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406P
Manuel de service
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Operator’s Manual
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Delfield 406P, 406CA-DHL Manuel de service

Compact Refrigerators & Freezers
400 & 4000 Series
Original Instructions
Service Manual
English
Part Number 400_4000_Service_Manual 01/18
Safety Notices
n
Read this manual thoroughly before operating, installing or performing maintenance on the equipment. Failure to follow instructions in this manual can cause property damage, injury or death.
DANGER
Do not install or operate equipment that has been misused, abused, neglected, damaged, or altered/ modified from that of original manufactured specifications.
DANGER
Keep power cord AWAY from HEATED surfaces. DO NOT immerse power cord or plug in water. DO NOT let power cord hang over edge of table or counter.
DANGER
All utility connections and fixtures must be maintained in accordance with Local and national codes.
n
Authorized Service Representatives are obligated to follow industry standard safety procedures, including, but not limited to, local/national regulations for disconnection / lock out / tag out procedures for all utilities including electric, gas, water and steam.
n
Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance. Never use flammable oil soaked cloths or combustible cleaning solutions, for cleaning.
n
Do not use electrical appliances or accessories other than those supplied by the manufacturer.
n
Use caution when handling metal surface edges of all equipment.
n
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision concerning use of the appliance by a person responsible for their safety. Do not allow children to play with this appliance.
Caution
,
Use caution handling, moving and use of the R290 refrigerators to avoid either damaging the refrigerant tubing or increasing the risk of a leak. Components shall be replaced with like components. Servicing shall be done by a factory authorized service personnel to minimize the risk of possible ignition due to incorrect parts or improper service.
Notice
Proper installation, care and maintenance are essential for maximum performance and trouble-free operation of your equipment. Visit our website www. mtwkitchencare.com for manual updates, translations, or contact information for service agents in your area.
n
This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Operation, installation, and servicing of this product could expose you to airborne particles of glasswool or ceramic fibers, crystalline silica, and/or carbon monoxide. Inhalation of airborne particles of glasswool or ceramic fibers is known to the State of California to cause cancer. Inhalation of carbon monoxide is known to the State of California to cause birth defects or other reproductive harm.
Section 1 General Information
Section 2 Installation
Section 3 Operation
Table of Contents
Model Numbers .................................................................................................................. 5
Serial Number Location ..................................................................................................... 5
Warranty Information ........................................................................................................ 5
Regulatory Certifications ..................................................................................................5
Location ..............................................................................................................................7
Weight of Equipment .........................................................................................................8
Clearance Requirements ....................................................................................................8
Dimensions ......................................................................................................................... 8
Electrical Service ................................................................................................................ 9
Voltage .......................................................................................................................................................9
Rated Amperages, Horsepower, Voltage & Power Cord Chart ...............................................9
Heat of Rejection ................................................................................................................ 9
Drain Connections ............................................................................................................10
Caster Or Leg Installation ................................................................................................10
Leg Leveling .......................................................................................................................................... 10
Caster and Leg Mounting Detail .................................................................................................... 11
Loosen Freezer Compressor Bolts ................................................................................... 11
Section 4 Maintenance
Section 5 Troubleshooting
Controls/Programming/Settings ....................................................................................14
R404A Refrigerators ............................................................................................................................ 14
R290 Refrigerators ............................................................................................................................... 14
Freezers ................................................................................................................................................... 15
Evaporator Fan Operation ................................................................................................................ 15
Cleaning and Sanitizing Procedures ...............................................................................17
General .................................................................................................................................................... 17
Interior Cleaning .................................................................................................................................. 18
Exterior Cleaning ................................................................................................................................. 18
Doors/Hinges ........................................................................................................................................ 18
