Scotsman CME1202 - Manual (Page 24)

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 26.
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, recover, 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, recover, 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
CME1202 & CME1402
January 1995
Page 24