Hoshizaki RELIABILITY IS A BEAUTIFUL THING DCM-270BAH-OS, Service Manual

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IV. Service Diagnosis
1. No Ice Production
PROBLEM POSSIBLE CAUSE REMEDY
[1] The ice dispenser will
not start.
a) Power Supply Cord 1. Broken or loose
connection.
1. Check for contintinuity and
replace.
2. Loose connection. 2. Tighten.
3. Bad contacts. 3. Check for contintinuity and
replace.
4. Blown fuse. 4. Replace.
b) Power Switch (on left
bottom of front panel)
1. OFF position. 1. Move to ON position.
c) Fuse 1A (Control Box) 1. Blown out. 1. Check for short circuit and
replace.
[2] a) Water Supply Line 1. Shut-off valve closed. 1. Open.
2. Water supply off. 2. Check and get
recommended pressure.
b) Water Valve 1. Clogged. 1. Clean.
c) Water Control Relay 1. Bad contacts (terminal
nos. 4 and 6).
1. Check for continuity and
replace.
2. Coil winding opened. 2. Replace.
3. Loose connections. 3. Tighten.
d) Timer 1. Bad contacts. 1. Check for continuity and
replace.
2. Coil winding opened. 2. Replace.
3. Loose connections. 3. Tighten.
4. Defective. 4. Replace.
[3] a) Compressor 1. Motor winding opened
or grounded.
1. Replace.
b) Timer 1. Bad contacts (X2 relay). 1. Check for continuity and
replace.
2. X2 relay coil winding
opened.
2. Replace.
3. Loose connections. 3. Tighten.
c) Motor Protector 1. Bad contacts. 1. Check for continuity and
replace.
d) Starter 1. Bad contacts. 1. Check for continuity and
replace.
e) Starting Capacitor 1. Defective. 1. Replace.
[4] a) Gear Motor 1. Motor winding opened. 1. Replace.
b) Timer 1. Bad contacts (X1 relay). 1. Check for continuity and
replace.
c) Protect Relay 1. Bad contacts. 1. Check for continuity and
replace.
2. Coil winding opened. 2. Replace.
3. Loose connections. 3. Tighten.
d) Protector 1. Bad contact. 1. Check for continuity and
replace.
e) Capacitor 1. Defective. 1. Replace.
Compressor will not
start.
Water valve operates,
but no ice is produced.
Gear motor will not
start.