Preventing Blower Coil Corrosion ................................................................................................. 19
Field Installation ..................................................................................................................................19
Casters ..................................................................................................................................................... 19
Cleaning the Condenser Coil .......................................................................................................... 19
Drain ......................................................................................................................................................... 19
Evaporator Drain Line Maintenance, Part 1 ..................................................................20
Evaporator Drain Line Maintenance, Part 2 ...................................................................20
Problem -> Cause -> Correction Chart ............................................................................21
Part Number 400_4000_Service_Manual 01/18 3
Section 6 Refrigeration
R404A
R290
Section 7 Air Flow
Table of Contents (continued)
Refrigerant Recovery / Evacuation & Recharging .......................................................... 23
Charging Procedures .......................................................................................................23
System Contamination Clean-up ....................................................................................24
Mild System Contamination Clean-Up Procedure .........................................................25
Severe System Contamination Clean-Up Procedure .....................................................25
Filter Driers .......................................................................................................................26
Refrigerant Re-Use Policy ................................................................................................26
Refrigeration Components Overview .............................................................................27
Properties of R-290 (Propane) .........................................................................................28
Service Procedures ...........................................................................................................29
Normal Operating Temperatures for Models Using Refrigerant R290 .........................31
86°F (30°C) Ambient / 32° (0°C) Degree Box Temperature ...........................................32
100°F (38°C) Ambient / 32°F (0°C) Box Temperature .....................................................33
Review ...............................................................................................................................34
Unit Air Flow Design ........................................................................................................35
Section 8 Control
Power Cord at Junction Box .............................................................................................36
R290 Refrigeration Control Specifications .....................................................................36
Control Thermistor Connections .....................................................................................37
Thermistor Installation ....................................................................................................37
Unit Operation ..................................................................................................................37
Service Tips ......................................................................................................................37
Section 9 Diagrams
R404A Compressor Wiring ...............................................................................................38
Models 402, 406, 406CA, ST4048 & UC4048 ..................................................................39
402P, 406P, 406CAP, ST4048P, UC4048P ......................................................................... 40
Export Models 402-CE, 406-CE, 406CA-CE, ST4048-CE & UC4048-CE ..........................41
Models 403, 407, 407CA, ST4148 & UC4148 ..................................................................42
Export Models 403-CE, 407-CE & 407CA-CE ................................................................... 43
Export Models ST4148-CE & UC4148-CE ........................................................................ 44
Section 10 Replacement Procedures
406P - Connect Compressor’s Starter Box ...................................................................... 45
Door Mounting Bracket ...................................................................................................46
Door Gasket ...................................................................................................................... 46
4 Part Number 400_4000_Service_Manual 01/18
Section 1
General Information
Model Numbers
This manual covers standard units only.
NOTE: For custom units, consult Manitowoc KitchenCare at 1-844-724-CARE.
Work Top Refrigerator Bases With Stainless Steel Top &
Backsplash
402, 402P ST4048, ST4048P
Undercounter Refrigerator Bases With Stainless Steel Top
406, 406P UC4048, UC4048P
Undercounter Refrigerator With Subtop And 3.75” Casters
406CA, 406CAP
The prefix P on a model number indicates the use of the refrigerant propane.
Work Top Freezer Bases With Stainless Steel Top &
Backsplash
403 ST4148
Undercounter Freezer Bases With Stainless Steel Top
407 UC4148
Undercounter Freezer With Subtop And 3.75” Casters
407CA
Serial Number Location
The serial number on 400 series compact refrigerators and freezers is printed on the right side of the interior back wall.
The serial tag on 4000 series compact refrigerators and freezers is located either on the left upper sidewall inside the cabinet or under the top nosing directly above the door when the door is in the closed position (right hand door when there are two doors).
Always have the serial number of your unit available when calling for parts or service.
Warranty Information
Visit
http://www.delfield.com/minisite/service/warranty_info to:
• Register your product for warranty.
• Verify warranty information.
• View and download a copy of your warranty.
Regulatory Certifications
Models are certified by:
• National Sanitation Foundation (NSF)
• Underwriters Laboratories (UL)
• Underwriters Laboratories of Canada (CUL)
Part Number 400_4000_Service_Manual 01/18 5
General Information Section 1
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6 Part Number 400_4000_Service_Manual 01/18
Section 2
Installation
DANGER
Installation must comply with all applicable fire and health codes in your jurisdiction.
