Hoshizaki KM-500MAF Service Manual page 37

PROBLEM
[5] No water a) Water Supply Line
comes from
Spray Tubes.
Water Pump b) Water Solenoid
will not start, or Valve
freeze cycle
time is too c) Water System
short.
d) Pump Motor
e) Controller Board
[6] Fan Motor will a) Fan Motor
not start, or is
not operating.
b) Controller Board
[7] All components a) Refrigerant
run but no ice
is produced.
b) Compressor
c) Hot Gas Solenoid
Valve
d) Line Valve
e) Water Supply Line
[Water-cooled model
only]
POSSIBLE CAUSE
1. Water pressure too low and 1. Check and get
water level in Water Tank
too low.
1. Dirty mesh filter or orifice
and water level in Water
Tank too low.
1. Water leaks.
2. Clogged.
1. Motor winding opened.
2. Bearing worn out.
3. Wiring to Pump Motor.
4. Defective Capacitor.
5. Defective or bound impeller. 5. Replace and clean.
6. Mechanical Seal worn out.
1. Defective.
1. Motor winding opened.
2. Bearing worn out.
3. Wiring to Fan Motor.
4. Defective Capacitor.
5. Fan blade bound.
1. Defective.
1. Undercharged.
2. Air or moisture trapped.
1. Defective valve.
1. Continues to open in freeze 1. Check and replace.
cycle.
1. Continues to close in
freeze cycle.
1. Condenser water pressure
too low or off and Pressure
Control opens and closes
frequently.
37
REMEDY
recommended pressure.
1. Clean.
1. Check connections for
water leaks, and replace.
2. Clean.
1. Replace.
2. Replace.
3. Check for loose
connection or open, and
replace.
4. Replace.
6. Check and replace.
1. See "II.2. [e] CHECKING
CONTROLLER BOARD."
1. Replace.
2. Replace.
3. Check for loose
connection or open, and
replace.
4. Replace
5. Check and replace.
1. See "II.2. [e] CHECKING
CONTROLLER BOARD."
1. Check for leaks and
recharge.
2. Replace Drier, and
recharge.
1. Replace.
1. Check and replace
1. Check and get
recommended pressure.