Hoshizaki CUBELET ICEMAKER/DISPENSER DCM-750BAH-OS - Manual (Page 44)

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Problem Possible Cause Remedy
[] Abnormal noise. a) Gear Motor or Gear
Head
. Bearing worn out. . Replace.
b) Auger Mechanism . Bad alignment of
auger.
. Realign.
. Foreign matter
interrupting agitator.
. Remove foreign matter.
c) Dispense Water
Solenoid
. Vibration due to
loosening screws.
. Apply thread sealant to
the parts and tighten.
[3] No water dispensed. a) Power Supply . "OFF" position. . Move to "ON" position.
b) Water Supply . Water supply off or
pressure too low.
. Check and get
recommended pressure.
c) Dispensing Water
Valve
. Coil winding open. . Replace.
. Wiring to dispensing
water valve.
. Check for loose or open
connection. Repair or
replace.
d) Control Board . Defective. . See "II.D.4. Control
Board Check Procedure."
e) Water Dispense Switch . Opti Serve sensor
defective. (OS only)
. See "5. Opti Serve (OS)
Sensors."
. Bad contacts. (push
button only)
. Check for continuity and
replace.
5. Opti Serve (OS) Sensors
Be sure to check all items in section "IV.C.4. Dipsensing" prior to using this chart. Use
the following charts along with the wiring diagram to troubleshoot the OS sensors.
Problem Possible Cause Remedy
[] No ice dispensed. a) OS Sensor . Dirty sensor. . Clean, using Scale Away
(6 fl. oz. (0.8 l) per  gal.
(3.8 l) of water) or other
non-abrasive cleaner.
. Defective. . See chart 5a and 5b
below.
b) Dispense Mode Switch . Wrong setting. . Move to desired setting.
. Bad contacts. . Check for continuity and
replace.
3. Loose connection. 3. Tighten.
c) Control Board . Loose connection. . Tighten.
. Defective. . See "II.D.4. Control
Board Check Procedure"
and chart 5a and 5b
below.