Hoshizaki DCM-500BWH-OS - Manual (Page 38)

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C. Diagnostic Charts
1. No Ice Production
Problem Possible Cause Remedy
[1] The icemaker will not
start. (Fill Cycle)
a) Power Supply 1. Off, blown fuse, or
tripped breaker.
1. Turn on, replace, or reset.
. Loose connection. . Tighten.
3. Bad contacts. 3. Check for continuity and
replace.
4. Not within
specifications.
4. Refer to nameplate and
correct.
b) Water Supply 1. Water supply off or
pressure too low.
1. Check and get
recommended pressure.
c) Power Switch
(Control Box)
1. "OFF" position. 1. Move to "ON" position.
. Bad contacts. . Check for continuity and
replace.
d) Door Switch 1. Door switch not
engaged.
1. Engage door switch.
. Bad contacts. . Check for continuity and
replace.
e) Power Protect Relay 1. Voltage not within
specifications.
1. Refer to nameplate and
correct.
. Bad contacts. . Check for continuity and
replace.
f) Transformer 1. Coil winding open. 1. Replace.
g) Fuses () 1. Blown. 1. Check for short circuit and
replace.
h) Control Switch 1. "OFF" or "DRAIN"
position.
1. Move to "ICE" position.
. Bad contacts. . Check for continuity and
replace.
i) Water Control Relay 1. Bad contacts. 1. Check for continuity and
replace.
. Coil winding open. . Replace.
j) Inlet Water Valve 1. Mesh filter or orifice
clogged.
1. Clean.
. Coil winding open. . Replace.
3. Wiring to inlet water
valve.
3. Check for loose or open
connection. Repair or
replace.
k) Float Switch 1. Bad contacts. 1. Check for continuity and
replace.
. Float does not move
freely.
. Clean or replace.
l) Bin Control 1. Open. 1. Bin full, check for
continuity on proximity
switch.
. Actuator sticking. . Adjust or replace.
3. Proximity switch open. 3. Replace.