Sub-Zero 700TC-3, Service Manual

Page: 101 / 136

Integrated
Integrated
(700-
(700-
3
3
T
T
ALL)
ALL)
Series
Series Troubleshooting Guides
8-7
#3758412 - Revision B - December, 2006
PROBLEM POSSIBLE CAUSE TEST / ACTION
A. Error Codes & “SERVICE”
Flashing
B. “EE” Displayed in Place of
Freezer Temperature with
“SERVICE” Flashing
C. “EE” Displayed in place of
Refrigerator Temperature
with “SERVICE” Flashing
D. Warm or Normal Temp’s
Displayed with “SERVICE”
Alone Flashing
E. Warm or Normal
Temperatures Displayed with
non-flashing “SERVICE”
Displayed
F. Erratic Temperatures with or
without “SERVICE” Flashing
G. Warm Freezer Temperature
with “SERVICE” Flashing
Pointers:
1. Evap Temp -20°F (-29°C) or
lower, see:
• Door ajar
• Lights ON w/door closed
• Evaporator fan fault
• Compartment thermistor mis-
read
• Evaporator heavily frosted
• Sealed system fault: leak or
partial restriction
2. Evap Temp between -19°F
(-28°C) and 0°F (-17°C), see:
• Condenser Air Flow
• Compartment thermistor mis-
read
• Sealed system fault: leak
3. Evaporator Temp higher than
0°F (-17°C), see:
• Power to compressor fault
• Sealed system Fault: leak,
restriction, inefficient compres-
sor
(Continued)
(See NOTES on next page)
Unit Experienced Temperature Problems
Freezer Compartment Thermistor
Disconnected, Shorted, or Misread
Refrigerator Compartment Thermistor
Disconnected, Shorted, or Misread
Unit Experienced Temperature Problems
Refrigerator Evaporator Thermistor
Disconnected, Shorted, or Misread
Error Codes Observed in Diagnostic
Mode, but not Cleared from Memory
Control Board Configured for Wrong
Model
Door or Drawer Ajar
a. Food product obstruction
b. Door/cabinet hinge problem
c. Drawer closer tripped backwards
Condenser Air Flow
a. Dirty condenser
b. Condenser fan blade obstructed or
loose
c. Condenser fan motor disconnected
d. Condenser fan motor defective
e. Power from control board fault
(700TC/I-3 & 700TR-3 only)
f. Power from compressor controller fault
(700TF/I-3 only)
See Error Code Troubleshooting Guide
Check wiring from thermistor to control
board. Reconnect/repair connections.
Resistance of thermistor = 30,000-33,000
ohms at 32°F (0°C). Replace if defective.
Check wiring from thermistor to control
board. Reconnect/repair connections.
Resistance of thermistor = 30,000-33,000
ohms at 32°F (0°C). Replace if defective.
See Error Code Troubleshooting Guide
Check wiring from thermistor to control
board. Reconnect/repair connections.
Resistance of thermistor = 30,000-33,000
ohms at 32°F (0°C). Replace if defective.
Enter diagnostic mode to observe error
codes. See Error Code Troubleshooting
Guide. Verify unit was repaired for error
codes displayed. Press and hold alarm key
for 15 seconds to clear error codes.
If possible, reconfigure to correct model. If
not possible, replace control board.
a. Move obstruction.
b. See Door Hinge Operation Test Procedures
later in this section. Replace hinge if defec-
tive.
c. Trip drawer closer forward
a. Clean condenser.
b. Remove obstruction or tighten nut on motor
shaft.
c. Check continuity from motor to control board
(J7-1) on 700TC/I-3 & 700TR-3, from motor
to compressor controller on 700TF/I-3.
Reconnect / repair wiring or connections.
d. Check for 115V AC to motor, replace motor
if defective.
e. With compressor running, check for 115V
AC at control board (J7-1 on 700TC/I-3 &
700TR-3). Replace board if defective.
f. With compressor running, check for 115V
AC from controller (700TF/I-3 only).
Replace compressor controller if defective.