Hoshizaki 73183 Refrigerator User Manual


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35
D. Diagnostic Chart
Before consulting the diagnostic charts, check the following:
•Checkthesetpoint.Forfactorydefaultsettings,see"II.C.2.a)DefaultSettings."
•Makesurethedoorsarenotleftopenoropenedtoooftenandthattheyaresealing
properly.
•Makesurethecabinetisnotoverloadedwithwarmorhotproductorproductblocking
airow. Product should be allowed to cool before putting in the unit.
•Checkforcorrectinstallationandpropervoltageperunitnameplate.Thisunitisnot
intended for outdoor use. Normal operating ambient temperature should be within 45°F
to 100°F (7°C to 38°C). The unit should not be located next to ovens, grills, or other
highheatproducingequipment.Theunitshouldbeaminimumof4"(11cm)fromside
wallsandaminimumof10"(25cm)overheadclearanceshouldbeprovidedforproper
ventilation.
•Checkthecontrolmoduleusingthestepsin"IV.B.ControlModuleCheck."
1. Unit Not Cooling
Unit Not Cooling - Possible Cause
1.
Power Supply
a)
Unplugged, off, blown fuse, or tripped or defective circuit breaker. On
three-section receptacle box, only top receptacles have power.
b)
Loose connection.
c)
Not within specications.
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)
Bad contacts.
4.
Wiring
a)
Loose connection or open.
b)
Faulty.
5.
Control Module
See"II.D.2.AlarmSafeties"and
"IV.B.ControlModuleCheck."
a)
Inalarmor"---"displayed.
b)
Defective.
6.
Door Switch
a)
Defective.
7.
Door Switch Relay
a)
Loose connection.
b)
Bad contacts.
c)
Open coil windings.
8.
Evaporator Fan Motor
a)
Defective.
9.
High-Pressure Switch
a)
Dirty condenser.
b)
Ambient temperature too warm.
c)
Condenser fan not operating.
d)
Refrigerant overcharge.
e)
Refrigerant lines or components restricted.
f)
Bad contacts.
10.
Compressor Relay
a)
Bad contacts.
b)
Open coil windings.
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