U-Line U-BI98B-00A Service Manual
U-Line Corporation
www.U-LineService.com
Phone (414) 354-0300 • FAX (414) 354-7905
Service & Parts Tech Lines Phone (800) 779-2547 • FAX (414) 354-5696
U-Line Corporation
PO Box 245040
Milwaukee, WI 53224-9540
U-Line Corporation
8900 North 55th Street
Milwaukee, WI 53223
SERVICE AND PARTS
MANUAL
Models
95 Icemaker
98 Icemaker
BI15 Icemaker
15R
15 Wine Captain
Combo 75 Frost Free
Combo 75A
75AD
75 Wine Captain
75 Freezer
75R
75RF
75 Bev
Combo 29 Frost Free
Combo 29A
29AD
29R
29 Wine Captain
SP18
R
R
C
E
D
A
I
N
M
T
A
H
S
E
U
Three generations of pride and quality manufacturing and design improvements are built
into all U-Line products.
This manual contains specific instructions for servicing the entire line of U-Line Products
which includes these models:
INTRODUCTION
Service and Parts Manual
2
95 Icemaker
98 Icemaker
BI15 Icemaker
15R
15 Wine Captain
Combo 75 Frost Free
Combo 75A
75AD
75R
75 Wine Captain
75 Freezer
75RF
75 Bev
Combo 29 Frost Free
Combo 29A
29AD
29R
29 Wine Captain
SP18
This Service Manual has been written to cover product manufactured with HFC-134a.
Units previously manufactured with CFC-12 will, however, be in service for many years.
SERVICING CFC-12 SYSTEMS
U-Line Corporation has not approved the use of any “drop in” replacements for CFC-12.
U-Line has also not approved the process of converting a CFC-12 system to any other
type of refrigerant.
POTENTIAL PROBLEMS WITH HFC-134A
HFC-134A compressors will be received with a synthetic based ester oil charge. The
hygroscopic (water attraction) property of ester oil is many times greater than that of
the mineral oils previously used with CFC-12. High system moisture causes the formation of acids and alcohol which can damage the compressor. Systems should not be left
open for more than fifteen (15) minutes at any time as humidity from the air will enter
system. To assure system dehydration, the system should be pulled down to 100
microns and vacuum pump oil (mineral oil) must not be allowed to enter then system.
Cleanliness of the system will be extremely important. The presence of residues (chlorinated or greasy residues, mineral oil, or impurities) can lead to capillary tube restrictions, oil return problems and compressor damage. Flux must not
be used on brazed
joints.
3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Warranty Claims Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Guide for Screening Customer Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Refrigeration Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Normal Vapor/Compression Cycle Refrigeration . . . . . . . . . . . . . . . . . . . . . .11
U-Line Frost Free Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Compressor/Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Compressor Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Refrigeration System Diagnosis Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Ice Maker Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Ice Maker Operating Cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Cycle Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Freeze Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Harvest-1 Cycle (Hold switch in normal position) . . . . . . . . . . . . . . . . . . .16
Harvest-2 Cycle (Hold switch in switched position) . . . . . . . . . . . . . . . . . .17
Water Fill Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Temperature Control Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Limit Switch Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Ice Maker Diagnosis Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Frost Free Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Redesign Differentiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Typical Frost Free Airflow Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Combo 75FF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Combo 29FF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
75RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Parts Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Model 402 Ice Maker Assembly Parts Breakdown . . . . . . . . . . . . . . . . . . . . .40
Parts Breakdown by Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
How to Order Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Fax Parts Order Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
TABLE OF CONTENTS
Service and Parts Manual
4
Warranty Statement
On 11-1-98, U-Line Corporation modified the warranty provided with our units. We have
significantly improved the coverage of the sealed system in years two through five of the
unit’s life. The new warranty covers parts and labor for one year from the date of purchase. In years two through five, from the date of purchase, the warranty covers parts
and labor for the entire sealed system. The sealed system consists of the compressor,
condenser, evaporator, heat exchanger, dryer, hot gas bypass-valve and all connecting
tubing.
