Icemaker Produces Too Much Ice; Icemaker Produces Hollow Cubes; Icemaker Produces Small Cubes; Water Or Clump Of Ice In Ice Bucket - Sub-Zero UC-24 series Service Manual

Under Counter (UC-24) Series
PROBLEM
L. Icemaker produces Too
much ice
M. Icemaker Produces Hollow
Cubes
N. Icemaker Produces Small
cubes
O. Water or Clump of Ice in Ice
Bucket
P. No LCD
POSSIBLE CAUSE
Ice Level Arm/Linkage Bent or Broken
Icemaker Faulty
Freezer Too Cold, Cycles Icemaker Too
Soon
Not Enough Thermal-Mastic on
Icemaker Thermostat
Icemaker Thermostat Fault
Water Supply Problem
Icemaker Not Level
Low Fill Adjustment on Icemaker
Icemaker Not Level
High Fill Adjustment on Icemaker
Water Valve Energized Too Long
Intermittent Warm Freezer Temperatures
Unit in Sabbath Mode
Display Wire Harness Disconnected or
Faulty
Control Panel Assembly Defective (OR)
No Signal Read at Control Board
8-13
Troubleshooting Guides
TEST / ACTION
Inspect ice level / shut-off arm. Replace
defective parts.
With ice level arm in UP/OFF position,
manually start icemaker with jumper
between ports "T" & "H". If icemaker motor
starts with arm in the UP/OFF position,
replace icemaker.
See PROBLEM "H" earlier in
Troubleshooting Guide.
Inspect icemaker thermostat, apply more
Thermal-Mastic to thermostat.
Replace Thermostat.
Check water supply pressure; must be con-
stant 20-100 PSI. If not, instruct customer.
Check level of icemaker, adjust if needed
Check for 100-110 cc. fill (3.5-3.75 oz.). If
low, increase fill by turning adjusting screw
counterclockwise.
Check level of icemaker, level if needed.
Check for 100-110 cc. fill (3.5-3.75 oz.).
Turn adjusting screw clockwise to decrease.
• Check icemaker for jammed ice cube, clear
jam if present.
• Check icemaker levelness; level if needed.
• Check position of fill cup. Reposition if in
ice path.
• Check water supply pressure; must be con-
stant 20-100 PSI. If not, instruct customer.
• Check water valve operation, opens when
AC Voltage is applied, closes completely
when AC Voltage is removed. Water valve
Ohms = 160. Replace if defective.
See PROBLEM A, C, D, E, & H earlier in
Troubleshooting Guide.
Exit Sabbath Mode.
Check display wire harness and connec-
tions. Reconnect, repair, replace bad
wiring.
See Membrane Switch/Ribbon Cable Test
Procedures. If membrane switch fails any
test, replace entire control panel assembly.
If switch passes all tests, replace control
board.
#7003933 - Revision B - November, 2007