Hoshizaki DCM-500BAH Service Manual page 40

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