Sub-Zero UC-15I User manual

INSTALL THE CONTROL BOARD
1On the new control board set the P4 jumper to the correct
refrigerant, R290, or R134A.
2Place the control board onto the posts in the control box.
3Use a Phillips screwdriver to install the control board
mounting screws.
4Connect the wire harnesses to the control board.
Undercounter Icemaker (HC)
Exterior Components Removal and Installation
Install the Control Board (continued)
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R290 REFRIGERANT SERVICE INFORMATION
The sealed system contains R290 (propane) refrigerant. This
section provides general rules for working with R290 and
explains procedures for servicing the sealed system.
• Use equipment dedicated to R290 sealed system service
only.
• Always evacuate R290 refrigerant to the outdoors.
• Use only nitrogen for back-flushing.
• Use only R290 refrigerant for sweep charging.
• Always replace the filter drier when servicing the sealed
system.
• The filter drier must be cut from the sealed system. Never
unbraze the drier, as the heat can cause combustion of
residual refrigerant and drive moisture back into the sealed
system.
• When the rubber plugs are pulled from the service
compressor, there is an audible release of pressure. If the
release of pressure is not heard, do not use the compressor.
• Do not leave the sealed system or replacement compressor
open to the atmosphere for more than 10 minutes.
• Never use a brazing torch or hot work equipment.
• Use only flameless sealed system repair equipment.
• Allow the sealed system to reach room temperature before
doing sealed system repairs.
• Briefly turn the compressor over to help release residual
refrigerant from the oil in the compressor.
• Only use virgin R290 refrigerant when recharging the sealed
system.
WARNING
Refer to the serial number tag for the type of
refrigerant in the unit. Units that contain R290
refrigerant in their sealed systems. R290 refrigerant is
extremely flammable. Combustion occurs at 878°F
(470°C). Do not use a brazing torch or any hot work
equipment when servicing the sealed system to
avoid serious injury or death.
WARNING
Disconnect the electrical power to any appliance
covered in this document before servicing. All
electrical power must be disconnected from unit
before servicing the sealed system.
WARNING
If electrical power is needed for component testing or
diagnostics, disconnect the electrical power
immediately after testing or diagnostics are
complete. Failure to do so could cause serious injury
or death.
WARNING
If electrical power is supplied to this appliance and
the appliance is turned off, line voltage is still present
at the main control board.
WARNING
This unit must be installed in accordance with the
ASHRAE 15 Safety Standard for Refrigeration
Systems.
WARNING
This unit cannot be installed in corridors or hallways
of public buildings.
Undercounter Ice Maker (HC)
Sealed System Information
SEALED SYSTEM INFORMATION
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LOKRING FITTINGS FOR UC-15I
LOKRING: UC-15I
Component Tubing Sizes Quantity LOKRING (Vulkan) Size Vulkan Article (Part) Number
Evaporator Suction line 1/4" →1/4" 1 6 NK MS 00 L13000588
Capillary tube 1/4" →1/4" 1 6 NK MS 00 L13000588
Compressor
Process line 1/4" →1/4" 1 6 NK MS 00 L13000588
Suction line 5/16" →5/16" 1 8 NK MS 00 L13000588
Discharge line 1/4" →1/4" 1 6 NK MS 00 L13000588
Condenser All lines 1/4" →1/4" 1 6 NK MS 00 L13000588
Drier
1/4" →1/4" 1 6 NK MS 00 L13000588
1/4" →1/4" 1 6 NK MS 00 L13000592
Undercounter Ice Maker (HC)
Sealed System Information
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6-2
#7012423 - Revision B - May, 2011
Troubleshooting Model UC-15I (Undercounter Ice Machine)
TROUBLESHOOTING GUIDE
This section of the manual contains the Troubleshooting Guide which will help the Service Technician troubleshoot a
model UC-15I.
How to Use the Troubleshooting Guide
3
The list below indicates how the Troubleshooting Guide is arranged. Identify the description of the problem that the
unit is experiencing from the list and go to the page indicated. To the left of the problem description is a letter.
