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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
1-Minute Fill Cycle
Harvest Cycle
Harvest Pump Timer
Freeze Cycle
Pump-Out Cycle
The built in safeties shut down the icemaker and have alarms as listed below.
No. of Beeps
(every 3 sec.)
1
High Evaporator Temp.
(temperature > 127°F (53°C))
2
Harvest Backup Timer
(harvest > 20 min. for two cycles
in a row)
3
Freeze Timer
(freeze > specified setting for
two cycles in a row)
Timer is factory set using S4 dip
switch 9 & 10
To reset the above safeties, press the "ALARM RESET" button with the power supply on.
6
Low Voltage
(92Vac±5% or less)
7
High Voltage
(147Vac±5% or more)
Legend: Comp–compressor; DV–drain valve; FMRs–fan motors-remote;
F/S–float switch; HGVs–hot gas valves; HM–headmaster (C.P.R.);
LLVs–liquid line valves; PM–pump motor; TXVs–thermostatic expansion
valves; WV1–fill/refill water valve; WV2–harvest water valve
Energized
LED
Components
4
WV1
1, 4, 2
Comp, FMRs
WV2, HGVs
1, 3, 2
Comp, FMRs,
PM, HGVs
1 (and 4 for first
Comp, FMRs,
1 min.)
PM, LLVs
(WV1 for first 1
min.)
1, 3, 2
Comp, FMRs,
PM, HGVs, DV
Type of Alarm
Time LEDs are On
Min.
2 minutes
20 minutes
0 seconds
50 seconds
5 minutes
freeze timer
setting
10 seconds
20 seconds
Check for harvest problem (stuck HGVs or relay), hot
water entering icemaker, stuck HM, or shorted thermistor.
Check for open thermistor, HGVs not opening, TXVs or
LLVs leaking by, low charge, or inefficient Comp.
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.
Red LED will turn off if voltage protection operates.
The control voltage safeties automatically reset when
voltage is corrected.
18
Max.
Avg.
1 minute
3 to 5 minutes
harvest pump
timer setting
30 to 35 minutes
Notes
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