This decision reflects our continuing commitment to strive to maintain the leadership
position within the under counter refrigeration and ice making industry whether that be
through design, product innovation, or enhanced consumer warranties. This decision
reinforces the confidence that U-Line has in the performance and reliability of our products.
Our previous warranty covered parts and labor for one year from the date of purchase
plus four additional years for the compressor, part only.
The new, modified warranty applies
only to units shipped after 11-1-98. All units
shipped before 11-1-98 have the previous warranty.
PRODUCTS SHIPPED BEFORE 11-1-98 - Warranty covers parts and labor for one year
from the date of purchase, plus four additional years for the compressor (part only).
PRODUCTS SHIPPED AFTER 11-1-98 - Warranty covers parts and labor for one year
from the date of purchase and covers parts and labor for the entire sealed system for
five years.
DETERMINING SHIP DATES
In order to assure that U-Line is Y2K compliant, we have recently completed a major
computer system modification. The new computer system has lead to changes in the
way we operate in most areas of the company. You’ll soon notice that our packing lists
are different, our invoices are different, our checks are different, and more. The change
that will impact you the most is the change in serial numbers.
With the new computer system, our serial number format has changed. There are some
definite advantages that go with the new format, such as being able to tell the month
and year in which the unit was produced.
The new serial number format breaks the number down into four segments. A typical
serial number is 047413-06-0100. The first segment 04, represents the year that the
unit was made. The second segment 7413, represents the shop order number. This
can be a three or four digit number. Order number 7413 is assigned for Model
WH95TP units. The third segment – 06 represents the month that the unit was made.
The forth segment – 0100 represents a sequence of numbers that is used internally at
U-Line Corporation.
5
U-Line Corporation warrants each U-Line product to be free from defects in materials
and workmanship for a period of one year from the date of purchase; and warrants the
sealed system (consisting of the compressor, the condenser, the evaporator, the hot gas
bypass valve, the dryer and the connecting tubing) in each U-Line product to be free from
defects in materials and workmanship for a period of five years from the date of purchase. During the initial one-year warranty period for all U-Line products U-Line shall: (1)
at U-Line’s option, repair any product or replace any part of a product that breaches this
warranty; and (2) for all Marine, RV and Domestic U-Line products sold and serviced in
the United States (including Alaska and Hawaii)and Canada, U-Line shall cover the labor
costs incurred in connection with the replacement of any defective part. During years
two through five of the warranty period for the sealed system, U-Line shall:. (1) repair
or replace any part of the sealed system that breaches this warranty; and (2) for all
Marine, RV and Domestic U-Line products sold and serviced in the United States (including Alaska and Hawaii)and Canada, U-Line shall cover the labor costs incurred in connection with the replacement of any defective part of the sealed system. All other charges,
including transportation charges for replacements under this warranty and labor costs
not specifically covered by this warranty, shall be borne by you. This warranty is extended only to the original purchaser of the U-Line product. The Product Registration Card
included with the product should be promptly completed by you and mailed back to
U-Line or you can register on-line at www.U-LineService.com.
The following are excluded from this limited warranty: installation charges; damages
caused by disasters or acts of God, such as fire, floods, wind and lightening; damages
incurred or resulting from shipping, improper installation, unauthorized modification, or
misuse/abuse of the product; customer education calls; food loss/spoilage; door and
water level adjustments (except during the first 90 days from the date of purchase);
defrosting the product; adjusting the controls; door reversal; or cleaning the condenser.
If a product defect is discovered during the applicable warranty period, you must promptly notify either the dealer from whom you purchased the product or U-Line at P.O. Box
23220, Milwaukee, Wisconsin 53223 or at 414-354-0300. In no event shall such
notification be received later than 30 days after the expiration of the applicable warranty
period. U-Line may require that defective parts be returned, at your expense, to U-Line’s
factory in Milwaukee, Wisconsin, for inspection. Any action by you for breach of warranty must be commenced within one year after the expiration of the applicable warranty
period.
