Related Manuals for Hoshizaki HRE-B Series
Summary of Contents for Hoshizaki HRE-B Series
- Page 1 COMMERCIAL REFRIGERATOR/FREEZER HRE-B series HFE-B series HRFE-B series (China, Hong Kong, Singapore, Taiwan) SERVICE MANUAL Use this service manual for product with auxiliary code B-1 or later. R273-865 (102417)
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Page 2: Table Of Contents
CONTENTS PAGE I. GENERAL INFORMATION --------------------------------------------------------------------------1 1. SPECIFICATION CHANGES ---------------------------------------------------------------------1 2. SAFETY INSTRUCTIONS -------------------------------------------------------------------------2 3. DIMENSIONS/SPECIFICATIONS ---------------------------------------------------------------4 II. TECHNICAL INFORMATION -----------------------------------------------------------------------5 1. WIRING DIAGRAM ----------------------------------------------------------------------------------5 [a] HRE-77B-CHD (Model Code: R273) -------------------------------------------------------5 [b] HRE-127/147B-CHD (Model Code: R274/275) ------------------------------------------6 [c] HRE-187B-CHD (Model Code: R276) ------------------------------------------------------7 [d] HFE-77B-CHD (Model Code: R277) --------------------------------------------------------8 [e] HFE-127/147B-CHD (Model Code: R278/279) ------------------------------------------9 [f] HFE-187B-CHD (Model Code: R280) ----------------------------------------------------- 10... - Page 3 [e] MODEL SETTING AT CONTROLLER BOARD REPLACEMENT ----------------- 31 [f] CORRECTING DISPLAYED CABINET TEMPERATURE---------------------------- 32 III. SERVICE DIAGNOSIS ---------------------------------------------------------------------------- 34 1. ERROR CODES ----------------------------------------------------------------------------------- 34 2. FLOWCHART --------------------------------------------------------------------------------------- 37 3. COMPONENTS ------------------------------------------------------------------------------------ 39 4. CONTROLLER BOARD -------------------------------------------------------------------------- 41 [a] SERVICING CONTROLLER BOARD ---------------------------------------------------- 41 [b] CHECKING THERMISTOR ----------------------------------------------------------------- 42 IV.
- Page 4 Explanation for Model Name * * * - * * * * * - * * * - * * Product Classification Structure HRE: Refrigerator ML: Mullion-less HFE: Freezer HRFE: Refrigerator/Freezer Body Dimensions Door Type Width Depth HD: Half door type 70: 700 mm 800 mm LD: Long door type...
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Page 5: General Information
I. GENERAL INFORMATION 1. SPECIFICATION CHANGES Model New code Old code Auxiliary code B1 and later B0 and earlier Refrigerator HRE-77B-CHD R273 R046 HRE-127B-CHD R274 R110 HRE-147B-CHD R275 R047 HRE-187B-CHD R276 R112 Freezer HFE-77B-CHD R277 R048 HFE-127B-CHD R278 R111 HFE-147B-CHD R279 R049 HFE-187B-CHD... -
Page 6: Safety Instructions
2. SAFETY INSTRUCTIONS The following instructions contain important safety precautions and should be strictly observed. The terms used here are defined as follows: WARNING: There is a possibility of death or serious injury to the service person and a third party or the user due to improper service operations or defects in serviced products. - Page 7 (7) Before servicing, check the surface temperature of the refrigeration circuit to prevent a burn. 5. Keep the following in mind when making electrical connections: (1) Check for proper earth connections, and repair if necessary to prevent electric shocks. (2) Always use service parts intended for the applicable model for replacement of defective parts.
