Hoshizaki F-500BAJ Service Manual page 31

2. LED Lights and Audible Alarm Safeties
The "POWER OK" LED indicates proper control voltage and will remain on unless a
control voltage problem occurs. For further details, see "II.A. Sequence of Operation Flow
Chart."
Sequence Step
Fill Cycle
Ice Purge Cycle
Freeze Cycle (with refill)
1-in-1 hr or
1-in-12 hr
Drain Cycle
The built-in alarm safeties shut down the unit.
No. of Beeps
(every 5 sec.)
1 Low-Water Safety
UFS open > 90 sec. after WV energized.
2 Control Switch
In "DRAIN" position longer than 15 min.
High-Pressure Switch
3
First and sec. activation in 1 hour.
High-Pressure Switch
4
Third activation in 1 hour.
Freeze Timer
5
WV off > 30 min. since last WV activation.
6 Low Voltage
(92VAC±5% or less)
High Voltage
7
(147VAC±5% or more)
Gear Motor
8
CCR contacts fail to close.
9 Open Circuit CB K8 #3 and #4.
(CB S1 dip switch 7 on) Not used this model.
Backup MBC engaged or jumper open.
Legend: BC–bin control; CB–control board; CCR–compressor control relay; Comp–
compressor; DV–drain valve; FM–fan motor; GM–gear motor; UFS–upper float
switch; 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.
LED
WTRIN WV
GM GM
GM, WTRIN* (refill), GM, Comp,
COMP FM, WV* (refill)
FLUSH (Drain) 1-in-1: DV-Icemaker
status does not change
1-in-12: DV
Type of Alarm
31
Energized
Components Min.
-
5 min.
-
2 sec.
(1-in-1)
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.
"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.
Max.
-
5 min.
*On until UFS closes.
Alarm sounds after
90 sec.
10 min.
(1-in-12)
Reset Options