This limited warranty is in lieu of any other warranty, express or implied, including, but
not limited to any implied warranty of merchantability or fitness for a particular purpose; provided however, that to the extent required by law, implied warranties are
included but do not extend beyond the duration of the express warranty first set forth
above. U-Line’s sole liability and your exclusive remedy under this warranty is set forth
in the initial paragraph above. U-Line shall have no liability whatsoever for any incidental, consequential or special damages arising from the sale, use or installation of the
product or from any other cause whatsoever, whether based on warranty (express or
implied) or otherwise based on contract, tort or any other theory of liability.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages, so the above limitations may
not apply to you. This warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.
LIMITED WARRANTY
Service and Parts Manual
6
This is the safety alert symbol. It is used to alert you to potential personal
injury hazards. Obey all safety messages that follow this symbol to avoid
possible injury or death.
!
DANGER indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
DANGER
!!
WARNING indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
! !
CAUTION indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury.
!
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.
IMPORTANT indicates installation, operation or maintenance information
which is important but not hazard-related.
7
Do not attempt to service or repair the unit until you have read the entire procedure.
Safety items throughout this manual are labeled with Warning or Caution.
SAFETY PRECAUTIONS
Risk of child entrapment. Before you throw away an old refrigerator or
freezer: Take off the doors, leave shelves in place so that children may not
easily climb inside.
DANGER
!!
• Never attempt to repair or perform maintenance on the unit
until the electricity has been disconnected.
•Altering, cutting of power cord, removal of power cord, removal
of power plug, or direct wiring can cause serious injury, fire
and/or loss of property and/or life and will void the warranty.
DANGER
!!
• Do not lift unit by door handle.
•Never use an ice pick or other sharp instrument to help speed up defrosting. These instruments can puncture the inner lining or damage the cooling unit.
• Failure to clean the condenser every three months can cause the unit to
malfunction. This could void the warranty.
• Never install the unit behind closed doors. Be sure front grille is free of
obstruction. Obstructing free air flow can cause the unit to malfunction,
and may void the warranty.
Service and Parts Manual
8
When submitting claims for warranty payment, please follow these guidelines.
You can use any form you would normally use to bill your customer (your own computer
generated form, Narda, USA, etc.).
The model and serial number
MUST be on the claims. Claims will not be paid without a
model and serial number.
If you work on more than one unit per service call please submit a separate claim for
each unit.
We track all defects through warranty claims, so please be specific on what the repair
was. If it is a system leak, please specify where the leak was.
Please be sure the claim is legible. If the claim form cannot be read, it will be returned,
unpaid.
U-Line will
not cover part or labor claims for the replacement of a complete ice maker
assembly. All ice maker parts are available as replacement parts and are stocked in our
inventory.
Remember: we do not pay customer education calls. Door and water level
adjustments are 90 day warranties only.
If you are changing out a unit please supply the model and serial number of both units
(the unit being replaced and the new unit) and the R.A. number.
If a copy of the Proof of Purchase/Install is not available at the site, the technician
should record he following information on the Labor Invoice:
• The name of the selling Dealer
• The date of purchase/installation
• The Order or Invoice number (if available)
• The type of document the technician saw i.e. Store Receipt, Closing Papers,
Sign-Off of Building Permit, Final Walk Through, etc.
At U-Line, parts and labor claims are paid separately. Included in labor would be freon
and recovery charges, all other parts are handled by the parts department. We require
that some parts be returned to us, so we may return them to our vendor. It will be
noted on your packing list if we require you to return the part. If a part is to be returned
please include a copy of the packing list and a copy of your claim. If the part was purchased at one of our part distributors, you must handle the part warranty with that company. For labor payment please send a readable copy of your claim to U-Line
Corporation, P.O. Box 245040, Milwaukee WI, 53224-9540, for warranty payment.
WARRANTY CLAIMS PROCEDURE
9
U-line’s warranty does not cover customer education calls. It has been reported that as
high as 50% of all service calls performed, are customer education calls.
