.Breakcapillarytubealong
scoremarkfromlter-drier.
4.  Cutcondenseroutlettubeatlter-drier.
Discardlter-drier.
5.  Thoroughlycleancondenseroutlettubeand
capillarytube.
6.  Placeinletconnectionoflter-drierover
condensertubeapproximately¼”andsolder.
7.  Insertcapillarytubeinputendintolter-drier
outlet.Donotallowtubetobottomagainst
screen.Soldercarefullysothatsolderdoes
notplugcapillarytube.
8.  Installprocesstubeadaptortolter-drier.
9.  Evacuateandchargesystemusingthe
recommendedproceduredescribedunder
EvacuatingandRecharging.
10. Reassembleunit.
Evacuating and Recharging
CAUTION
Check the serial plate for the correct
refrigerant type. It is extremely important to
verify the type of refrigerant in the system
before starting any sealed system repairs.
With the possible exception of the vacuum
pump, all service equipment that comes in
contact with R-134a during evacuation and
recharging must be dedicated. Accordingly,
R-134a will require a dedicated charging
cylinder, manifold gauge set, process tube
adaptors, and hoses. Any residual mineral
oil on other tools (tubing cutter, etc.) must
be thoroughly cleaned off before using
on R-134a/Ester oil systems. It will be
necessary to check with the manufacturer
of your vacuum pump for refrigerant and oil
compatibility issues.
If you use a vacuum pump with mineral oil to
evacuate an R-134a system, it is ABSOLUTELY
ESSENTIAL to have a shut-off valve between
the pump and your manifold gauge set as
shown on page 18. The hand valve must be
closed during all times when the vacuum
pump is not operating. This will prevent the
migration of mineral oil vapor into the R134a/
Ester oil system. If the vacuum pump should
stop during evacuation for any reason, the
hand pump shut-off valve must be closed
immediately.
Insure that your refrigeration hoses are
specified for use with R-134a refrigerant.
Research has shown that compounds in
standard refrigeration hoses may enter
sealed systems and ultimately restrict the cap
tube in an R-134a system.

16 Service Information
Toachievetherequiredlevelsofevacuation,a
properlymaintainedtwostagevacuumpumpin
goodconditionisrequired.Itisabsolutelyessential
tomaintainyourvacuumpumpaccordingtothe
manufacturer’sinstructionsincludingrequired
oilchangesattherecommendedintervals.
Vacuumpumpoilshouldalwaysbechangedafter
evacuatingacontaminatedsystem.
Vacuumpumpperformanceshouldbechecked
periodicallywithamicrongauge.
1.  Makecertainthatchargingcylindervalve,
handshut-offvalve,andmanifoldgauge
valvesareclosed.
2.  Startvacuumpump.
3.  Openhandshut-offvalveandslowly
openbothmanifoldvalves,turning
counterclockwise,fortwofullrotations.
WARNING
R-134a systems are particularly susceptible
to moisture contamination which can only
be prevented by evacuating the system for a
minimum of 30 minutes to attain a minimum
29.9 inch (500 micron or lower) vacuum.
4.  Operatethevacuumpumpforaminimum
of30minutestoaminimumof29.9”(500
micron)vacuum.
NOTE
OnproductswithLowsideleaksyoumustheat
thecrankcaseareaofthecompressorthough
outthe30minutesyouarerunningyourvacuum
pumptopullavacuumonthesystem.Every4
to5minuteswhileyouarerunningyourvacuum
pumpandheatingthecrankcaseareashake
thecompressor.Byheatingthecrank-caseyou
areheatingtheoilinthecompressor.Thiswill
drivethemoistureoutoftheoil.Byshakingthe
compressorthiswillallowthemoisturetocometo
thetopoftheoilfastersothevacuumpumpcan
removethemoisturefromthesystem.
CAUTION
If high vacuum equipment is used, just
crack both manifold valves for a few minutes
and then open slowly for the two full turns
counterclockwise. This will prevent the
compressor oil from foaming and being drawn
into the vacuum pump.
