Hoshizaki KML-631MAH Service Manual page 38

Problem
[5] No water comes from
spray tubes. Water
pump will not start, or
freeze cycle time is
too short. (continued)
[6] Fan motor will
not start, or is not
operating.
[7] All components
run, but no ice is
produced.
Possible Cause
d) Pump Motor
(continued)
e) Control Board
a) Fan Motor
b) Control Board
a) Refrigerant
b) Compressor
c) Hot Gas Valve
d) Line Valve
(if applicable)
e) Inlet Water Valve
f) Headmaster (C.P.R.)
(remote air-cooled
model)
g) Water Supply Line
(water-cooled model)
h) Water Regulator
(water-cooled model)
3. Bearing worn out.
4. Wiring to pump motor. 4. Check for loose
5. Defective capacitor.
6. Defective or bound
impeller.
1. Defective.
1. Motor winding opened. 1. Replace.
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 cycle.
1. Continues to close in
freeze cycle.
1. Water valve is wide
open during freeze.
1. Not operating properly
and liquid line
temperature too warm.
1. Condenser water
pressure too low or off
and pressure control
opens and closes
frequently.
1. Set too high.
38
Remedy
3. Replace.
connection or open, and
replace.
5. Replace.
6. Replace and clean.
1. See "II.C.4. Control Board
Check Procedure."
2. Replace.
3. Check for loose
connection or open, and
replace.
4. Replace.
5. Check and replace.
1. See "II.C.4. Control Board
Check Procedure."
1. Check for leaks and
recharge.
2. Replace drier and
recharge.
1. Replace.
1. Check and replace.
1. Check and replace.
1. Check for water leaks with
icemaker off.
1. Replace headmaster.
1. Check and get
recommended pressure.
1. Adjust or replace. See
"V.G. Adjustment of Water
Regulating Valve."