Page 10
6-10
PROBLEM
POSSIBLE CAUSE
TEST / ACTION
#7031933 - Revision A - April, 2015
Troubleshooting Guides
MODEL 424
MODEL 424
(SWS #3227000)
(SWS #3227000)
C. WARM TEMPERATURE IN
ONLY ONE WINE STORAGE
COMPARTMENT
Control Set Too Warm
Unit Recently Energized
Unit Recently Stocked with Wine
High Room Ambient
Door Ajar
a. Wine Rack Obstruction
b. Door out of Adjustment
c. Door or Cabinet Hinge Problem
Thermistor Fault
a. Evaporator Thermistor Location
b. Evaporator Thermistor Wiring /
Connections problem
c. Evaporator or Compartment
Thermistor Misread
Condenser Air Flow / Fan Fault
a. Dirty Condenser
b. Fan Blade Loose, or Obstructed
c. Fan Motor Disconnected or
Malfunctioning
Evaporator Fan / Fan Circuit Fault
a. Fan Blade out of Position or
Obstructed
b. Fan Motor Disconnected or
Malfunctioning
Refrigerant Valve Fault
a. Solenoid Disconnected, Mis-Wired, or
defective
b. Refrigerant Valve Stuck
Check/adjust set-points.
Allow time for unit to pull down
Instruct customer
Instruct Customer that unit performs best
between 60°F / 16°C - 90°F / 32°C
a. Adjust wine rack
b. See Door Adjustment procedure in section
2 of this manual.
c. Check hinges. Replace if defective.
a. Move to correct location.
b. Initiate Diagnostic Mode. If “EE” is dis-
played in place of evap temp, check elec-
trical connections back to J2 on control
board. Repair wiring or connections.
c. Check thermistor ohms = 30,000 - 33,000
at 32°F (0°C). Replace if defective.
a. Check/clean condenser.
b. Tighten blade or move obstruction.
c. Check fan motor operation. Check fan
motor electrical connections back to com-
pressor. Check for power from fan motor
to compressor. Reconnect or repair wires,
or replace motor if defective.
a. Check fan blade position. Reposition
blade or move obstructions.
b. Check fan motor electrical connections.
Check power to motor. Repair connec-
tions, replace motor if defective.
a. Initiate Manual Valve Activation Mode.
1. If valve inoperative:
a. Check electrical connections.
b. Check solenoid resistance for 295
± 10% ohms. Replace if defective.
2. Toggle through temp readings, if oppo-
site evap temp drops, switch electrical
connections.
b. Initiate Manual Valve Activation Mode for
one side, then the other, while observing
evap temps. If only one side of valve acti-
vates, replace valve.
