© 2010 Viking Preferred Service
18
Diagnostics
Cooling Diagnostics Service Tests (cont.)
Step 6–Defrost Heater/Bi-metal
Line voltage switched to components from board. Verify 120 VAC between line and neutral at heater. Under
some conditions, the Bi-metal can take a few minutes to close the circuit. If Bi-metal is opened it will need to
be by-passed for heater to operate.
Unit gets a valid
Bi-metal closed
Bi-metal open
reading
Note:
If Bi-metal is by-passed for testing, do not overheat evaporator area.
Step 7–Defrost Mode
The defrost mode can be set using the RC Temp increase button. In ADC Mode the product will automatically
defrost after a minimum of 8 hours of compressor run time and up to a maximum of 96 hours of compressor
run time, depending on product usage. In Basic Mode the unit will automatically defrost after 8 hours of
compressor runtime. The defrost mode must be set to ADC On before exiting the Service Diagnostic Mode.
ADC On
Basic Mode On
(8 hr timer)
Dispensing Diagnostics Service Tests
Step 8–All User Interface indicators
Verify that all LED indicators and UI display digits turn on automatically.
All Indicators On
0 1
0 2
0 6
Press Both
to activate
0 1
0 7
Press Both
to activate
0 2
0 8
Press Both
to activate
-88
Press Both
to activate
Holiday Mode
Press &
Hold
to Reset
Press
&
Hold
Good
Order
Replace
–
+
–
–+
SET
˚F / ˚C
CANCEL
0˚ F Recommended Settings 37˚F
COOLING OFFON
˚
E
88
˚
E
-18˚C
3˚C
Freezer
Refrigerator
8
s
8
s
Door Open
Dim