The following guide has been developed to help screen calls on the most common customer education issues. It can be used by persons scheduling service calls.
The unit is not cold enough!
Questions to ask before scheduling a service call —
• Are you familiar with the factory specifications for this unit? (many factors can cause
these figures to vary. Ambient temperature, application, amount of use etc.)
Model Numbers Approximate Temperatures
15WC, 29WC, 75WC 60° top rack /55° middle/ 45° bottom
15R, 29R, 75R 38°
75AD, 75, 29AD 38° fresh food, 15° freezer
C75A, C75FF, C29A, C29FF 38° fresh food
75 Bev 38° glass shelves, 45° wine racks
• Is the door sealing properly? If the door is not sealed properly, it allows heat into the
unit. U-Line's warranty is 90 days for door adjustments.
• Is the condenser clean? U-Line's warranty does not cover cleaning the condenser.
• Is the unit behind closed doors? The unit must have free air flow to the front grille.
• Did you try turning the temperature control colder? Turning the control knob clockwise is colder. Be sure to allow 24 hrs. between temperature control adjustments.
•
For model 29AD only. Is the defrost timer set to the time of day? When set properly,
the unit will be off, defrosting, between midnight and 3:30 a.m.
•
For Wine Captain Units and 75 Bev. Is the light on constantly to display the wine?
If the light is on constantly, this could cause the unit to run warmer.
The ice cubes are sticking together!
Questions to ask before scheduling a service call —
• Does the unit need to be defrosted?
• Is the door sealing properly? This could cause the ice cubes to stick together.
• Have you tried to ruffle the the ice bucket? If the ice sits without being used, it will
tend to stick together. Shaking the bucket will usually break apart the ice cubes. If
the ice has been sitting for a long time, we recommend dumping the bucket and making fresh ice.
CUSTOMER
COMPLAINT
CUSTOMER
COMPLAINT
GUIDE FOR SCREENING CALLS
Service and Parts Manual
10
No ice or not enough ice!
Questions to ask before scheduling a service call —
• Are you aware of the factory specifications for ice production?
Model # Approx. Daily Ice Rate Approx. Ice Storage
Combo 75A 22.5 lbs. 13 lbs. bucket
Combo 75FF 8 lbs. 13 lbs. bucket
Combo 29A 22 lbs. 13 lbs. bucket
Combo 29FF 8 lbs. 13 lbs. bucket
Model 95 23 lbs. 12 lbs. bucket
Model 98 25 lbs. 25 lbs. bucket
BI15 25 lbs. 25 lbs. bucket
• Is the temperature control set to the warmest setting? The unit will produce the most
ice when set at the warmest setting. Let the unit run overnight.
• Is the ice maker bin arm down? When the arm is up, it will not make ice.
• Is the door sealing properly? U-Line's warranty is 90 days for door adjustments.
• Does the water level need to be adjusted? U-Line's warranty is 90 days for water level
adjustments.
The unit is frosting up!
Questions to ask before scheduling a service call —
• Are you familiar with the defrost technology of the unit?
Defrost Technology Model Numbers
Manual Defrost Combo 75A, Combo 29A, 95, 98, 75, BI15
Cycle Defrost 75R, 29R, 15R, 75WC, 29WC, 15WC, BC85DT
Auto Defrost 29AD, 75AD, 75 Bev (periodic manual defrost may be needed)
Frost Free Combo 75FF, Combo 29FF
• Is the door sealing properly? U-Line's warranty is 90 days for door adjustments.
• Has the door been left open?
• Is the unit in an application of heavy usage? Heavy usage or high ambient temperatures will cause a unit to frost up.
Water is leaking out of the back of the unit!
Questions to ask before scheduling a service call —
• Have you checked the connection at the water solenoid valve? U-Line's warranty does
not cover installation adjustments.
The light on my Wine Captain/75 Bev never
shuts off!
Questions to ask before scheduling a service call —
• Did you turn the on/off switch near the base of the unit? The on/off switch is for the
light operation only. When the switch is in the off position, the light will turn on only
when the door is open. When the switch is in the on position, the light will be on constantly to display the wine. To shut the unit off, turn the temperature control all the
way counterclockwise.