DANGER
Use appropriate safety equipment during installation and servicing
n
Remove all removable panels before lifting and installing.
n
Do not damage the refrigeration circuit when installing, maintaining or servicing the unit.
Location
n
This equipment must be positioned so that the plug is accessible unless other means for disconnection from the power supply (e.g., circuit breaker or disconnect switch) is provided.
n
Adequate means must be provided to limit the movement of this appliance without depending on or transmitting stress to the electrical conduit or gas lines.
n
To avoid instability the installation area must be capable of supporting the combined weight of the equipment and product. Additionally the equipment must be level side to side and front to back.
n
This equipment is intended for indoor use only. Do not install or operate this equipment in outdoor areas.
Caution
,
Do not position the air intake vent near steam or heat exhaust of another appliance.
The location selected for the equipment must meet the following criteria. If any of these criteria are not met, select another location.
• Units are intended for indoor use only.
• The location MUST be level, stable and capable of supporting the weight of the equipment.
• The location MUST be free from and clear of combustible materials.
• Equipment MUST be level both front to back and side to side.
• Position the equipment so it will not tip or slide.
• Front casters MUST be locked once positioned.
• Recommended air temperature is 41° - 86°F (5° - 30°C).
• Proper air supply for ventilation is REQUIRED AND CRITICAL for safe and efficient operation. Refer to Clearance Requirements chart on page 8.
• Do not obstruct the flow of ventilation air. Make sure the air vents of the equipment are not blocked.
Part Number 400_4000_Service_Manual 01/18 7
Installation Section 2
• Do not install the equipment directly over a drain. Steam rising up out of the drain will adversely affect operation, air circulation, and damage electrical / electronic components.
Weight of Equipment
Model Weight
402, 402P 176lbs (80kg)
403 184lbs (83kg)
406, 406P 176lbs (80kg)
406CA, 406CAP 168lbs (76kg)
407 176lbs (80kg)
407CA 168lbs (76kg)
ST4048, ST4048P 234lbs (106kg)
ST4148 242lbs (110kg)
UC4048, UC4048P 236lbs (107kg)
UC4148 236lbs (107kg)
Clearance Requirements
DANGER
Minimum clearance requirements are the same for noncombustible locations as for combustible locations. The flooring under the appliance must be made of a noncombustible material.
DANGER
Risk of fire/shock. All minimum clearances must be maintained. Do not obstruct vents or openings.
Back 3.00” (76mm)
Top / Sides 1.00” (25mm)
Bottom 2.00” (51mm)
• Keep the vents clean and free of obstruction.
• The factory installed legs must be used and not removed.
Dimensions
Model Length Depth Height
402,
402P
403 27” (69cm) 28.5” (72cm) 39.5” (100cm)
406,
406P
406CA,
406CAP
407 27” (69cm) 28.5” (72cm) 35.5” (90cm)
407CA 27” (69cm) 27.75” (70cm) 33.25” (84cm)
ST4048,
ST4048P
ST4148 48” (122cm) 28.5” (72cm) 39.5” (100cm)
UC4048,
UC4048P
UC4148 48” (122cm) 28.5” (72cm) 35.5” (90cm)
Model Volume Shelf Space
402
402P
403 406
406P
406CA
406CAP
407
407CA
ST4048
ST4048P
ST4148
UC4048
UC4048P
UC4148
27” (69cm) 28.5” (72cm) 39.5” (100cm)
27” (69cm) 28.5” (72cm) 35.5” (90cm)
27” (69cm) 27.75” (70cm) 33.25” (84cm)
48” (122cm) 28.5” (72cm) 39.5” (100cm)
48” (122cm) 28.5” (72cm) 35.5” (90cm)
3
5.7Ft
(161L) 4.6Ft2 (43dm2)
3
10.80Ft
(306L) 8.0Ft2 (74dm2)
8 Part Number 400_4000_Service_Manual 01/18
Section 2 Installation
Electrical Service
DANGER
Check all wiring connections, including factory terminals, before operation. Connections can become loose during shipment and installation.
