Test / Action - Sub-Zero Wolf 506UI Service Manual

Model 506 (UC Ice Maker)
Model 506 (UC Ice Maker)
PROBLEM
A.
Compressor won't run; No
ice in bin.
B.
Compressor runs; No Ice
in bin.
C. Compressor runs
continuously; bin full of
ice.
D. Low ice yield.
E. Excessive water dripping
on ice cubes.
F. Mineral deposit on
evaporator.
G. Ice cubes too thin
POSSIBLE CAUSE
1. Unit located in cold area.
2. Power disconnected.
3. Broken wire or loose connection.
4. Defective compressor start relay.
5. Service switch in "off" position.
6. Bin thermostat contacts open.
7. Defective compressor motor.
8. Master Switch in "Clean" position
1. Water supply shut off.
2. Inoperative water valve.
3. Evap thermostat out of calibration.
4. Hot gas solenoid stuck.
5. Inoperative refrigeration system.
6. Excess use of ice cubes.
7. Cutter grid circuit open.
8. Incorrect wiring.
9. Inlet tube from valve not in water pan.
1. Bin thermostat out of calibration
2. Bin thermostat contacts stuck shut.
3. Incorrect wiring.
1. Located in cold areas.
2 . Water falling on ice cubes.
3. Bin thermostat out of calibration.
4. Evaporator thermostat set to produce too
thin or too thick ice cubes.
5. Hot gas solenoid stuck partially open.
6. Insufficient refrigeration.
7. Not enough water being circulated over
evaporator plate.
1. Water pan overflowing.
2. Water pump pan out of position.
3. Water inlet tube from water valve not
inserted in water pan.
4. Ice jam on cutter grid causing water to
"bridge" and drip in bin.
5. Water deflector out of position (not
factory installed).
1. High mineral contents in water.
1. Evap thermostat set for thin cubes.
2. Not enough water being circulated over
evaporator.
3. Evap thermostat out of calibration.
Troubleshooting Guide
1. Move to warmer area (above 55° F.)
2. Connect water.
3. Locate and repair.
4. Replace relay.
5. Move switch to "on" position
6. Replace bin thermostat.
7. Replace compressor.
8. Move switch to "ON" position
1. Restore water supply.
2. Check valve parts for restriction; binding or
solenoid coil failure.
3. Recalibrate or replace.
4. Repair or replace solenoid
5. Repair sealed system.
6. Advise customer.
7. Check fuse and other parts of circuit.
8. Check against wiring diagram
9. Insert tube in water pump pan.
1. Recalibrate or replace.
2. Replace thermostat.
3. See Number 8 above.
1. Move to warmer area above 55°F (for best
results 70°F to 90°F)
2. Check water system components for proper
placement.
3. Recalibrate or replace.
4. Move adjusting knob to setting to produce
1/2" x 5/8" cube.
5. Repair or replace solenoid
6. Check and repair sealed system.
7. Check for restriction in water lines. Check
water pump and motor.
1. Check overflow tube for restrictions.
Overflow hose not inserted in bin drain.
Incorrect / worn flow washer in water valve.
2. Install correctly.
3. Locate tube properly-see pictorial drawing of
water system.
4. Check cutter grid circuit. Check for mineral
deposit on evaporator plate (see Category 6
below).
5. Install properly-Kit #702354.
1. See cleaning instructions
1. Turn ice thickness control knob clockwise
until cube of desired thickness is obtained.
2. Check for restriction in water lines - check
water pump motor and distributor tube.
3. Recalibrate or replace..
6-3

TEST / ACTION

#3752200 - Revision B - May, 2006