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2. LED Lights and Audible Alarm Safeties
At startup, a 5-second delay occurs while the control board conducts an internal timer
check. A beep occurs when the control switch is moved to the "ICE" position. The red
LED indicates proper control voltage and remains on unless a control voltage problem
occurs. The green LEDs 1 through 4 energize and sequence from initial startup as listed
in the table below. Note that the order of the LEDs from the outer edge of the control
board is 1, 4, 3, 2. For details, see "II.B. Sequence of Operation."
Sequence Step LED
Energized
Components
Time LEDs are On
Min. Max. Avg.
1-Minute Fill Cycle 4 WV1 1 minute
Harvest Cycle 1, 4, 2 Comp, FMRs
WV2, HGVs
2 minutes 20 minutes 3 to 5 minutes
Harvest Pump Timer 1, 3, 2 Comp, FMRs,
PM, HGVs
0 seconds 50 seconds harvest pump
timer setting
Freeze Cycle 1 (and 4 for rst
1 min.)
Comp, FMRs,
PM, LLVs
(WV1 for rst 1
min.)
5 minutes freeze timer
setting
30 to 35 minutes
Pump-Out Cycle 1, 3, 2 Comp, FMRs,
PM, HGVs, DV
10 seconds 20 seconds
The built in safeties shut down the icemaker and have alarms as listed below.
No. of Beeps
(every 3 sec.)
Type of Alarm Notes
1 High Evaporator Temp.
(temperature > 127°F (53°C))
Check for harvest problem (stuck HGVs or relay), hot
water entering icemaker, stuck HM, or shorted thermistor.
2 Harvest Backup Timer
(harvest > 20 min. for two cycles
in a row)
Check for open thermistor, HGVs not opening, TXVs or
LLVs leaking by, low charge, or inefficient Comp.
3 Freeze Timer
(freeze > specied setting for
two cycles in a row)
Timer is factory set using S4 dip
switch 9 & 10
Check for a F/S stuck closed (up), WV1 or WV2 leaking
by, HGVs leaking by, PM not pumping, TXVs not
feeding properly, LLVs not opening, low charge, HM not
bypassing, or inefficient compressor.
To reset the above safeties, press the "ALARM RESET" button with the power supply on.
6 Low Voltage
(92Vac±5% or less)
Red LED will turn off if voltage protection operates.
The control voltage safeties automatically reset when
voltage is corrected.
7 High Voltage
(147Vac±5% or more)
Legend: Comp–compressor; DV–drain valve; FMRs–fan motors-remote;
F/S–oat switch; HGVs–hot gas valves; HM–headmaster (C.P.R.);
LLVs–liquid line valves; PM–pump motor; TXVs–thermostatic expansion
valves; WV1–ll/rell water valve; WV2–harvest water valve