DANGER
Units with two power cords must be plugged into individual branch circuits. During movement, cleaning or repair it is necessary to unplug both power cords.
n
This appliance must be grounded and all field wiring must conform to all applicable local and national codes. Refer to rating plate for proper voltage. It is the responsibility of the end user to provide the disconnect means to satisfy the authority having jurisdiction.
VOLTAGE
All electrical work, including wire routing and grounding, must conform to local, state and national electrical codes.
The following precautions must be observed:
• The equipment must be grounded.
• A separate fuse/circuit breaker must be provided for each unit.
• A qualified electrician must determine proper wire size dependent upon location, materials used and length of run (minimum circuit ampacity can be used to help select the wire size).
• The maximum allowable voltage variation is ±10% of the rated voltage at equipment start-up (when the electrical load is highest).
• Check all green ground screws, cables and wire connections to verify they are tight before start-up.
RATED AMPERAGES, HORSEPOWER, VOLTAGE & POWER CORD CHART
Units with plugs are supplied with approximately 6ft (183cm) cords.
Models 406 and 407 may be stacked using a stacking collar. In this case two 6ft (183cm) long grounded supply cords and plugs are standard.
Model Amps HP Voltage,
Cycle, Phase
402,
402P
403 5.8
406,
406CA,
406CAP
406P
407,
407CA
ST4048,
ST4048P
ST4148 5.6 1/3
UC4048,
UC4048P
UC4148 5.6 1/3
4.0
4.0
5.8
4.0
4.0 1/5
1/5
115/60/1 5-15P
NEMA
Plug
Heat of Rejection
Model BTU/Hour
Capacity
402 1100 1430 7oz R404A
402P 1356 210 100g R290
403 840 1092 7oz R404A
406 1100 1430 7oz R404A
406CA 1100 1430 7oz R404A
406CAP 1356 210 100g R290
406P 1356 210 100g R290
407 800 339 6.5oz R404A
407CA 800 339 6.5oz R404A
ST4048 1100 1430 7oz R404A
ST4048P 1356 316 100g R290
ST4148 1080 1404 7oz R404A
UC4048 1100 1430 7oz R404A
UC4048P 1356 316 100g R290
UC4148 1080 1404 7oz R404A
Heat of
Rejection
Charge
Part Number 400_4000_Service_Manual 01/18 9
Installation Section 2
Drain Connections
n
If a refrigerated base does not have a condensate evaporator supplied, you must connect the condensate line to a suitable drain. Otherwise, water will collect on the floor, causing a potentially hazardous situation.
n
Moisture collecting from improper drainage can create a slippery surface on the floor and a hazard to employees. It is the owner’s responsibility to provide a container or outlet for drainage.
Caster Or Leg Installation
DANGER
Legs or casters must be installed and the legs or casters must be screwed in completely to prevent bending. When casters are installed the mass of this unit will allow it to move uncontrolled on an inclined surface. These units must be tethered/secured to comply with all applicable codes.
Installation Instructions
1. Carefully place the unit on its back.
2. Located at each caster mounting location are 4 Phillips head screws, for a total of 16 screws. Remove them.
3. Place a locking plate caster or leg over one of the front holes, matching the 4 mounting holes to the pre-drilled holes in the underside of the unit. Insert 4 Phillips head screws and tighten. Repeat with the other locking front caster or leg.
4. Repeat step 3 with the non-locking casters or legs in the rear of the unit.
5. Carefully lift the unit upright.
Caution
,
After installing casters, the unit must stand upright for twenty-four (24) hours before being powered up to assure oil return to the compressor sump.
Plate Casters
With Locks
n
The unit must be installed in a stable condition with the front wheels locked. Locking the front casters after installation is the owner’s and operator’s responsibility.
n
Use a jack to lift the refrigeration unit off the ground just far enough to remove the leg/caster. Place blocking underneath the unit. Do not work underneath a raised unit without proper blocking. Do not lift the unit more than necessary to remove the leg/caster. Lifting the unit too far can make the unit unstable.
Caution
,
All single-section units require that the sw ivel casters be mounted on the front and rigid casters be mounted on the rear.