CUSTOMER
COMPLAINT
CUSTOMER
COMPLAINT
CUSTOMER
COMPLAINT
CUSTOMER
COMPLAINT
11
Normal Vapor/Compression Cycle Refrigeration
• Refrigerant is pumped from the compressor to the condenser as a high pressure,
high temperature vapor.
• As the refrigerant cools in the high pressure condenser, the vapor condenses to liquid.
During this phase change, a great amount of heat is rejected with the help of the condenser fan.
• The liquid then flows to the dryer where it is strained and filtered.
• From the dryer, the refrigerant flows through the capillary tube which meters the liquid
refrigerant to the evaporator. The pressure of the refrigerant is reduced to the evaporating or low side pressure.
• The reduction of pressure on the liquid refrigerant causes it to boil or vaporize until it
reaches saturation temperature. As the low temperature refrigerant passes through
the evaporator coil, it continues to absorb a lot of heat, causing the boiling action to
continue until the refrigerant is completely vaporized. It is during this phase change
that the most heat is absorbed (the cooling takes place) in the refrigerator.
• The refrigerant vapor leaving the evaporator travels through the suction line to the
compressor inlet. The compressor takes the low pressure vapor and compresses it,
increasing both pressure and temperature. The hot high pressure gas is pumped out
the discharge line and into the condenser. The cycle continues.
CAPILLARY TUBE
DRYER
CONDENSER
COMPRESSOR
EVAPORATOR
UL183-1
REFRIGERATION SYSTEMS
Service and Parts Manual
12
U-Line Frost Free Refrigeration System
Cooling Mode:
• Bypass solenoid valve closed
• Evaporator fan operating
• Refrigerant flows through capillary tube
• Normal vapor/compression cycle refrigeration
Defrost Mode:
• Bypass solenoid valve open
• Refrigerant flows through bypass system
•Vapor flows from condenser to evaporator without a phase change
SOLENOID VALVE
CAPILLARY TUBE
VALVE IS CLOSED
FLOW WHEN SOLENOID
DRYER
CONDENSER
COMPRESSOR
EVAPORATOR
VALVE IS OPEN
FLOW WHEN SOLENOID
UL183-2
13
Compressor/Electrical Specifications
Compressor Pins
To measure start winding resistance, measure across the C-S pins.
To measure run winding resistance, measure across the C-R pins. These pins should
never measure any resistance to ground. This would indicate a shorted compressor.
Specifications
EMI3OHER Start Winding Resistance: 28 OHMS
EMI3OHER Run Winding Resistance: 8 OHMS
SD39 Start Winding Resistance: 11 OHMS
SD39 Run Winding Resistance: 5 OHMS
EMI5OHER Start Winding Resistance: 12 OHMS
EMI5OHER Run Winding Resistance: 4 OHMS
SD51 Start Winding Resistance: 5 OHMS
SD51 Run Winding Resistance: 5 OHMS
115 VOLT Ice Maker Heater Resistance: 80 OHMS
115 VOLT Water Valve Coil Resistance: 335 OHMS
C
S
R
OVERLOAD PROTECTOR
STARTING RELAY
RELAY COVER
UL183-3
EMI ER
Service and Parts Manual
14
System Suction Suction Compressor Condenser Capillary Evaporator Wattage
Condition Pressure Line Discharge Tube
Normal
Normal Slightly below Very hot Very hot Warm Cold Normal
room
temperature
Overcharge Higher than Very cold Slightly warm Hot to warm Cool Cold Higher than
normal may frost to hot normal
heavily
Undercharge Lower than Warm - near Hot Warm Warm Extremely cold Lower than
normal room near inlet - normal
temperature Outlet
below room
temperature
Partial Somewhat Warm - near Very hot Top passes Room Extremely cold Lower than
Restriction lower than room warm - temperature near inlet - normal
normal-in temperature Lower passes (cool) or Outlet
vacuum cool colder below room
(near room temperature
temperature) backing up
due to liquid
Complete In deep Room Room Room Room No Lower than
Restriction vacuum temperature temperature temperature temperature refrigeration normal
(cool) (cool) (cool) (cool)
No 0 PSIG Room Cool Room Room No Lower than
Gas to temperature to temperature temperature refrigeration normal
25" (cool) hot (cool) (cool)
Refrigeration System Diagnosis Guide
15
Ice Maker Operating Cycles
1. FREEZE CYCLE
A. Temperature control terminals 2 and 3 are closed
B. Power to the compressor
C. Power to the condenser fan
2. HARVEST-1 CYCLE
A. Temperature control terminals 2 and 3 are open - 2 and 1 close
B. No power to the compressor or condenser fan
C. If bin arm is down, power goes through bin arm switch to ice maker motor
and mold heater. If bin arm is up, the ice maker will not harvest.
