Problem

Possible Cause

 

 

Remedy

[1]

Cabinet

g)

Defrost

1.

Defrost time

1.

See "4. Cabinet Defrost."

 

temperature too

 

 

 

insufficient to remove

 

 

 

high. (continued)

 

 

 

frost. Operation in

 

 

 

 

 

 

 

humid conditions.

 

 

 

 

 

 

2. Incomplete defrost.

2. See "4. Cabinet Defrost."

 

 

h)

Air Filter or Condenser

1.

Clogged, dirty.

1.

Clean.

 

 

i)

Cabinet Fan Motor

1.

Defective.

1.

Check and replace.

 

 

j)

Cabinet Liquid Line

1.

Does not open.

1.

Check and replace.

 

 

 

Valve

 

 

 

 

 

 

k)

Service Valve(s)

1.

Partially or completely

1.

Confirm service valve is

 

 

 

 

 

closed.

 

open.

 

 

l)

Refrigerant

1.

Leak.

1.

Recover, repair leak,

 

 

 

 

 

 

 

replace drier, evacuate, and

 

 

 

 

 

 

 

recharge.

 

 

m) Expansion Valve

1.

Operating erratically.

1.

Check and replace.

 

 

n)

Compressor

1.

Defective.

1.

See "1.[3] Compressor will

 

 

 

 

 

 

 

not start or stops operating."

 

 

o)

Control Board

1.

Defective.

1.

Replace.

[2]

Cabinet temperature

a)

Setpoint and/or

1.

Incorrect.

1.

Correct setting(s).

 

too low.

 

Temperature

 

 

 

See "II.D.4.c) Temperature

 

 

 

Correction Factor

 

 

 

Setpoint" or  

 

 

 

 

 

 

 

"II.D.4.f) Temperature

 

 

 

 

 

 

 

Correction Factor" for

 

 

 

 

 

 

 

defaults.

 

 

b)

Frozen Food

1.

Frozen food recently

1.

Allow time for unit to return

 

 

 

 

 

placed in refrigerator.

 

to setpoint temperature.

 

 

c)

Cabinet Thermistor

1.

Defective.

1.

Check and replace.

 

 

d)

Cabinet Liquid Line

1.

Does not close.

1.

Check and replace.

 

 

 

Valve

 

 

 

 

 

 

e)

Compressor Relay

1.

Defective; contacts

1.

Replace.

 

 

 

 

 

welded.

 

 

 

 

f)

Control Board

1.

In alarm or defective.

1.

See "III.A Alarm Signals" or

 

 

 

 

 

 

 

replace.

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Hoshizaki 73168 service manual Problem Possible Cause Remedy