Sub-Zero 700 Series Service & Parts Manual page 65

Complaint
Lighting inoperative
(continued).
CAUTION! Low volt-
age. DO NOT apply 115
volts.
GENERAL TROUBLESHOOTING GUIDE
Possible Cause
Poor door closing
700TR, 700TC/I, 700TF/I only.
1. Food obstructing door closing.
2. Door hinge binding, door not clos-
ing.
Poor drawer reed switch operation.
1. Reed switch stuck closed.
CAUTION! Low voltage.
DO NOT apply 115 volts.
2. Reed switch unplugged or faulty.
Upper control panel assy.
component malfunction
700TR, 700TC/I, 700TF/I only.
1. Thermal cut-out faulty.
2. Interlock switch faulty.
Light transformer malfunction.
1. Transformer primary winding
faulty.
2. Transformer secondary winding
faulty.
1. Remove obstruction.
2. See DOOR CLOSING CHECK AND
REPAIR at end of Troubleshooting
Guide.
1. Verify that reed switch actuator extends
forward when drawer opens, if not,
replace reed switch assy.
2. With door shut and reed switches
depressed, check resistance of harness
at P2 of control panel. If open, repair
wiring or replace reed switch assy.
1. Cut power at master power switch.
Then, at upper control panel, check
resistance across thermal cut-out. If
open, replace upper control panel assy.
NOTE: Thermal cut-out must be cool.
2. Cut power at master power switch.
Then, at upper control panel, check
resistance across interlock switch while
interlock switch depressed. If open,
replace upper control panel assy.
1. Cut power at master power switch.
Then check resistance across orange
and white wires at P7 & P5. If open,
repair wiring or replace transformer and
control board.
2. 700TR, 700TC/I, 700TF/I only. Restore
power to unit and check the transformer
secondary winding for 15V across P11
and the pink wire in the control board
area. If no 15V, repair wiring or replace
transformer.
5-5
AIR FLOW
Correction