Hoshizaki AMERICA 73183 - Manual (Page 29)

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E. Diagnostic Tables
Check for correct appliance installation per the instruction manual and proper voltage per
appliance nameplate.
1. Not Cooling
Not Cooling - Possible Cause
1. Power Supply a) Unplugged, off, blown fuse, tripped or defective circuit breaker. On
three-section receptacle box, only top receptacles have power.
b) Loose connection.
c) Not within specifications.
2. Cord and Plug
On three-section model, check
receptacle box cord and plug and
one-section and two-section cords
and plugs.
a) Loose connection.
b) Defective.
3. Power Switch (control box) a) "OFF" position.
b) Defective.
4. Wiring a) Loose connection.
b) Faulty.
5. Control Module
See "III.D. Alarm Safeties" and "II.C.
Control Module Check."
a) In alarm or "- - -" shown on display module on models with remote display
module.
b) Defective.
6. Door Switch a) Not engaged.
b) Defective.
7. Door Switch Relay a) Loose connection.
b) Defective.
8. Evaporator Fan Motor a) Defective.
9. High-Pressure Switch a) Dirty condenser.
b) Ambient temperature too warm.
c) Condenser fan motor not operating.
d) Refrigerant overcharge.
e) Refrigerant lines or components restricted.
f) Defective.
10. Compressor Relay a) Defective.
11. Compressor Protector a) Dirty condenser.
b) Condenser fan motor not operating.
c) Compressor capacitor or start relay defective.
d) Defective.
12. Compressor a) Defective.
13. Condenser a) Dirty.
14. Evaporator
See "2. Evaporator Frozen Up."
a) Clogged or frozen.
15. Refrigerant/Refrigerant Lines a) Refrigerant leak.
b) Refrigerant lines restricted.