Hoshizaki 73183 Manual Do Utilizador

35

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

airflow. 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. 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 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) 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.