Hoshizaki 73183 service manual Defrost Diagnosis

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8)Cool Down Achieved–CTh cools to 3°F (1.7°C) below setpoint. EvapFM and MH continue. Comp and ConFM de‑energize. Diagnosis: If Comp and ConFM do not de-energize, confirm CTh status. See "IV.C. Thermistor Check." If CTh ohm reading is in range and Comp and ConFM do not de-energize, CM is defective and must be replaced.

9)Defrost

Temperature-Initiated Defrost: DTh cools to 8.6°F (-13°C). EvapFM and MH continue. Comp and ConFM de-energize.

Defrost Termination: DTh warms to 40°F (4.4°C). EvapFM and MH continue. Comp and ConFM energize. 2-minute temperature display delay timer starts. 2 minutes later, cabinet temperature appears on DM.

Defrost Diagnosis:

Defrost Initiation: Has DTh cooled to 8.6°F (-13°C) or lower? Confirm DTh status. See "IV.C. Thermistor Check." If DTh is in proper range, confirm that Comp and ConFM de‑energize. If not, check for 115VAC between CM C1 and CM N5. If 115VAC is present and DTh is within proper range, CM is defective and must be replaced. If there is no voltage between CM C1 and CM N5 and Comp and ConFM do not de-energize, check for 115VAC between CR terminal 4 and neutral. If 115VAC is present between CR terminal 4 and neutral, CR is defective and must be replaced.

Defrost Termination: Has DTh warmed to 40°F (4.4°C)? If not yet confirmed, confirm DTh status. See "IV.C. Thermistor Check." If DTh is in proper range, has Comp and ConFM energized? If not, check for 115VAC between CM C1 and CM N5. If 115VAC is not present, CM is defective and must be replaced. If 115VAC is present between CM C1 and CM N5, check for 115VAC on CR coil (terminals 5 and 6). If 115VAC is not present between CR 5 and CR 6, check continuity of HPS. If open, allow time for HPS to reset. If HPS does not reset, replace HPS and diagnose reason for HPS activation. See "IV.A.1.7)c) HPS Activation." If 115VAC is present between CR 5 and CR 6, and Comp and ConFM are not energized, check for 115VAC between CR terminal 4 and neutral and CR terminal 1 and neutral. If 115VAC is present between CR terminal 4 and neutral and not CR terminal 1 and neutral, CR is defective and must be replaced. If CR is good and Comp or ConFM are not energized, check for 115VAC at Comp terminals, Comp overload (integrated with start relay), start components, and Comp and ConFM motor winding continuity. 2-minute temperature delay timer terminates, temperature display appears on DM.

10)MH Diagnosis: Check that MH energizes. Check for 115VAC at MH. If 115VAC is not present, check power supply and continuity of power switch. If 115VAC is present, check amp draw of MH. If an amp reading is not present, check the continuity of MH.

Legend: CM–control module; Comp–compressor; ConFM–condenser fan motor; CR–compressor relay; CTh–cabinet thermistor; DM–display module; DS–door switch; DSR–door switch relay; DTh–defrost thermistor; EvapFM–evaporator fan motors; HPS–high-pressure switch; MH–mullion heater; TXV–thermostatic expansion valve

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Contents Superior Degree Reliability Number Issued Hoshizaki AMERICA, INC Contents Page Serious injury Important Safety InformationIndicates important information about the use and care UnitPage Refrigerated Volume and Shelf Space Specifications Nameplate RatingsDimensions Unit mm One Section/Two Section/Three SectionOne Section II. General Information ConstructionTwo Section Three Section Sequence Cycles and Shutdown Sequence of OperationFreezer Charts Refrigerator Sequence Flow ChartFreezer Sequence Flow Chart Display Module Layout Display ModuleTemperature Setpoint Controls and AdjustmentsControl Module Layout Control ModuleRefrigerator Control Module Freezer Control Module Refrigerator & Freezer Cabinet Alarm SafetiesMullion/Perimeter Heater High-Pressure SwitchThermistors Compressor External or Internal OverloadIII. Technical Data Refrigeration Circuit Wiring Diagrams CR2B-FS/HS, CR3B-FS/HS CF1B-FS/HS, CF3B-FS/HS CF2B-FS/HS, CF3B-FS/HS Page Diagnostic Procedure IV. Service DiagnosisRefrigerator Defrost Diagnosis DefrostFreezer Defrost Page Startup/Cool Down Control Module CheckThermistor Check Unit Not Cooling Diagnostic ChartDefrost Fails to Terminate Evaporator is Frozen UpRefrigerant Recovery Replacement of ComponentsService for Refrigerant Lines Evacuation and Recharge BrazingPage Door Re-Hinging Important Notes for Component ReplacementMaintenance CleaningShutdown and Long Storage

73183 specifications

The Hoshizaki 73183 is a state-of-the-art ice machine that has garnered attention in the foodservice industry for its reliability and efficiency. Renowned for its compact design, the model is particularly well-suited for restaurants, bars, and cafes where space is often at a premium. One of the standout features of the Hoshizaki 73183 is its capability to produce high-quality cube ice, essential for various beverages and food presentation.

One of the primary technologies that sets this ice machine apart is the Kold-Draft ice production method. This technology ensures that the ice produced is not only clear and hard but also lasts longer in drinks, preventing dilution. The 73183 model is capable of producing up to 800 pounds of ice in a 24-hour cycle, making it a reliable choice for businesses requiring a high volume of ice throughout the day.

Energy efficiency is another hallmark of the Hoshizaki 73183. The unit operates with a low energy consumption rate, aligning with today’s demand for sustainable ice production solutions. It is equipped with efficient compressor technology, which reduces operational costs without compromising performance. In addition, the machine utilizes an advanced air-cooled condenser system, making it optimal for various ambient conditions while ensuring consistent ice output.

Durability and ease of maintenance also characterize the Hoshizaki 73183. Constructed with stainless steel, the unit is not only aesthetically pleasing but also resistant to corrosion and wear, ensuring longevity in a demanding kitchen environment. Furthermore, the machine features an easy-to-access design that simplifies cleaning and maintenance, promoting optimal hygiene and performance.

The unit also integrates user-friendly digital controls, allowing operators to monitor ice production rates and make adjustments as needed. An intuitive display provides real-time status updates, ensuring that businesses can always meet their ice needs.

In summary, the Hoshizaki 73183 ice machine combines innovative technology with robust design, making it an ideal choice for businesses seeking a reliable, efficient, and high-performing ice production solution. Its remarkable features and characteristics firmly establish it as a leading option in the competitive landscape of commercial ice machines.
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