Monitor Icemaker System And Display If Service Is Needed - Sub-Zero Wolf BI Series Service Manual

Electronic Control

Monitor Icemaker System and Display If Service is Needed

During an ice production cycle, the microprocessor observes the power supplied to the water valve solenoids. If a
solenoid is energized for more than thirty-five (35) seconds, power to the icemaker system is disabled for twenty-four
(24) hours (See Figure 2-48), and the appropriate fault code is logged. If this happens five consecutive times, the
ICE icon and service icon in the LCD will flash (See Figure 2-49), and the icemaker system will remain disabled, to
include the ICE MAKER key, until the problem is corrected and the fault indicator and fault code is cleared.
NOTES:
• To clear the icemaker fault indicator and reactivate the icemaker system, the problem must be corrected, then the
ALARM key must be touched for fifteen (15) seconds to clear the fault code.
• To allow ice to freeze fully and reduce effects of low water pressure, power to the ice maker system is interrupted
for forty-five (45) minutes after each ice harvest. This can be bypassed for service purposes by switching the ice-
maker system OFF, then back ON with the ICE MAKER key.
• Power to the freez-
er lights is moni-
tored to help con-
trol icemaker oper-
ation. If the freezer
door is open,
power to the ice
maker system is
interrupted, unless
the icemaker is fill-
ing with water at
that time. After the
door is closed,
power is not
allowed to the ice
maker system for
an additional three
(3) minutes.
• When in Sabbath
Mode, the ice
maker system is
disabled.
LIGHTS ICE MAKER MAX ICE
Figure 2-49. Service Icon and Ice Cube Icon Flashing = Service Needed on Ice Maker System
7040317 - Revision A - September, 2015
Built-In (BI) Series
Built-In (BI) Series
HIGH VOLTAGE






1 NEUTRAL
4 L1
6 L1
1 MAIN LIGHTS
3 COMP 1
5 COMP 2
8 DEFROST HTR
9
1
6
1

Power to valve solenoids monitored; if supplied
longer than 35 seconds, power to icemaker system
is disabled for 24 hours; if this happens 5 consecu-
tive times, power is disabled until problem is fixed
Figure 2-48. Signal Trace Schematic: Icemaker Electrical System
COLDER WARMER










 

 








COLDER
2-32
(SWS #4380000)
(SWS #4380000)


660 Ω

160 Ω










2300-2900 Ω

27.9-30.9 Ω




WARMER PURE AIR ALARM
















POWER