Plate Casters
Without Locks
Screws
LEG LEVELING
All four legs are adjustable. Adjust each leg until the unit is stable and level left to right. If necessary adjusting the front legs slightly higher than the rear by about 1/8” (3mm) will help the door remain closed.
10 Part Number 400_4000_Service_Manual 01/18
Section 2 Installation
2.38”
(60mm)
3.40”
(86mm)
2.38”
(60mm)
3.40”
(86mm)
2.82”
(72mm)
1.75”
(44mm)
CASTER AND LEG MOUNTING DETAIL
A universal bolt hole pattern is provided on the bottom of the cabinet. It will accommodate any leg or caster. Simply line up the plate holes with the corresponding cabinet holes.
2.38”
(60mm)
3.40”
(86mm)
NOTE: If hole pattern on caster/leg matches the one above mount in outer set of holes.
• 6” Leg - 3234569
1.75”
(44mm)
0.94”
(24mm)
2.14”
(54mm)
NOTE: If hole pattern on caster/leg matches the one above mount in inner set of holes.
• 2” Caster - 3234148
Loosen Freezer Compressor Bolts
Semi hermetic models should be loosened before operating. Loosen (but do not remove) the bolts on the compressor. If not done the freezer may vibrate excessively when the compressor is running,
2.82”
(72mm)
NOTE: If hole pattern on caster/leg matches the one above mount in middle set of holes.
• 3” Caster - 3234024
• 5” Caster - 3234161
• 6” Leg - 3234791
Part Number 400_4000_Service_Manual 01/18 11
Installation Section 2
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12 Part Number 400_4000_Service_Manual 01/18
Section 3
Operation
DANGER
The on-site supervisor is responsible for ensuring that operators are made aware of the inherent dangers of operating this equipment.
DANGER
Do not operate any appliance with a damaged cord or plug. All repairs must be performed by a qualified service company.
DANGER
Never stand on the unit! They are not designed to hold the weight of an adult, and may collapse or tip if misused in this manner.
n
Do not contact moving parts.
Caution
,
Do not throw items into the storage area. Failure to heed this recommendation could result in damage to the interior of the cabinet or to the blower coil.
n
All covers and access panels must be in place and properly secured, before operating this equipment.
n
Do not use electrical appliances inside the food storage compartment of this appliance.
n
The operator of this equipment is solely responsible for ensuring safe holding temperature levels for all food items. Failure to do so could result in unsafe food products for customers.
n
Overloading shelves can damage equipment or cause bodily injury.
n
Damp or wet hands may stick to cold surfaces.
Caution
,
Do not block the supply and return air grills or the air space around the air grills. Keep plastic wrappings, paper, labels, etc. from being airborne and lodging in the grills. Failure to keep the air grills clear will result in unsatisfactory operation of the system.
Part Number 400_4000_Service_Manual 01/18 13
Operation Section 3
Controls/Programming/Settings
R404A REFRIGERATORS
After the unit is connected to power it will automatically begin operating. With the doors closed, the temperature of the cabinet should reach 36°F to 40°F (2°C to 4°C) on refrigerators in about one hour.
A thermostat located in the evaporator housing on interior rear of the unit, controls the temperature in the box. The factory setting for the control is 4 and maintains about 38°F (3°C) in the box. Set toward 1 for higher temperatures and toward 7 for lower temperatures.
Refrigerators defrost automatically with every cycle of the compressor. The water generated is routed to a pan on the rear of the unit and is evaporated by the heat given off by the compressor.
During normal operation the evaporator fan may cycle and/or pulse independently of the compressor. Consult the service manual or contact Technical Support at 1-844-724-CARE if you are unsure of the proper function.
R290 REFRIGERATORS
At initial start-up or anytime power is disconnected, then reconnected to the unit, the control will delay all operations for a short time (up to 30 minutes.) While in this delay period the control will initialize.
With the doors closed, the temperature of the cabinet should reach 36°F to 40°F (2°C to 4°C) on refrigerators in about one hour. The electronic temperature control constantly monitors box temperature and evaporator coil temperature to maintain consistent product temperatures.
