Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagram
- II. Sequence of Operation and Service Diagnosis
- III. Controls and Relays
- IV. Refrigeration Circuit and Component Service Information
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
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B. Service Diagnosis
WARNING
• This appliance should be diagnosed and repaired only by qualied 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.
• Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after the appliance is serviced. Make sure that none have fallen
into the storage bin.
• Make sure all food zones in the appliance and storage bin are clean after service.
• After service, make sure that there are no wires pinched between the panels and
icemaker. Make sure you do not damage or pinch the water supply line, drain line,
or power cord.
1. Ice Production Check
To check production, prepare a bucket or pan to catch the ice and a set of scales to
weigh the ice. After the appliance has operated for 10 to 20 minutes, catch the ice
production for 10 minutes. Weigh the ice to establish the batch weight. Multiply the
batch weight by 144 for the total production in 24 hours. When conrming production or
diagnosing low production, see "VIII.A. Specication and Performance Data" for typical
production information.
2. Diagnostic Procedure
This diagnostic procedure is a sequence check that allows you to diagnose the electrical
system and components. Before proceeding, check for correct installation, proper voltage
per appliance nameplate, and adequate water pressure (7 to 113PSIG).
Note: • When checking high voltage (115VAC), always choose a white (W) neutral wire to
establish a good neutral connection.
• Time Delay Relay: 90 sec. low water safety circuit. Controlled by LFS and UFS
and water control relay.
• Optional drain pump (HS-5061) has 115VAC power supply as soon as the
appliance is plugged into the electrical outlet.
1) Conrm the appliance is plugged into the electrical outlet, supply voltage is correct per
nameplate.
2) Move the control switch to the "DRAIN" position. DV Diagnosis: If DV does not
energize, check for 115VAC at control switch terminal #3 (W/DBU) to neutral (W).
If115VAC is not present, check control switch continuity, optional drain pump connector/
jumper and safety switch, and power supply. If 115VAC is present, check DV coil
continuity. Replace as needed. If optional drain pump is installed, see "II.E. Optional
Drain Pump HS-5061."