Problem

Possible Cause

 

Remedy

[9] Defrost cycle

a)Defrost Thermistor

1. Defective.

1. Replace.

lasts too long.

b)Control Board

1. Defective.

1. Replace.

 

c) Defrost

1. Not enough defrosts

1. Factory default is once every

 

 

occurring per day.

6 hours. If coil is frosting too

 

 

Operation in humid

much, can shorten defrost

 

 

conditions.

interval.

 

d)Defrost Heater

1. Defective.

1. Replace heaters.

 

e)Safety Defrost

1. Defective, turning off

1. Replace safety defrost

 

Thermostat

heaters prematurely,

thermostat.

 

 

or fused open.

 

[10]Condensate

a)Cabinet Contents

1. Loading of large

1. Cover product with plastic

water overflow.

 

volumes of warm,

wrap.

 

 

moist, uncovered

 

 

 

product.

 

 

b)Location of Unit

1. Unit located near high

1. Relocate.

 

 

humidity source such

 

 

 

as fryer, steamer, etc.

 

 

c) Seals

1. Poor sealing around

1. Adjust or replace.

 

 

evaporator, door

 

 

 

gaskets.

 

 

d)Environment

1. Extreme environment

1. Adjust conditions.

 

 

and door-opening

 

 

 

conditions.

 

[11]Abnormal Noise

a)Fasteners

1. Loose fasteners allow

1. Tighten fasteners.

 

 

vibration of part.

 

 

b)Compressor

1. Problem with mount.

1. Properly mount compressor.

 

 

 

Replace any missing

 

 

 

grommets.

 

 

2. Floodback to

2. Check for signs of floodback

 

 

compressor.

to compressor. Evacuate and

 

 

 

recharge if necessary.

 

 

3. Defective.

3. Replace.

 

c) Fan

1. Fan blade loose.

1. Adjust and tighten.

 

 

2. Defective motor.

2. Replace.

 

d) Relay

1. Chattering.

1. Replace.

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Hoshizaki HWR68A(-D), HWR40A(-D), HUR96A(-D), HUR68A(-D), HUR40A(-D) service manual Problem Possible Cause Remedy