Refrigerators periodically go into defrost to allow the accumulated frost on the evaporator to clear, the compressor and condenser fan motor will turn off when the temperature control detects a certain evaporator temperature. After the defrost cycle is complete, the temperature control will return to a normal cooling cycle. The water generated is routed to a pan on the rear of the unit and is evaporated by the heat given off by the compressor.
During normal operation the evaporator fan may cycle and/or pulse independently of the compressor. Consult the service manual or contact Technical Support at 1-844-724-CARE if you are unsure of the proper function.
Electronic Temperature Control Location & Adjustment
Rear View Of R290 Refrigerator
The control is located in the control box at the rear of the unit. Never turn the knob more than one dial
number and always allow eight hours for temperature stabilization before making any additional adjustments.
To adjust for colder temperatures, turn the knob clockwise. For warmer temperatures, turn the knob counter­clockwise. Turn the knob fully counter-clockwise to turn the refrigeration system off.
14 Part Number 400_4000_Service_Manual 01/18
Section 3 Operation
FREEZERS
This unit does not have a power switch, plug the unit in to begin operation. At initial start-up or anytime power is disconnected, then reconnected to the unit, the control will delay all operations for a short time (up to 40 minutes.) While in this delay period, the control initializes the control parameters and confirms that the temperature sensors and circuits are operational.
After initializing, the control will immediately enter a DEFROST mode. The compressor and condenser fan as well as the evaporator fan will remain off until initial defrost is complete. This initial defrost cycle may take up to 15 minutes to complete, at which time the freezing cycle will begin.
After initializing and the defrost cycle, the electronic temperature control will cycle the compressor, evaporator fan motor, and condenser fan motor to maintain box temperature at the control setting.
With the doors closed, the temperature of the cabinet should reach 0°F (-18°C) on freezers in about one hour after the freezing cycle begins. The electronic temperature control constantly monitors box temperature as well as evaporator coil temperature to maintain consistent product temperatures. As an added energy-saving feature, the electronic controller will switch the evaporator fan motor on and off with the compressor and condenser fan motor.
During normal operation the evaporator fan may cycle and/or pulse independently of the compressor. Consult the service manual or contact Technical Support at 1-844-724-CARE if you are unsure of the proper function.
Freezer Automatic Defrost
The control also monitors compressor total running time and will enter a defrost cycle after total compressor running time is greater than five hours since the last defrost cycle OR if evaporator coil temperature drops below -34°F (-37°C) (indicating excessive frost on the coil).
Freezer Manual Defrost
If a manual defrost is desired, simply unplug the unit for several seconds, then plug unit back in. This will cause the control to re-initialize and then enter a defrost cycle.
When the control enters the defrost mode, whether manual or automatic, it switches off the evaporator fan motor, compressor and condenser fan motor, and switches on the defrost heater to warm the evaporator coil and melt all frost accumulated during the previous refrigeration cycle. The control will continue the defrost cycle for a MINIMUM of eight minutes and a MAXIMUM of 30 minutes depending on the amount of frost accumulated on the evaporator coil.
After the defrost cycle is complete, the control returns to a normal refrigeration cycle, however the evaporator fan motor will not switch on for two minutes AFTER the compressor and condenser fan motor have begun operating.
EVAPORATOR FAN OPERATION
Cooling Cycle Defrost Cycle
Compressor OnCompressor
Off
Evap Fan Evap Fan Evap Fan
Compressor
Off
Electronic Temperature Control Location & Adjustment
Never turn the knob more than one dial number and always allow eight hours for temperature stabilization before making any additional adjustments. The control
is located in the control box at the rear of the unit. It is
R404A
Refrigerators
R290
Refrigerators
Freezer On Off Off
On On On
On Cycles
On 3-Min
Off 3Min
On
factory set at mid-range to maintain about -3°F (-18°C) box temperature. To adjust for colder temperatures, turn the knob clockwise. For warmer temperatures, turn the knob counter-clockwise. Turn the knob fully counter-clockwise to turn the refrigeration system off.
Part Number 400_4000_Service_Manual 01/18 15
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