Service Manual

3
CONTENTS
Important Safety Information ................................................................................................. 5
I. Construction and Water/Refrigeration Circuit Diagram ....................................................... 7
A. Construction .................................................................................................................. 7
B. Icemaking Unit .............................................................................................................. 8
C. Water/Refrigeration Circuit Diagram .............................................................................. 9
II. Sequence of Operation and Service Diagnosis ............................................................... 10
A. Sequence of Operation Flow Chart ............................................................................. 10
1. Icemaking and Drain Cycle .................................................................................... 10
2. Shutdown ...............................................................................................................11
B. Service Diagnosis ....................................................................................................... 12
1. Ice Production Check ............................................................................................. 12
2. Diagnostic Procedure............................................................................................. 13
C. Control Board Check ................................................................................................... 18
D. Bin Control Check ....................................................................................................... 22
E. Float Switch Check and Cleaning ............................................................................... 24
F. Diagnostic Tables ......................................................................................................... 26
III. Controls and Adjustments ............................................................................................... 28
A. Control Board .............................................................................................................. 28
1. Control Board Layout Shown: ................................................................................. 29
2. LED Lights and Audible Alarm Safeties ................................................................. 30
3. Ice Purge Cycle Bypass ......................................................................................... 31
B. Controls and Adjustments ........................................................................................... 31
1. Default Dip Switch Settings .................................................................................... 31
2. Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, 3) ....................................... 32
3. Drain Frequency Control (S1 dip switch 4) ............................................................ 32
4. Continuous Dispensing Timer (S1 dip switch 5 & 6) ............................................. 32
5. Bin Control Selector (S1 dip switch 7) ................................................................... 33
6a. Mechanical Shutdown Delay (S1 dip switch 8) Auxiliary Code E-0: .................... 33
6b. Agitation and Ice Purge Timer (S1 dip switch 8) Auxiliary Code F-0 and Later: ... 33
7. Mechanical Shutdown Delay (S1 dip switch 9) Auxiliary Code F-0 and Later ........ 34
8a. Factory Use (S1 Dip Switch 9 & 10) Auxiliary Code E-0 ...................................... 34
8b. Factory Use (S1 Dip Switch 10) Auxiliary Code F-0 and Later ............................. 34
C. Power Switch and Control Switch ................................................................................ 35
IMPORTANT
This manual should be read carefully before the appliance is serviced. Read
the warnings and guidelines contained in this manual carefully as they provide
essential information for the continued safe use, service, and maintenance of the
appliance. Retain this manual for any further reference that may be necessary.