Sub-Zero 700-3 BASE Technical & Service Manual page 91

Integrated
PROBLEM
(Continued)
F. Warm Refrigerator
Temperatures, "SERVICE"
not displayed or Flashing
3 Series
(700- BASE)
POSSIBLE CAUSE
Refrigerator Compartment Fan Fault
a. Fan blade obstructed or out of position
b. Evaporator fan motor disconnected
c. Power to Fan Fault, or Fan Motor
Defective
Compartment Thermistor Disconnected,
Shorted, or misread
Air Baffle Control Fault (700BCI-3 Only)
a. Baffle Control Stuck Closed
b. Baffle Control Disconnected, Defective,
or not Receiving Signal from Control
Board.
Troubleshooting Guides
a. Move obstruction or reposition blade.
b. Check electrical connections & continuity
from control board to motor. Reconnect /
repair bad connections.
c. With light switches depressed, check for
115V AC from control board to fan motor.
Replace control board if defective, or
Replace motor if defective.
Check refrigerator evaporator thermistor
electrical connections from thermistor to
control board. Reconnect / repair connec-
tions. Check resistance of refrigerator evap-
orator thermistor for 30,000 to 33,000 ohms
at 32°F. Replace if defective.
a. Manually open / close air baffle control. If
movement is not smooth, replace baffle con-
trol.
b. With light switches depressed, initiate
Manual Compartment Activation Mode for
refrigerator compartment and observe baffle
operation. If baffle does not open within 3
minutes:
1. Check electrical connections from baffle
control to control board. Reconnect / repair
bad connections.
2. If electrical connections and wiring are
good, and baffle moves freely, replace con-
trol board.
8-9
#3758424 - Revision B - December, 2005
TEST / ACTION
Low Voltage Circuit.
Do NOT apply 115V AC.