3. HARVEST-2 CYCLE
A. Ice maker ejector blades reach approximately 2:00 position and cam
depresses the hold switch. Power goes through the hold switch to the ice
maker motor and mold heater.
B. Ejector blades stall on ice and ice maker motor pulsates until mold heater
warms and ice releases.
4. WATER FILL CYCLE
A. Ice maker ejector blades reach approximately 10:00 position and cam
depresses the water fill switch.
B. Power to the water valve. Ice maker mold fills.
5. EJECT CYCLE
A. Ejector blades push ice into bucket and stop at 12:00 position.
B. Temperature control terminals 2 and 3 have closed during harvest cycle.
C. Next freeze cycle begins with power to the compressor and condenser fan.
ICE MAKER OPERATION
Service and Parts Manual
16
Cycle Schematics
FREEZE CYCLE
ON
OFF
SWITCH
ON
OFF
SWITCH
LIMIT
SWITCH
black
black
black
black
COMP.
START
RELAY
black
orange
black
FAN
MOTOR
OVER
LOAD
FAN
MOTOR
black
black
blue
WATER
FILL
C
SWITCH
NC
MAKER
MOTOR
MOLD HEATER
ICE
orange
HARVEST-1 CYCLE
(Hold Switch In Normal Position)
black
black
black
brown
black
CONTROL
3
yellow
TEMP.
ground
WATER
VALVE
HOLD
SWITCH
NC
2
NO
red
BIN
1
SWITCH
white
C
NO
C
orange
UL183-4
ground
LIMIT
SWITCH
black
black
COMP.
START
RELAY
black
orange
black
OVER
LOAD
C
WATER
FILL
SWITCH
blue
NC
MAKER
MOTOR
MOLD HEATER
ICE
black
orange
black
brown
TEMP.
CONTROL
3
yellow
WATER
VALVE
HOLD
SWITCH
NC
2
NO
red
BIN
1
SWITCH
white
C
NO
C
orange
UL183-5
17
Cycle Schematics
HARVEST-2 CYCLE
(Hold Switch In Switched Position)
ON
OFF
SWITCH
LIMIT
SWITCH
black
black
black
COMP.
START
RELAY
black
orange
black
FAN
MOTOR
OVER
LOAD
black
black
blue
WATER
FILL
C
SWITCH
NC
ICE
MAKER
MOTOR
MOLD HEATER
WATER FILL CYCLE
orange
black
black
brown
TEMP.
CONTROL
3
yellow
ground
WATER
VALVE
HOLD
SWITCH
NC
2
NO
red
BIN
1
SWITCH
white
C
NO
C
orange
UL183-6
ON
OFF
SWITCH
LIMIT
SWITCH
black
black
black
COMP.
START
RELAY
black
orange
black
FAN
MOTOR
OVER
LOAD
C
black
WATER
SWITCH
FILL
blue
NC
ICE
MAKER
MOTOR
MOLD HEATER
black
orange
black
black
brown
TEMP.
