Sub-Zero 601R-2 Technical & Service Manual page 143

Built-In
Built-In
PROBLEM
H. Warm Freezer Temperatures
without "SERVICE" Flashing
Pointers:
1. "Sr" appears during Diagnostic
Mode, see:
• Unit in Showroom Mode
2. Evap Temp -20°F (-29°C) 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 -19°F
(-28°C) and 0°F (-17°C), see:
• Warm food load
• High room ambient
• Door ajar
• Condenser Air Flow
• Compartment thermistor mis-
read
• Sealed system fault: leak
4. Evaporator Temp 0°F (-17°C)
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 door ajar alarm bell
ON/OFF key for 15 seconds.
(Continued)
Series
Series
2
2
(600- )
(600- )
POSSIBLE CAUSE
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
Condenser Air Flow
a. Dirty condenser
b. Condenser fan blade obstructed or
blade is loose
c. Condenser fan motor disconnected
d. Condenser fan motor defective
e. No power from control board to con-
denser fan (Does not apply to single
compressor models)
(NOTE: A compressor must be running)
Light ON with Door Closed
a. Switch depressor missing or bent, not
depressing light switch
b. Faulty light switch
8-9
Troubleshooting Guides
TEST / ACTION
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. Check and replace hinge if defective.
a. Clean condenser.
b. Remove obstruction or tighten nut on motor
shaft.
c. Check electrical connections from motor to
J7-1 on control board, or from motor to com-
pressor on single compressor models.
Reconnect / repair connections.
d. Check for 115V AC to motor, replace motor
if defective.
e. Check for 115V AC at J7-1 on control board
(with compressor running). Replace board if
defective.
a. Replace/straighten switch depressor.
b. Check operation of light switches, lights off
when switch is depressed. Replace switch if
defective.
#3758407 - Revision B - August, 2006