Hoshizaki DCM-500BWH-OS - Manual (Page 13)

13
Legend: BC
- bin control
Comp
- compressor
DC -
drain cycle
DT -
drain timer
DV
- drain valve
FMS
- self-contained fan motor
FT
- fill timer (low water safety)
GM
- gear motor
GMPR -
gear motor protect relay
LF/S
- lower float switch
UF/S
- upper float switch
WCR
- water control relay
WV
- inlet water valve
Components Energized when the Control Switch is in the "DRAIN" Position The "DRAIN" position on the control switch is used when cleaning and sanitizing the unit. This allows cleaner and sanitizer to drain from the reservoir and evaporator assembly. When switching to the "DRAIN" position during the freeze cycle, the drain valve does not energize until the 150 second shutdown sequence terminates (
. Shutdown & Restart).
Note: To bypass the 150 second shutdown sequence, move the power switch to the "OFF" position, place the control switch in the "DRAIN" position, then move the power switch back to the "ON" position.
UF/S
open
LF/S
open (WV on)
WCR
off
FT
started (90 sec.)
WV
on
Comp
continues
FMS
co
ntinues
GM
continues
GMPR
continues
DCM-500BAH(-OS), DCM-500BWH(-OS) Sequence Flow Chart and Component
Operation
1. Startup
2. Ice Purge Cycle
WV
on
LF/S
closed
UF/S
closed (WV off)
WCR
on
WV
off
GM
on
GMPR
on
Comp
on
FMS
on
WCR
continues
GM
continues
GMPR
continues
Power switch "ON" Control switch in "ICE"
1. Fill Cycle
3. Freeze Cycle
Refill
(90 seconds)
LF/S
closed
UF/S
closed (WV off)
WCR
on
FT
off (90 sec.)
WV
off
Comp
continues
FMS
continues
GM
continues
GMPR
continues
Low Water Safety
UF/S
open
FT
exceeded
Comp
continues
FMS
continues
GM
continues
GMPR
continues
WV
continues
Comp
off
FMS
off
WV
continues
GM
continues
GMPR
continues
GM
off
GMPR
off
WV
continues until
UF/S
closes
90 seconds
60 seconds
If refill > 90 sec.
FT
, 150 second
shutdown sequence begins
60 seconds
150 sec. Shutdown Sequence
UF/S
open
60 seconds
2. Shutdown & Restart
90 seconds 1.
Bin Full
Comp
off
FMS
off
GM
continues
GMPR
continues
GM
off
GMPR
off
DV
on (
DC
only)
3. Icemaker is Off
BC
open or
DC
starts
Comp
continues
FMS
continues
GM
continues
GMPR
continues
2. Ice Purge Cycle
4. Ice Level Lowered See "1. Fill Cycle" above
150 seconds
BC
closed
or 20 Min. DT
off (
DC
only)
DV
off (
DC
only)
12 hour DT
reset (
DC
only)
4. 12 Hour Drain Cycle
DV
opens for
0 minutes every 1
hours
See "3. 1
Hour Drain Cycle" below.
3. 12 Hour Drain Cycle
Shutdown & Restart
1.
Drain Cycle initiates
2. Ice Purge Cycle
3. Drain Cycle
4. 12 hour DC - Restart See "1. Fill Cycle" above
DV on for 20 minutes