Service manual

44
Installation and Service Manual
TROUBLESHOOTING
PROBLEM ANALYSIS GUIDE - 3 RELAY BOARD
Problem
Cuber not operating
A) Indicator lights "off" - no power
to circuit board
B) Indicator lights "off" - power to
circuit board
Cause
Toggle switch in center "off" position
Toggle switch
Thermo-disc open
High pressure cut-out open -
won't reset
No target on curtain
Target not in proximity switch field
No curtain movement
Fuse blown on circuit board (8 amp)
Faulty proximity switch
Unit off because bin is full
Corrective Action
Place switch in "on" position
Test - if bad, replace
Test - replace if won't reset auto-
matically - determine reason for
open switch
Depress manual reset -
determine cause:
Water supply shut-off, water pres-
sure too low, water valve defec-
tive or out of adjustment, water
condenser dirty or corroded, unit
overcharged, cut-out defective.
Replace target
Water curtain drifting out of switch
range - reduce clearance between
curtain and proximity switch
Adjust proximity switch
Replace fuse
Replace proximity switch
Remove ice from door - eliminate
curtain hang up