Sub-Zero ICB700 T Series Troubleshooting Manual page 8

International Integrated
International Integrated
PROBLEM
H. Warm Freezer Temperatures
without "SERVICE" Flashing
Pointers:
1. "Sr" appears during Diagnostic
Mode, see:
• Unit in Showroom Mode
2. Evap Temp -29°C (-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. Evap Temp between -28°C
(-19°F) and -17°C (0°F), see:
• Warm food load
• High room ambient
• Door ajar
• Condenser Air Flow
• Compartment thermistor mis-
read
• Sealed system fault: leak
4. Evaporator Temp -17°C (0°F)
or higher, see:
• Power to compressor fault
• Sealed system Fault: leak,
restriction, inefficient compres-
sor
NOTE: "Pointers" do not apply to
cabinet initial pulldown from
ambient temperatures.
NOTE: To clear non-flashing
SERVICE indicator after repairs,
press ALARM key for 15 sec-
onds.
(Continued)
(ICB700 T
(ICB700 T
POSSIBLE CAUSE
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
(ICB700TC/I & ICB700TR only)
f. Power from compressor controller fault
(ICB700TF/I only)
Lights ON with Door/ Drawers Closed
a. Top hinge cover missing, not depress-
ing light switch
b. Faulty light switch
Series
Series
all)
all)
Check power to unit, plug unit in or switch
supply circuit breaker ON.
Check for "OFF" displayed at LCD. If off,
press POWER key.
Press POWER key to OFF, then press and
hold WARMER& COLDER keys, and press
POWER key.
Check set-point. If high, adjust.
Check contents of freezer for warm food
load. Instruct customer.
Instruct customer unit performs best
between 16°C (60°F) and 32°C (90°F).
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 ICB700TC/I & ICB700TR, from
motor to compressor controller on
ICB700TF/I. Reconnect / repair wiring or
connections.
d. Check for 230V AC to motor, replace motor
if defective.
e. With compressor running, check for 230V
AC at control board (J7-1 on ICB700TC/I &
ICB700TR). Replace board if defective.
f. With compressor running, check for 230V
AC from controller (ICB700TF/I 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.
es in the drawer area)
8-9
Troubleshooting Guides
TEST / ACTION
(NOTE: there are two light switch-
7005836 - Revision A - January, 2009