CONTROL
3
yellow
ground
WATER
VALVE
HOLD
SWITCH
NC
2
NO
red
BIN
1
SWITCH
white
C
NO
C
orange
UL183-7
Service and Parts Manual
18
Temperature Control Specifications
Double Throw Ice Maker Thermostat Numbers
4548, AR-19-12, 2636, 2690, 2691, 2717
These temperature controls are double throw, single pole controls. The sensing tube is
inserted into the ice maker mold and senses mold temperature. After ice is sensed in
the mold, the 2-3 contacts open (stopping the compressor) and the 2-1 contacts are
closed (starting the ice maker motor). The 2-3 contacts close (2-1 contacts open)
before the end of the ice harvest cycle. This prepares the control for the next cycle.
RED WIRE
YELLOW WIRE
CONNECTION
1
2
3
ICE MAKER CONTROL
CONNECTION
BLUE/BLACK WIRE
CONNECTION
183-8
1
1
22
3
FREEZE POSITION ICE HARVEST POSITION
CYCLE
FREEZE 2 - 1 2 - 3
HARVEST 2 - 3 2 - 1
OPEN
CIRCUIT
CLOSED
CIRCUIT
183-9
3
19
Limit Switch Specifications
Normally Closed Bi-metal Switch
Open Temperature: 104 Degrees F
Close Temperature: 83 Degrees F
The function of this switch is to open in the event of an overheating condition. This
bi-metal thermostat is normally closed and does not initiate the ice harvest cycle.
The ice harvest cycle is initiated by a double throw, single pole switch located remotely from the ice maker assembly.
3.00
28.12
183-10
Service and Parts Manual
20
Ice Maker Diagnosis Flow Chart
DOES THE UNIT REFRIGERATE?
INTERMITTENT
NO
Sealed System Leak
Electrical Failure
Compressor Failure
Fan Motor Failure
Defrost System Failure
Temperature Control Failure
Water Adjustment
Bin Switch Failure
EVERYWHERE
Ice Motor Failure
Hold Switch Failure
Limit Switch Failure
Binding Cam/Ejector
DOES THE UNIT HARVEST ICE
IF THE EJECTOR BLADES ARE
MOVED BY HAND OR WITH A
YES
IS THERE VOL T AGE AT THE
SOLENOID V AL VE TERMINALS
YES
WRENCH ?
NO
WHERE DO THE
EJECTOR BLADES
STOP?
AT 12:00
DURING HARVEST?
Low V oltage
Voltage Drop
Wiring
AT 3:00
Mold Heater Failure
Water Switch Failure
NO
YES
Solenoid Valve Failure
UL183-11
21
Redesign Differentiation
Through our continuous efforts to improve our product line, U-Line Corporation has
made some changes to the design of Models Combo 29FF and Combo 75FF.
The objective of this section is to assist the service technician in differentiating between
the previous design product and the new redesign.
The redesign involves a new compressor, evaporator and heat exchanger, condenser fan
motor, evaporator fan motor, drain trough, timer and power cord.
To address service problems which may exist in earlier designs, we developed a “Field Fix
Kit.” It involves replacing the compressor, dryer, and hot gas valve. It also includes
mounting a sheet of insulation to the back panel. Before installing the new compressor,
hot gas bypass valve, and dryer, it is imperative that the entire refrigeration system be
blown out with nitrogen to remove any excess oil. This kit is to be installed in units with
R-134a only starting with serial number 7CF300000 or 2CF300000. Installation
instructions are included in each kit ordered.
The new compressor, a Matsushita Model SD39C replaces the previous compressor, an
Embraco EMI 50 HER.
Both the previous design and the new redesign are detailed in this manual. New design
units and previous design units can be differentiated by the serial numbers. All serial
numbers for the new redesigned units start with a number higher than 600000.
(Example: 2CF600001 is a new redesigned Combo 29FF.) Previous design units have
serial numbers which start with 300001, 400001, or 500001. (Example:
7CF400001 is a previous design Combo 75FF.)
Pages 45-46 show the parts breakdown for the previous design of the Combo
29FF. The parts replaced with the kit are denoted. The wiring diagram for this
model is on page 36.
