Sub-Zero 700TC-3 Service Manual page 105

Integrated
Integrated
PROBLEM
I. Warm Refrigerator
Temperatures with
"SERVICE" Flashing
Pointers:
Refrigerator door must be open
and compressor running for five
minutes.
1. "EE" appears in place of refrig-
erator evap. temperature, see:
• Evaporator thermistor discon-
nected or shorted
2. Evaporator Temp 15°F (-9°C)
or lower within 5 minutes
w/door open, see:
• Door ajar
• Lights stay ON
• Evaporator fan fault
• Compartment or evaporator
thermistor misread
• Evaporator heavily frosted
• Sealed system fault: leak or
partial restriction
3. Evaporator Temp cannot pull
below 30°F (-1°C) within 5
minutes w/door open, see:
• Condenser Air Flow
• Compartment or evaporator
thermistor misread
• Sealed system fault: leak or
inefficient compressor
4. Evaporator Temp 35°F (2°C) or
higher after 5 minutes w/door
open, see:
• Condenser Air Flow
• Power to compressor fault
• Sealed system fault: leak,
restriction or inefficient com-
pressor
NOTE: "Pointers" do not apply to
cabinet initial pulldown from
ambient temperatures.
NOTE: To clear flashing SER-
VICE indicator after repairs,
power OFF, then back ON.
NOTE: To clear non-flashing
SERVICE indicator after repairs,
press door ajar alarm bell
ON/OFF key for 15 seconds.
(Continued)
3
3
(700- T ALL)
(700- T ALL)
POSSIBLE CAUSE
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)
Light ON with Door/ Drawers Closed
a. Top hinge cover missing light switch
b. Faulty light switch
Evaporator Fan Fault
a. Top hinge cover missing fan switch
b. Fan blade obstructed or out of position
c. Faulty fan switch
(NOTE: A compressor must be running)
d. Evaporator. fan motor disconnected
e. Evaporator fan motor defective
(NOTE: A compressor must be running)
Evaporator Thermistor Disconnected or
Shorted
Compartment or Evaporator Thermistor
Misread
8-11
Series
Series Troubleshooting Guides
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.
a. Replace hinge cover.
b. Check operation of light switches, lights off
when switch is depressed. Replace switch if
defective. (NOTE: there are two light switch-
es in the drawer area)
a. Replace hinge cover.
b. Move obstruction or reposition blade.
c. Check for 115V AC to fan switch, depress
fan switch and check for 115V AC from fan
switch. Replace switch if defective. (NOTE:
there are two fan switches in the drawer
area)
d. Check electrical connections of motor.
Reconnect / repair bad connections.
e. Check for 115V AC at fan motor. Replace
motor if defective.
Check refrigerator evaporator thermistor
electrical connections from thermistor to J1
on control board. Reconnect / repair con-
nections. Check resistance of refrigerator
evaporator thermistor for 30,000 to 33,000
ohms at 32°F (0°C). Replace if defective.
Check resistance of refrigerator compart-
ment and evaporator thermistors for 30,000
to 33,000 ohms at 32°F (0°C). Replace if
defective.
#3758412 - Revision B - December, 2006
TEST / ACTION