Evacuating SystemEquipment Needed for Evacuation &
Recharging:
•  Heatedchargingcylinder
•  Standard3-portmanifoldgaugeset:
 -4charginghoses
 -Teettingwithvalvecorestemremoved
(RobinairNo.40396)
 -Handshut-offvalve(RobinairNo.40380)
•  Twostagevacuumpump
•  Processtubeadapterkit(RobinairNo.
12458)
•  Tubingcutter
•  Pinch-offtoolcapableofmakingleakproof
seal
•  Completebrazingtorchset
•  Small3-cornerle
•  GritclothorScotch-Brite
•  45%silversolderandux
•  HeatGun
Installing Evacuation and Recharging
Equipment
1.  Disconnectrefrigeratorfromelectricalsupply.
2.  Ifcompressorwasreplaced,installcorrect
sizedprocesstubeadaptoronprocesstube.
Ifcompressorwasnotreplaced,cutprocess
tubewithtubingcutterleavingasmuchtube
aspossibleandinstallcorrectsizeprocess
tubeadaptor.
3.  Installcorrectsizedprocesstubeadaptoron
high-sideprocesstube.
4.  Attachrefrigerationservicegaugemanifold
tosysteminfollowingorder:
 • Low-side(compoundgauge)hosetosuction
sideprocesstubeadaptor.
 • High-side(pressuregauge)hosetohigh-side
processtubeadaptor.
 • Centerportmanifoldhosebeforehandshut-
offvalvetochargingcylinder.
 • Centerportmanifoldhoseafterhandshut-off
valvetovacuumpump.

17
Service Information
NOTE
Processvalvesarenottobeleftonthetubingin
anyapplication,exceptthevalveonEMAService
drierpart#5303918288.
5.  Closehandshut-offvalvetovacuumpump.
Watchcompoundgaugeforseveralminutes.
Ifreadingrises,thereisaleakinthesystem,
gotostep6.Ifnoleakisindicated,stop
vacuumpump.Systemisnowreadyfor
charging.
6.  Ifaleakisindicated,stopvacuumpumpand
introduceasmallchargeofrefrigerantinto
systembycrackingvalveonbottomof
chargingcylinderuntilsystemispressurized
to40or50lbspsig.
7.  Leaktestlow-side.Closecompoundgauge.
Runcompressorforafewminutesandleak
testhigh-side.Whenleakisfound,recapture
refrigerantusingEPAapprovedrecovery
systemRepairandgobacktostep1.
CAUTION
Check the serial plate for the correct
refrigerant type. It is extremely important to
verify the type of refrigerant in the system
before starting any sealed system repairs.
After charging the system with liquid be
certain to wait at least 5 minutes before
starting the compressor to give the refrigerant
a chance to disperse throughout the system.
Otherwise the compressor could be damaged
by attempting to pump excessive quantities
of liquid.
Preparing The Charging Cylinder:
1.  Makecertainthathandshut-offvalveto
vacuumpumpisclosed.
2.  Closehigh-sidemanifoldgaugevalve.
3.  Setchargingcylinderscaletopressure
indicatedoncylinderpressuregauge.
4.  Observerefrigerantlevelinsightglass.
Subtractamounttobechargedintosystem
andnoteshutoffpoint.
5.  Openchargingcylindervalveslowlyand
allowproperchargetoentersystem.
6.  Assoonasrefrigerantinsightglasshas
gonedowntopredeterminedlevel,close
chargingcylindervalve.
7.  Allowsystemtositforveminutes.
8.  Turnonrefrigeratorcompressor.Run
compressorforafewminutesandmonitor
systempressures.
9.  Whensatisedthattheunitisoperating
correctly,clampthehigh-sideprocesstube
withthepinch-offtoolwhiletheunitisstill
running.
10. Slowlyopenthehigh-sidemanifoldgauge
valvetoallowthecompressortoremoveany
refrigeranttrappedinthehigh-sidehoseand
theprocesstting.
11. Closebothofthemanifoldgaugevalves.If
thehigh-sidegaugereadingrises,thepinch-
offmustbecorrectedbeforeproceeding.
12. Removethehigh-sideprocesstubeadaptor
andsoldertheprocesstubeclosed.
13. Clampthelow-sideprocesstubewiththe
pinch-offtoolwhiletheunitisrunning.
