Hoshizaki DCM-500BWH-OS - Manual (Page 40)

40
Problem Possible Cause Remedy
[3] Ice purge cycle will
not start.
a) Water Control Relay 1. Low water safety
circuit open
(bad contacts ).
1. Replace.
b) Control Switch 1. Bad contacts. 1. Check for continuity and
replace.
c) Bin Control 1. Open. 1. Bin full, check for
continuity on proximity
switch.
d) Control Board 1. Fails to operate gear
motor relay.
1. See "II.D.4. Control Board
Check Procedure."
e) Gear Motor Fuse 1. Blown. 1. Check gear motor
amperage, bearing
wear (see "V.F.1. Upper
Bearing Wear Check"),
and supply voltage.
f) Gear Motor Thermal
Protector
1. Open. 1. Check gear motor
bearings, supply voltage.
g) Gear Motor 1. Open windings. 1. Replace.
. Auger coupling broke. . Replace.
3. Locked bearings.
3. Replace.
[4] Freeze cycle will not
start (compressor).
a) Gear Motor Protect
Relay
1. Open coil. 1. Replace.
. Open contacts. . Replace.
b) Control Board 1. Defective. 1. See "II.D.4. Control Board
Check Procedure."
c) Starter (Start Relay) 1. Bad contacts. 1. Check for continuity and
replace.
. Coil winding open. . Replace.
3. Loose connections. 3. Tighten.
d) Start Capacitor or Run
Capacitor
1. Defective. 1. Replace.
e) Compressor 1. Power supply not
within specifications.
1. Refer to nameplate and
correct.
. Wiring to compressor. . Check for loose or open
connection, repair or
replace.
3. Defective. 3. Replace.
4. Compressor locked
and internal motor
protector tripped.
4. Replace.
[5] All components
run, but no ice is
produced.
a) Refrigerant 1. Low charge. 1. See "V.B. Service for
Refrigerant Lines."
. Refrigerant line or
component restricted.
. Remove the restriction or
component and replace
the drier.
3. Air or moisture
trapped.
3. Recover refrigerant,
replace drier, evacuate,
and recharge.
b) Expansion Valve 1. Bulb loose. 1. Secure bulb.
. Operating erratically. . Check and replace.
c) Compressor 1. Defective. 1. Replace.