SERVICE DIAGNOSIS: Electrical and/or Adjustments
SYMPTOM
POSSIBLE CAUSE
PROBABLE FIX
Nothing operates
Bin level control holding machine off
Bin is full - use some ice.
Check ice level control circuit, see
page 22.
No Power
Reconnect power
High pressure control open
Reset, check machine
High temperature cut out open
Hot gas valve leaks thru, replace
P. C. Board Open
Replace board
Master switch open
Test/replace
Timer contacts open
Replace timer
Makes thick ice/freezes up
Harvest cycle too short
Adjust timer
Water inlet valve restricted
Clean or replace valve
Low water pressure
Check water filter or supply
Hot gas valve defective
Replace hot gas valve
Water reg. valve (water cooled) leaks
through
Replace water reg. valve
Low refrigerant charge
Locate leak, repair, replace drier,
evacuate and weigh in nameplate
charge.
Air intake temperature too high (air
cooled)
Reduce room temperature
Sump covers out of position
Re-position sump covers
Cubes too small
Adjust cube size
Cube size control stuck open
Replace cube size control
Runs, makes no ice
Pump problem or water leak in
reservoir
Check water system and pump
Water inlet valve either lets in no
water or leaks through
Replace inlet water valve
Low refrigerant charge
Locate leak, repair, replace drier,
evacuate and weigh in nameplate
charge.
Timer stuck
Replace timer
Relay does not energize; unit stuck in
harvest
Replace relay
Long freeze cycle
Water inlet valve leaks through
Replace inlet water valve
Dirty condenser
Clean condenser
Air intake temp. too high
Reduce room temperature
Water temperature too high
Advise user
Cubes too small
Cube size set wrong
adjust cube size
Cubes size control stuck closed
Replace cube size control
Cubes too large
Water inlet valve leaks through
Replace inlet water valve and adjust
cube size control
CMS1202
September 1993
Page 20
