Hoshizaki KM-1301SAH/3 User Manual download pdf (Page 49)

IV. Service Diagnosis

WARNING

1. This unit should be diagnosed and repaired only by qualied service

personnel to reduce the risk of death, electric shock, serious injury, or re.

. Risk of electric shock. Use extreme caution and exercise safe electrical

practices.

3. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

4. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews

are securely in place after the unit is serviced. Make sure that none have

fallen into the storage bin.

5. Make sure all food zones in the icemaker and storage bin are clean after

the unit is serviced. For cleaning procedures, see "VI. Cleaning and

Maintenance."

A. Diagnostic Procedure

The diagnostic procedure is basically a sequence check which can be used at unit

startup or for system diagnosis. This procedure allows you to diagnose electrical system

and component failures in normal operating conditions of 70°F (1°C) or warmer air and

50°F (10°C) or warmer water temperatures. Before conducting the diagnostic procedure,

check for correct installation, proper voltage per unit nameplate, and adequate water

supply. Check CB using the steps in "IV.B. Control Board Check." Check the dip switch

settings to assure that S4 dip switch 3, 4, 7, 8, 9, & 10 and S5 dip switch 1 through 5 are

in the factory default position. S4 dip switch 1, , 5, & 6 are cleaning adjustments and

the settings are exible. For factory default settings, see "II.C.3.a) Default Dip Switch

Settings." As you go through the procedure, check to assure the components energize

and de-energize correctly. If not, those components and controls are suspect.

1) Turn off the power supply, then access the control box. Clear any ice from BC.

) Turn on the power supply, then move the control switch to the "ICE" position. A

5-second delay occurs. The red "POWER OK" LED and the green "BC CLOSED" LED

on the CB come on. If the yellow "BC OPEN" LED is on (indicating a full bin), conrm

that the CB K4 jumper is in place. If missing, the unit cannot operate.

WARNING

1. Risk of electric shock. Use extreme caution and exercise safe electrical

practices.

. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

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Hoshizaki KM-1301SAH/3 User Manual Page 49