Locate that letter in the left column of the Troubleshooting Guide. The center column will identify the possible caus-
es for the problem. And, the information in the right column will explain what tests to perform in order to determine if
what you are checking is the cause and/or what action to take to correct the problem.
Troubleshooting Guide Layout
Page #
A. Ice Machine Does Not Operate ............................................................................................................................................. 6-3
B. Ice Machine Operates, but Will Not Make Ice .................................................................................................................... 6-3
C. Ice Machine Makes Ice, but Cubes Do Not Release from Mold ....................................................................................... 6-5
D. Slow/Low Ice Production .................................................................................................................................................... 6-5
E. Cubes are Shallow, Incomplete or White ........................................................................................................................... 6-6
F. Cubes are Too Big ............................................................................................................................................................... 6-6
G. Bin Front Panel Sweats ......................................................................................................................................................... 6-6
NOTE: See WARNING below before beginning troubleshooting.
ELECTRICAL SHOCK HAZARD! WHEN UNIT IS PLUGGED INTO AN ELECTRICAL OUTLET, HIGH (LINE)
VOLTAGE IS APPLIED TO THE CONTROL BOARD (TERMINALS #20 AND #21) AT ALL TIMES. REMOVING
THE CONTROL BOARD FUSE OR SWITCHING THE UNIT TO OFF WILL NOT REMOVE THE POWER SUP-
PLIED TO THE CONTROL BOARD.

6-3 #7012423 - Revision B - May, 2011
Model UC-15I (Undercounter Ice Machine) Troubleshooting
PROBLEM POSSIBLE CAUSE TEST / ACTION
A. Ice Machine Does Not
Operate
B. Ice Machine Operates, but
Will Not Make Ice
(Continued on next page)
Improper Ambient Temperatures
No Electrical Power to Appliance
Control Board Fuse Open
Transformer Fault
Control Board Fault
Control Panel (User Interface) Board
Fault
Bin Thermostat Fault
Drain Pump Safety Switch is Open.
(UC-15IP, UC-15IPO Only)
Improper Ambient Temperatures
Improper Water Pressure
Ambient air temperature minimum = 50°F
(10°C), maximum = 100°F (38°C) for models
UC-15I and UC-15IP; 110°F (43°C) for models
UC-15IO and UC-15IPO. Advise customer.
NOTE: Check control board light to see if ice
machine shutdown on over temperature limit
(control board light will flash rapidly).
a. Verify fuse or circuit breaker is closed.
Replace fuse; switch circuit breaker on. If
circuit breaker trips or fuse blows again,
check for electrical short at outlet or appli-
ance.
b. Verify ice machine is plugged into function-
ing, properly polarized and grounded 3-
prong receptacle. Plug unit in; repair elec-
trical outlet or power cord.
c. See Wiring Diagrams and check for voltage
at appropriate points from outlet to control
board in control box. Reconnect, repair,
replace wiring or connectors.
Visually inspect fuse, replace if open.
If interior light functions or red control board
light is energized, transformer is OK. If trans-
former is receiving power but no output,
replace transformer.
If transformer is supplying power to control
board and red control board light will not ener-
gize, replace control board.
If red control board light is energized, but
pressing “POWER” does not energize green
“POWER” light, then check wiring between
main control board and control panel board. If
wiring is defective, replace wire harness; if
wiring is good, replace control panel board.
With no ice on bin level sensing tube, thermo-
stat should be closed; open with ice on tube
after ~ 3 minutes. Replace if defective.
Check drain hose for kinks or restrictions.
Repair or replace bad hose.
Ambient air temperature minimum = 50°F
(10°C), maximum = 100°F (38°C) for models
UC-15I and UC-15IP; 110°F (43°C) for models
UC-15IO and UC-15IPO. Advise customer.
NOTE: Check control board light to see if ice
machine shutdown on over temperature limit
(control board light will flash rapidly).
Water pressure must be 20 - 80 psi (1.4 - 5.5
bar). Advise customer.