Hoshizaki 73168 Manual De Usuario

33

[1] The unit will not 

start.

a) Power Supply

1. Unplugged, off, 

blown fuse, or tripped 
or defective circuit 
breaker.

1. Turn on, replace, or check 

and reset. Call electrician if 
breaker trips repeatedly.

2. Loose connection.

2. Tighten.

3. Not within 

specifications.

3. Refer to nameplate and 

correct.

b) Cord and Plug

1. Defective.

1. Replace.

c) Control Switch

1. "OFF" position.

1. Move to "ON" position.

2. Bad contacts.

2. Check for continuity and 

replace.

d) Transformer

1. Open coil winding.

1. Check continuity and 

replace.

e) Wiring to Control Board 1. Loose connections or 

open.

1. Check for continuity and 

replace.

f) Control Board

1. In alarm.

1. See "III.A. Alarm Signals."

2. Defective.

2. Replace.

[2] Cabinet, rail, or 

condenser fan will 
not start.

a) Fan Motor

1. Motor winding open.

1. Replace.

2. Bearing worn out.

2 Replace.

3. Wiring to fan motor.

3. Check for loose or open 

connection, and replace.

4. Fan blade bound.

4. Check and replace.

b) Evaporator Fan, Rail 

Fan, or Compressor 
Relay 

1. Bad contacts.

1. Check for continuity and 

replace.

2. Coil winding open.

2. Replace.

c) Control Board

1. Defective.

1. Replace.

[3] Compressor will 

not start or stops 
operating.

a) Compressor Relay

1. Bad contacts.

1. Check for continuity and 

replace.

b) Compressor Control 

Relay

1. Bad contacts.

1. Check for continuity and 

replace.

2. Open winding.

2. Replace.

c) Start Relay

1. Bad contacts.

1. Replace.

2. Coil winding open.

2. Replace.

d) Start Capacitor

1. Defective.

1. Check and replace.

e) Wiring to Compressor

1. Loose connection(s).

1. Tighten.

2. Faulty.

2. Check continuity and 

replace.

"EA" is displayed when an EEPROM write error is detected. "ED" is displayed when an
EEPROM verification or read error is detected.

Reset Options
Replacing the control board with a functioning control board will eliminate this alarm 
condition.