Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 User Manual download pdf (Page 37)

4. Cabinet Defrost

Problem Possible Cause Remedy

[1] Cabinet fan motors

on.

a) Cabinet Fan Relay 1. Bad contacts (closed). 1. Check for continuity and

replace.

b) Control Board 1. Defective. 1. Replace.

[2] Evaporator does

not defrost

completely.

a) Defrost Thermistor 1. Defective. 1. See"II.E.Thermistor

Check."

b) Defrost 1. Not enough defrosts

occurring per day.

Operation in humid

conditions.

1. Factory default is once

every6hours.See"II.D.5.

ServiceMenu."

c) Defrost Heater 1. Defective. 1. Replace heater.

d) Defrost Thermostat 1. Defective, turning off

heaters prematurely,

or fused open.

1. Replace defrost thermostat.

e) Cabinet Liquid Line

Valve

1. Does not close. 1. Check and replace.

[3] Defrost cycle too

long. (E3 Defrost

Alarm)

a) Defrost 1. Not enough defrosts

occurring per day.

Operation in humid

conditions.

1. Factory default is once

every6hours.See"II.D.5

ServiceMenu."

b) Defrost Thermistor 1. Defective. 1. Replace.

c) Defrost Heater 1. Defective. 1. Replace heater.

d) Defrost Thermostat 1. Defective, turning off

heaters prematurely,

or fused open.

1. Replace defrost thermostat.

e) Control Board 1. Defective. 1. Replace.

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Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 User Manual Page 37

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