Removethelow-sideprocesstubeadaptor
andsoldertheprocesstubeclosed.
14. Checktheprocesstubesforrefrigerantleaks.
WARNING
Disconnect the charging cylinder heater at
this time to prevent the cylinder pressure from
exceeding its maximum limits.
Final Leak Test
1.  WiththerefrigeratorturnedOFFleaktestall
low-sidesystemcomponents.
2.  TurntheunitONandrununtilthecondenser
iswarm.Leaktestthehigh-sidesystem
components.
Charging The System

18 Service Information
Hot Tube
Evaporator
Condenser
Compressor
2 Stage
Vacuum Pump
Heated
Charging
Cylinder
Process Tube
Adapters
Filter Drier
Pressure
Gauge
Compound
Gauge
Gauge
Manifold T-Fitting
Evacuating and Recharging Connections

19
Service Information
Verify Refrigerant Type In The
System
Forexample,hosesthatwereusedfora
refrigerationsystemoperatingonR-12maycontain
smallquantitiesofmineraloilwhichcanblockthe
capillarytubeinasystemoperatingonR-134a.As
littleasonemilligrammaybesufcienttocausea
blockage.Inaddition,sealedsystemcomponents
thathavebeenusedwithCFCsystemsmustnot
beusedwithR-134asystems.Thesecomponents
maycontainresidualamountsofrefrigerantandoil
whichcoulddamageanR-134asystem.
NOTICE
Instructionsgivenherearefurnishedasaguide.
Personsattemptingtousetheseinstructionsto
makerepairstothesealedrefrigerationsystem
shouldhaveaworkingknowledgeofrefrigeration
andprevioustrainingonsealedsystemrepair.
CAUTION
R-134a and R-12 are completely incompatible.
Before starting any sealed system repair, it is
extremely important to check serial plate of
product to verify the type of refrigerant in the
system.
Dedicated Equipment
R-134amustnotbemixedwithothertypes
ofrefrigerants.R-134amustberecoveredin
dedicatedandproperlyidentiedrecoverybags
andtanks.
Itwillbenecessarytocheckwiththemanufacturer
ofyourrecoveryequipmenttodetermine
R-134acompatibility.Somerecoveryequipment
manufacturershavechangeoverinstructions
forswitchingbetweenrefrigeranttypes.Protect
yourselfandyourequipmentbyfollowingall
manufacturerguidelines.
Also,ensurethatyourrefrigerationhoses
arespeciedforusewithR-134arefrigerant.
Researchhasshownthatcompoundsinstandard
refrigerationhosesmayentersealedsystems
andultimatelyrestrictthecaptubeinanR-134a
system.
R-134a Refrigeration Systems
Thesealedrefrigerationsystemwillconsistofthe
samebasiccomponentsbeingutilizedintheR-12
systems.
Thereisa10%to15%dischargepressure
increaseusingR-134a,witha5%to10%decrease
insuctionpressurewhencomparedtothesame
productwithanR-12systemoperatingat90°F
(32°C)ambienttemperatureconditions.Lower
suctionpressuresresultfromthelowerdensityof
R-134arefrigerantwhicheffectsrefrigerantow
rate.R-134asystemscommonlyoperateina1”-2”
vacuumonthesuctionside.
ProductsusingR-134arefrigerantwillgenerally
havealongercapillarytubetomaintainasimilar
owrateandsomemodelswillhavealarger
condensertoreducethedischargepressuresand
lowerstart-upsoundtransmission.
Miscibility of R-134a and
Ester Oil
AspecialsyntheticoilknownasEsteroilisused
asalubricantinrefrigerationsystemsoperating
onR-134a.Esteroilsareproducedfromalcohols
andfattyacidsandareavailableinseveral
differentvariants.Esteroilshaveapleasantaroma
reminiscentoffruit.
Esteroilsgenerallyincludevarioustypesof
additivesforimprovingcertainpropertiessuch
asviscosity,temperaturesensitivity,etc.These
additivesareoftenaggressive,andskincontact
withEsteroilsshouldthereforebeavoided.
