Sub-Zero 700-2 Series

Page 117
Troubleshooting Guides
Integrated (
Integrated (
700-
700-
2) Series
2) Series
8-11
#3756780 - Revision D - July, 2005
PROBLEM POSSIBLE CAUSE TEST / ACTION
B.) Warm Freezer Temperatures
without “SERVICE” Flashing
Pointers:
Verify freezer comp is running &
unit is not in defrost, then initiate
Diagnostic Mode and observe
freezer evaporator temperature.
1. “Sr” appears during Diagnostic
Mode, see:
• Unit in Showroom Mode
2 Evaporator temp -20°F 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
3. Evaporator. Temp. between
-19°F & 10°F, see:
• Warm food load
• High room ambient
• Door or drawer ajar
• Condenser air flow
• Sealed system fault, leak
4. Evaporator. Temp. 20°F or
higher, see:
• 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.)
(Continued)
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-2 & 700TR-2 only)
f. Power from compressor controller fault
(700TF/I-2V only)
Lights ON with Door/ Drawers Closed
a. Top hinge cover missing, not depress-
ing light switch
b. Faulty light switch
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-2 & 700TR-2, from motor
to compressor on 700TF/I-2, or from motor
to compressor controller on 700TF/I-2V .
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-2 &
700TR-2). Replace board if defective.
f. With compressor running, check for 115V
AC from controller (700TF/I-2V 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)