Hoshizaki DCM-750BWH(-OS) Manuale Supplementare

8

When the dispense mode switch is placed in the "PORTION" position, a variable resistor 
(located on the control board) controls the ice dispense time.

The figures on the label indicate dispensing time (sec.). When shipped, the portion 
control is set at the minimum dispensing time (0.6 sec.). 
DCM-750BAH(-OS), DCM-750BWH(-OS). . . . . . .Approximately 0.7 oz.

Amount of ice dispensed per second.
DCM-750BAH(-OS), DCM-750BWH(-OS) . . . . . . Approximately . oz.

Before replacing a control board that does not show a visible defect and that you suspect 
is bad, always conduct the following check procedure. This procedure will help you verify 
your diagnosis.

. Move the control switch to the "ICE" position. The "POWER" LED should come on. 

If the "POWER" LED is off, check that the power supply is on, the power switch is 
in the "ON" position, the door switch is engaged, and the control switch is in the 
"ICE" position. Check the transformer 0.5V secondary circuit and fuse. If the 0.5V 
secondary circuit (K4 pins  and ) has proper voltage and the "POWER" LED is off, 
the control board is bad and should be replaced. 
If the secondary circuit does not have proper voltage, see "IV.C..[] The icemaker will 
not start (Fill Cycle)" for further details.

. Confirm the reservoir is full of water. If no water is in the reservoir, make sure that the 

control switch is not in the "DRAIN" position and that the unit is not in the  hour drain 
cycle. Also check the water supply line, water shutoff valve, and water filters. In the fill 
cycle, the "POWER" LED is the only LED lit on the control board. If no water is filling 
the reservoir, check for 4V at connector K terminal 7 to neutral and connector K3 
(DBU) to neutral. If there is 4V at connector K terminal 7 to neutral and no voltage at 
K3 (DBU) to neutral, the control board is bad and should be replaced. See "IV.C..[] 
The icemaker will not start (Fill Cycle)" for further details. 

. When the reservoir is full, the "GM" LED comes on and the gear motor starts. If the 

"GM" LED does not come on or the gear motor does not start, check that the following 
safety circuits are closed: a) high pressure switch (DCM-750BAH and DCM-750BWH, 
connector K4 terminals 9 and 0, DCM-750BAH-OS and DCM-750BWH-OS, connector 
K4 terminals 5 and 6), b) low water safety/bin control/ice making switch circuit 
(connector K4 terminals 3 and 4). Next, check for 5/0V at connector K "COM" 
and K "NO" on the control board to neutral. If the "GM" LED is on and there is voltage 
at K "COM" to neutral and no voltage at K "NO" to neutral, the control board is 
bad and should be replaced. See wiring diagram "III.C.. Ice Purge Cycle" for further 
details.