Pages 41-42 show the parts breakdown for the previous design of the Combo
75FF. The parts replaced with the kit are denoted. The wiring diagram for this
model is on page 36.
Pages 47-48 show the parts breakdown for the new, redesign of the Combo
29FF. The wiring diagram for this model is on page 37. The information for the
hybrid redesign of the Combo 29FF can be found in the Échelon Service Manual.
Pages 43-44 show the parts breakdown for the new, redesign of the Combo
75FF. The wiring diagram for this model is on page 37.
FROST FREE UNITS
Service and Parts Manual
22
Typical Frost Free Airflow Configuration
Air Flow In At
Evaporator Blade
Air Passes
Through Fin/Tube
Evaporator
Air Flow Out At
Evaporator Outlet
Condensate Drains Down Trough Under Evaporator,
Into Drain Cup, And Into Condensate Pan Through
Drain Hose. The Drain Trough Is Warmed During
Defrost By Contact with Evaporator Fins.
UL183-12
23
Disassembly Procedures
Model Combo C075FF
1. Disconnect from power source.
2. Disconnect ice maker wires in back of unit.
3. Remove screws (6) from freezer housing.
4. Slide out freezer housing with ice maker unit
attached.
5. Remove screws (4) from evaporator cover.
6. Slide evaporator cover out of clips (2).
To remove fan blade/motor:
1. Disconnect fan wires in the back of unit.
2. Remove fan blade by sliding off fan motor
shaft.
3. Remove screws (2) from fan motor mounting bracket.
4. Remove mounting nuts (2) from fan motor
studs.
To remove evaporator:
1. Disconnect copper tubing. Be sure to
reclaim, recycle or recover refrigerant.
2. Remove screw from evaporator clip (2).
3. Slide out evaporator.
HOUSING
FREEZER
SCREWS (2)
SCREWS (2)
UNIT
ICE MAKER
UL183-13
COVER
EVAPORATOR
SCREWS (4)
CLIP
UL183-14
EVAPORATOR
SCREWS (2)
CLIP (2)
EVAPORATOR
AND BLADE
FAN MOTOR
NUTS (2)
FAN MOTOR
UL183-15
Service and Parts Manual
24
Model Combo C029FF
1. Disconnect from power source.
2. Disconnect ice maker wires in back of unit.
3. Remove screws (3) from freezer housing.
4. Slide out freezer housing with ice maker unit
attached.
5. Remove screws (4) from evaporator cover.
6. Slide evaporator cover out of clips (2).
To remove fan blade/motor:
1. Disconnect fan wires in the back of unit.
2. Remove fan blade by sliding off fan motor
shaft.
3. Remove screws (2) from fan motor mounting bracket.
4. Remove mounting nuts (2) from fan motor
studs.
To remove evaporator:
1. Disconnect copper tubing. Be sure to
reclaim, recycle or recover refrigerant.
2. Remove screw from evaporator clip (2).
3. Slide out evaporator.
HOUSING
FREEZER
UNIT
ICE MAKER
SCREWS (2)
UL183-16
COVER
EVAPORATOR
CLIP
SCREWS (4)
UL183-17
NUTS (2)
FAN MOTOR
CLIP (2)
EVAPORATOR
EVAPORATOR
SCREWS (2)
AND BLADE
FAN MOTOR
UL183-18
25
Model Combo 75RF
1. Disconnect from power source.
2. Remove freezer door.
3. Slide out mullion.
4. Remove screws.
To remove fan blade/motor:
1. Disconnect fan wires in the back of unit.
2. Remove fan blade by sliding off motor shaft.
3. Remove screws (2) from mounting bracket.
4. Remove nuts from fan motor studs.
To remove evaporator:
1. Recover all refrigerant.
2. Disconnect copper tubing.
3. Remove mounting screws (4) from
evaporator.
4. Slide out evaporator.
EVAPORATOR COVER
MULLION
UL183-19
EVAPORATOR
FAN & MOTOR
UL183-20
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