Oneofthemostimportantrequirementsmade
onarefrigerantsystemisthattheoilmixwiththe
refrigerant.Sincemineraloilandordinarysynthetic
oilDONOTmixwithR-134a,Esteroilisusedfor
lubrication.EsteroildissolvesinR-134a.
Esteroilisbrokendownbychlorineandcannot
beusedwithR-12(R-12containschlorine)orany
othercompoundcontainingchlorine.Therefore,
R-134arefrigerationsystemshavevirtually
notoleranceforchlorinemoleculesfromCFC
refrigerants(R-134aisanHFCandcontainsno
chlorine).
CAUTION
During R-134a service, it is extremely
important to avoid using equipment that may
contain residual amounts of mineral oil, CFC’s
or HCFC’s which could enter and contaminate
the sealed system.

20 Service Information
Attheearlieststageofdevelopmentworkon
R-134a,testswerecarriedoutonadifferenttypeof
syntheticoilknownasPoly-AlkalineGlycol(PAG).
Thisoilisalsousedincertainairconditioning
systemsforcars.PAGandEsteroilDONOTmix
withoneanother.Serviceequipmentusedfor
R-134a/Esteroilmustnotcomeintocontactwith
PAG.
Water In The Refrigeration
System
Eveninverysmallquantities,waterinany
refrigerationsystemcancausethefollowing
problems:
•Iceplugsincapillarytubes.
•Copperplatingincompressor.
•Reactionswithorganicmaterialsinsystems.
•Corrosionofmetals.
R-134aandEsteroilwillaggravatetheproblem
ofwaterintherefrigerationsystem.Esteroilmay
reactwithwatervaporandishydroscopic(itwill
absorbwaterifitcomesincontactwithhumidair).
WaterisalsomoresolubleinR-134athanR-12.
Tominimizethewatercontentwheneverservice
workisperformed,therefrigerationsystemshould
alwaysbethoroughlyevacuatedthroughprocess
tubeadaptorsonboththehighandlowsidesof
thesystem.Evacuationmustbeforaminimum
of30minutestoatleasta29.9inch(500micron)
vacuum.
Toachievetherequired29.9inch(500micron)
vacuum,aproperlymaintainedtwo-stagevacuum
pumpingoodconditionisrequired.Atwostage
pumpcanreachadeepervacuumthanasingle
stagebecausetheexhaustfromtherstpumping
stageisdischargedintothesecondpumpingstage.
Thismeansthesecondstagebeginspumpingata
lowerpressuresoalowerultimatevacuumcanbe
achieved(See2-StageVacuumPump,FigureE3).
VACUUM CHART
Vacuum
Inches Hg. Microns Boiling Point of Water °F
28.940 25000 77.9
29.530 10000 52.0
29.832 4600 32.0
29.882 1000 1.0
29.901 500 -11.2
29.915 150 -32.8
29.917 100 -38.2
29.919 50 -49.0
Vacuum Pump Maintenance
Itisabsolutelyessentialtomaintainyourvacuum
pumpaccordingtothemanufacturer’sinstructions
includingrequiredoilchangesattherecommended
intervals.Vacuumpumpoilshouldalwaysbe
changedafterevacuatingacontaminatedsystem.
Vacuumpumpperformanceshouldbechecked
periodicallywithamicrongauge.
Vacuumpumpsuppliersmayormaynot
recommendchangingthevacuumpumpoiltothe
sametypethat’sinthesystembeingevacuated.
Somemanufacturersmayrecommendavacuum
pumpthat’sdedicatedtoR-134asystems.
Robinairhasstatedthattheircurrentand
discontinuedvacuumpumpmodels,usingmineral
oilcurrentlyspeciedforuseintheirvacuum
pumps,canbeusedtoevacuateR-134a/Esteroil
systems.Robinairalsostatesthatitisacceptable
toalternatebetweenevacuatingR-12/mineraloil
andR-134a/Esteroilsystemswithoutadversely
effectingthevacuumpump’sperformance.
Forotherbrandsofvacuumpumps,checkwiththe
manufacturerforrestrictionsandguidelineswhen
usingwithR-134a.
2-Stage Vacuum Pump
Figure E3