Sub-Zero 700TC-3 Service Manual page 106

Troubleshooting Guides
PROBLEM
(Continued)
I. Warm Refrigerator
Temperatures with
"SERVICE" Flashing
(See Pointers on previous page)
J. Warm Refrigerator
Temperatures without
"SERVICE" Flashing
Pointers:
Refrigerator door must be open
and compressor running for five
minutes.
1. "Sr" appears during Diagnostic
Mode, see:
• Unit in Showroom Mode
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:
• Warm food load
• High room ambient
• Door ajar
• 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
(Continued)
(See NOTES on next page)
#3758412 - Revision B - December, 2006
Integrated
Integrated
POSSIBLE CAUSE
Evaporator Heavily Frosted
a. Door or drawer ajar
b. Evaporator fan fault
c. Thermistor misread
Power to Compressor Fault
NOTE: For 700TF/I-3, see Error Code
Troubleshooting Guide
Sealed System Fault
• Sealed System Leak
• Sealed System Restriction
• Inefficient Compressor
No Power to Unit
Unit Switched OFF
Unit in Show Room Mode
Control Set Too High
Warm Food Load
High Room Ambient
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)
8-12
3
3 Series
Series
(700- T ALL)
(700- T ALL)
TEST / ACTION
a. See Door or Drawer Ajar above.
b. See Evaporator Fan Fault above.
c. See Thermistor Misread above.
Check for 115V AC at E7 and/or E6 on con-
trol board. Replace control board if defec-
tive.
See Sealed System Troubleshooting Guide
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
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.