Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 User Manual download pdf (Page 25)

III. Service Diagnosis

WARNING

1. This unit should be disassembled or repaired only by a qualied service

technician to reduce the risk of injury, electric shock, or re.

2. Do not make any alterations to the unit. This could cause water leak, electric

shock, or re.

3. To help reduce the risk of electric shock, do not touch the attachment plug or

switches with damp hands.

4. In case of insufficient refrigeration performance, move the stored food

product into another unit to prevent its deterioration.

A. Alarm Signals

In the event of operation outside of normal parameters, the control board identies the

issue with an alarm signal. The alarm signal and cabinet temperature are displayed in

1‑secondintervals.Forfurtherserviceinformation,see"III.B.ServiceChart."Ifmultiple

alarms occur simultaneously, only the alarm with the higher priority is displayed.

Alarm

Signal

Priority Problem Reset, Corrections, and Adjustments

E1 8

High Temperature Alarm (cabinet only)

Cabinet temperature has exceeded the

setpoint temperature by 18°F (10°C) for

more than x hours. The default value of

xis"2".

When the temperature returns to the setpoint

range, alarm resets.

Close doors/drawers and clean the condenser and

air lter. Check for refrigerant leaks. Check cabinet

thermistor.

Thevalueofxcanbechangedunder"F3"onthe

Service Menu.

(0=No delay; 1=1 hour; 2=2 hours; 3=3 hours)

E2 9

Low Temperature Alarm (cabinet only)

Cabinet temperature has remained

below the setpoint by 9°F (5°C) for more

than y hours. The default value of y is

"1".

When the temperature returns to the setpoint

range, alarm resets.

Ambient temperature too low. Check thermistor,

liquid line valve sticking, fans not operating.

Thevalueofycanbechangedunder"F4"onthe

Service Menu.

(0=No delay; 1=hour)

E3 7

Defrost Alarm (cabinet only)

Cabinet defrost has taken longer than

1 hour. The control board has terminated

defrost.

Turn the power off, then back on.

Check defrost heater, defrost thermistor.

Notethat"E3"mayalternatewith"dF"insteadof

the temperature.

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 65 66

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Hoshizaki REFRIGERATED PREP TABLE WITH RAISED RAIL 73168 User Manual Page 25

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