No Ice, "Ice" Displayed On Lcd, But Not Flashing - Sub-Zero 700-2 Series Service Manual

Troubleshooting Guides
PROBLEM
K. Product Temperature 10° or
More Colder than Displayed
Temperature
L. 1. "Extremely" Cold
Temperatures Displayed
(1° to 7° in Refrigerator and
-21° to -15° in Freezer)
2. If outside US -
"Extremely" Warm
Temperatures Displayed
(34° to 45° in Refrigerator
and -5° to 5° in Freezer)
M. "ICE" and "SERVICE"
Flashing on LCD
N. No Ice, "ICE" Displayed on
LCD, but not Flashing
(NOTE: The Icemaker system
is disabled for 45 minutes after
each harvest.)
(Continued)
#3756780 - Revision D - July, 2005
Integrated (
Integrated (
POSSIBLE CAUSE
Compartment Thermistor Misread
1. Control Set to Display Celsius but
Customer Thought it Was Fahrenheit
2. If Outside US - Control Set to Display
Fahrenheit but Customer Thought it
Was Celsius
Water Valve Energized Longer then
Fifteen Seconds
Unit Has Not Run Long Enough
Warm Freezer Temperatures
(NOTE: Freezer must be 17°F or colder for
icemaker to function)
Shut-off Arm Stuck in Up/Off Position
Disconnected or Defective Water Valve
Frozen Fill Tube
a. Water Supply Problem
b. Disconnected or defective fill tube
heater
c. No power from control board to fill tube
heater
8-18
2) Series
2) Series
700-
700-
TEST / ACTION
Check resistance of compartment thermistor
for 30,000 to 33,000 ohms at 32°F. Replace
if defective.
1. Control set to display Celsius but customer
thought it was Fahrenheit. Switch unit OFF,
then ON, then press & hold Bell key and
UNIT ON/OFF key for 10 seconds.
2. If Outside US - Control set to display
Fahrenheit but customer thought it was
Celsius. Switch unit OFF, then ON, then
press & hold Bell key and UNIT ON/OFF
key for 10 seconds.
Check icemaker area for jammed ice cube,
clear jam if present. Check levelness of ice-
maker; 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
115V AC is applied, closes completely when
115V AC is removed. Water valve Ohms =
160. Replace if defective.
NOTE: Unit must be switched OFF, then
ON to clear flashing ICE & SERVICE.
Freezer must be 17°F for icemaker to oper-
ate, approximately 24 hours after unit instal-
lation. Instruct customer.
See PROBLEM A, B, E, F & G earlier in
Troubleshooting Guide.
Check shut-off arm, if stuck in up/off posi-
tion, correct problem.
Check electrical connections and water con-
nections at water valve, Reconnect / repair
connections.
Check resistance of water valve, 160 ohms.
Replace if defective.
a. Check water supply pressure; must be con-
stant 20-100 PSI. If not, instruct customer.
b. Check electrical connections at fill tube
heater. Reconnect / repair connections.
Check resistance of fill tube heater, 2300 -
2900 Ohms. Replace if defective.
c. Check for 115V AC at J7-3 on control board.
Replace board if defective.