Control Board Timers - Koolaire STH045 8/15 Technician's Handbook

CONTROL BOARD TIMERS

• The ice machine is locked into the freeze cycle for
6 minutes before a harvest cycle can be initiated.
The freeze time lock in feature is bypassed on the
initial cycle (manual start or after a full bin/safety
limit condition). 
During the initial cycle, if the Harvest float Switch is
in the down position for 10 continuous seconds
during the start of a freeze cycle, a harvest
sequence is initiated. In all subsequent cycles if
the harvest float switch is in the down position for
10 continuous seconds a safety limit 1 will be
indicated.
• The maximum freeze time is 60 minutes at which
time the control board automatically initiates a
harvest sequence.
• The maximum harvest time is 3.5 minutes. The
control board automatically initiates a freeze
sequence when these times are exceeded.
• The ice machine will continue to fill with water for
up to six minutes, or until the high water float
opens for 5 continuous seconds. The control board
will energize the water inlet valve one more time 3
minutes into the freeze cycle.Safety Limits
Safety limits are stored and indicated by the control
board. The number of cycles required to stop the ice
machine varies for each safety limit.
Safety limits can be reset by cycling the toggle switch
Off/On and starting a new ice making cycle.
A safety limit is indicated by a flashing light on the
control board.
Safety Limit 1
If the freeze time reaches 60 minutes, the control
board automatically initiates a harvest cycle.
• After 3 consecutive 60 minute cycles control board
light SL#1 light will flash on/off at 1 second
intervals.
• If 6 consecutive 60-minute freeze cycles occur, the
ice machine stops and the SL#1 light on the
control board will be on continuously.
46 Part Number STH045 8/15