Sub-Zero 700TC-3 Service Manual page 108

Troubleshooting Guides
PROBLEM
K. Warm or Normal
Temperatures in Both
Compartments with
"SERVICE" Flashing
L. Warm Temperatures in Both
Compartments without
"SERVICE" Flashing
(Continued)
#3758412 - Revision B - December, 2006
Integrated
Integrated
POSSIBLE CAUSE
High Room Ambient
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)
Refrigerator Evaporator Thermistor
Disconnected or Shorted
No Power to Unit
Unit Switched OFF
Unit in Showroom Mode
Control Set Too High
Warm Food Load
High Room Ambient
Door Ajar
a. Food product obstruction
b. Door/cabinet hinge problem
c. Drawer closer tripped backwards
8-14
3
3 Series
Series
(700- T ALL)
(700- T ALL)
TEST / ACTION
Instruct customer unit performs best
between 60°F(16°C) and 90°F(32°C).
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.
Initiate Diagnostic Mode. If "EE" appears in
place of refrigerator evap temp, check refrig-
erator evaporator thermistor electrical con-
nections from thermistor to J1 on control
board. Reconnect / repair connections.
Check resistance of refrigerator evaporator
thermistor for 30,000 to 33,000 ohms at
32°F (0°C). Replace if defective.
Check power to unit, plug unit in or switch
supply circuit breaker ON.
Check for "OFF" displayed at LCD. If off,
press UNIT ON/OFF key.
Press UNIT ON/OFF key to OFF, then press
and hold WARMER& COLDER keys, and
press UNIT ON/OFF key.
Check set-point. If high, adjust.
Check contents of freezer for warm food
load. Instruct customer.
Instruct customer unit performs best
between 60°F(16°C) and 90°F(32°C).
a. Move obstruction.
b. See Door Hinge Operation Test Procedures
later in this section. Replace hinge if defec-
tive.
c. Trip drawer closer forward