Led Lights And Audible Alarm Safeties; Ice Purge Cycle Bypass - Hoshizaki Modular Cubelet Serenity Series Service Manual

2. LED Lights and Audible Alarm Safeties

At startup, CB green "POWER OK" LED turns on immediately to indicate proper control
voltage and will remain on unless a control voltage problem occurs. For further details,
see "II.B. Service Diagnosis."
Sequence Step
Fill Cycle
Ice Purge Cycle
Freeze Cycle (with refill)
1-in-1 Drain Cycle
(S1 dip switch 4 off)
1-in-12 Drain Cycle
(S1 dip switch 4 on)
The built-in safeties shut down the unit and have alarms as listed below.
No. of Beeps
(every 5 sec.)
1 Low Water Safety (FT)
UFS open > 90 sec. after WV energized.
2 Control Switch
In "DRAIN" position longer than 15 min..
3 High-Pressure Switch:
First and second activation in 1 hr.
4 High-Pressure Switch:
Third activation in 1 hr.
5 Freeze Timer (FZT)
WV off > 30 min. since last WV activation.
6 Low Voltage
(92VAC±5% or less)
7 High Voltage
(147VAC±5% or more)
8 Gear Motor
CCR contacts fail to close.
9 BC1 (infrared sensor) fails (CB S1 dip switch
7 on)
BC2 (mechanical backup) spout cover
magnet disengaged.
Legend: BC1–bin control (infrared sensor); BC2–bin control (mechanical backup);
CB–control board; CCR–compressor control relay; Comp–compressor;
DV–drain valve; EH–evaporator heater; FMR–fan motor(s)-remote; FT–fill timer
(90-sec. low water safety timer); FZT–freeze timer (30-min. freeze safety timer);
GM–gear motor; PDS-pump-down solenoid valve; WV–inlet water valve

3. Ice Purge Cycle Bypass

To speed up the diagnostic process, the 5-min. ice purge cycle may be bypassed
by pressing the "SERVICE" button on the control board after the gear motor starts.
WARNING! Risk of electric shock. Care should be taken not to touch live terminals.
Energized
LED
Components
WTRIN WV
GM GM, EH
GM, COMP, GM, EH, PDS, Comp,
WTRIN* (refill) FMR, WV* (refill)
FLUSH (Drain) DV, Comp, GM, EH,
GM, COMP PDS, FMR (only if BC
(only if BC not not satisfied)
satisfied)
FLUSH (Drain) DV
Type of Alarm
Min.
-
5 min.
-
2 sec.
10 min.
Reset Options
Automatic reset once water supply is restored
and UFS closes.
Automatic reset once the control switch is
moved to the "ICE" position.
Automatic reset once pressure drops
below the high pressure threshold and the
high-pressure switch closes.
Call for service. To avoid possible
catastrophic failure, it is recommended to
leave the icemaker off until this alarm is
resolved. Manual reset. Turn power off and
on again.
Manual reset. Turn power off and on again.
CB green "POWER OK" LED turns off if
voltage protection operates.
The control voltage safeties automatically reset
when voltage is corrected.
Manual reset. Turn power off and on again.
Manual reset. Turn power off and on again.
38
Max.
-
5 min.
*On until UFS closes. Alarm
sounds after 90 sec.
2 sec.
10 min.