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B. LED Lights and Audible Alarm Safeties
Beep occurs and red "POWER OK" LED turns on when control switch is moved to "ICE"
position.
Green LEDs 1 through 4 turn on and sequence from initial startup as listed in the table
below. Order of green LEDs from the outer edge of control board is 1, 4, 3, 2.
Sequence Step
1-Minute Fill Cycle
Harvest Cycle
Harvest Pump Time
(harvest assist)
Freeze Cycle
Pump-Out Cycle
*FM energized if on K1 Connector Pin #9;
Type
1
High Evaporator Temp.
Beep
(temperature > 127°F) (53°C)
2
Harvest Backup Timer
Beep
(harvest > 20 min. for two
cycles in a row)
3
Freeze Timer
Beep
(freeze > freeze timer setting
for two cycles in a row)
To reset above safeties, press "ALARM RESET" button with power supply on.
6
Low Voltage
(92Vac±5% or less)
7
High Voltage
(147Vac±5% or more)
Legend: Comp–compressor; FM–fan motor; FMR–fan motor remote; FS–float switch;
HGVs–hot gas valves; HM–headmaster (C.P.R.); LLVs–liquid line valves;
PM–pump motor; TXV–thermostatic expansion valve; WRV–water regulating valve;
WV–inlet water valve
To perform output test, move control switch to "ICE" position. Press "OUTPUT TEST" button.
Correct green LED lighting sequence is 1, 4, 3, 2. Components (e.g., compressor) cycle
during test. Following test, icemaker resumes operation.
Dip switches must be adjusted per unit's service manual or Hoshizaki Technical Support
recommendation. S4 dip switch 8 must remain off.
LED
4
WV
1, 4, 2
Comp, FM*, FMR, HGVs, WV
1, 3, 2
Comp, FM*, FMR, HGVs, PM
1
Comp, FM/FMR, PM, LLVs
1, 4
, 3, 2 Comp, FM*, FMR, HGVs, PM, WV
†
pump-out timer setting
†
Alarm
Sequence
Energized
Components
†
Alarms
Check for harvest problem (stuck HGV or relay), hot water
entering unit, stuck HM, or shorted thermistor.
Check thermistor (open), HGV not opening, TXV or LLV
leaking by, low charge, inefficient Comp, or WRV leaking
by.
Check FS stuck closed (up), WV leaking by, HGV leaking
by, PM not pumping, TXV defective, LLV not opening, low
charge, HM not bypassing, or inefficient Comp.
Red POWER OK LED turns off if voltage protection
operates.
Control voltage safeties automatically reset when voltage
is corrected.
Test
35
Time LEDs are On
Min.
Max.
1 minute
20 minutes
0 seconds 50 seconds
5 minutes
freeze timer
setting
10 seconds 20 seconds
Notes
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