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Page 8: Dimensions/Specifications
3. DIMENSIONS/SPECIFICATIONS Note: Refer to “Dimensional Drawings” on HOSHIZAKI NET. HRE-77B-CHD (Model Code: R273) HRE-127B-CHD (Model Code: R274) HRE-147B-CHD (Model Code: R275) HRE-187B-CHD (Model Code: R276) HFE-77B-CHD (Model Code: R277) HFE-127B-CHD (Model Code: R278) HFE-147B-CHD (Model Code: R279) HFE-187B-CHD (Model Code: R280) -
Page 9: Technical Information
II. TECHNICAL INFORMATION 1. WIRING DIAGRAM [a] HRE-77B-CHD (Model Code: R273) -
Page 10: [B] Hre-127/147B-Chd (Model Code: R274/275)
[b] HRE-127/147B-CHD (Model Code: R274/275) -
Page 11: [C] Hre-187B-Chd (Model Code: R276)
[c] HRE-187B-CHD (Model Code: R276) -
Page 12: [D] Hfe-77B-Chd (Model Code: R277)
[d] HFE-77B-CHD (Model Code: R277) -
Page 13: [E] Hfe-127/147B-Chd (Model Code: R278/279)
[e] HFE-127/147B-CHD (Model Code: R278/279) -
Page 14: [F] Hfe-187B-Chd (Model Code: R280)
[f] HFE-187B-CHD (Model Code: R280) -
Page 15: [G] Hrfe-77B-Chd (Model Code: R271)
[g] HRFE-77B-CHD (Model Code: R271) -
Page 16: [H] Hre-127/147B-Chd-Ml (Model Code: R320/321)
[h] HRE-127/147B-CHD-ML (Model Code: R320/321) -
Page 17: [I] Hre-187B-Chd-Ml (Model Code: R322)
[i] HRE-187B-CHD-ML (Model Code: R322) -
Page 18: [J] Hfe-127/147B-Chd-Ml (Model Code: R323/324)
[j] HFE-127/147B-CHD-ML (Model Code: R323/324) -
Page 19: [K] Hfe-187B-Chd-Ml (Model Code: R325)
[k] HFE-187B-CHD-ML (Model Code: R325) -
Page 20: Refrigeration Circuit
2. REFRIGERATION CIRCUIT HRE/HFE Compressor Heat Exchange Evaporator Drier HRFE-77B Compressor (Freezer) Heat Exchange Evaporator Drier Compressor (Refrigerator) Heat Exchange Evaporator Drier Refrigerant: HFC-134a (HRE series) (HRFE refrigerator) HFC-404A (HFE series) (HRFE freezer) (HRE-187B glass door model) There may be exceptions for some customized models. -
Page 21: Energy Saving Features
3. ENERGY SAVING FEATURES [a] FRAME HEATER ENERGIZING CONTROL The frame heater is energized intermittently to keep the front frame surfaces at the optimum temperature for preventing condensation. As the optimum surface temperature depends on the ambient temperature, the ratio between ON time and OFF time is determined by the difference between the ambient temperature (measured by the temperature sensor built in the controller board) and the cabinet temperature (measured by the interior thermistor). -
Page 22: [B] Interior Dc Fan Motor
HFE/HRFE series duty ratio Level 2: Factory adjustment Level 6: Constantly ON The heater control reduces the power consumption, and the less heat invasion into the cabinet improves the refrigeration unit operating efficiency, resulting in significant energy saving effects. [b] INTERIOR DC FAN MOTOR The highly efficient DC brushless motor reduces the power consumption of the motor body from 21 W to 4 W with the same output. -
Page 23: Electronic Controls
4. ELECTRONIC CONTROLS [a] SET POINT TEMPERATURE (mean temperature between compressor ON and OFF temperatures) Heater defrost (Refrigerator): -6 to +12°C Set Point Temperature Heater defrost (Freezer): -25 to -7°C Time Compressor [b] CABINET TEMPERATURE DIFFERENTIAL 3.7 K (from “set point temp - 2.0 K” to “set point temp + 1.7 K”) Note: On the controller board only. -
Page 24: [F] Compressor Soft Start
[f] COMPRESSOR SOFT START 1) Startup Power ON 3 min* 20 sec * HRFE: 5 min Compressor Condenser Fan Motor Interior Fan Motor Cabinet Temp. Display When the power supply is turned on, the temperature display window shows the cabinet temperature, but the compressor and condenser fan motor start up with a 3 minute (5 minute for HRFE) delay. -
Page 25: [H] Checking And Adjusting Set Point Temperature
All models are provided with a high pressure sensor to monitor the condensing temperature. If the high-side pressure rises to operate the high pressure sensor, the compressor will not restart for at least 6 minutes to protect itself. [h] CHECKING AND ADJUSTING SET POINT TEMPERATURE Press the set point button to display the set point temperature on the temperature display window. -
Page 26: [K] Cancelling Soft Start
[k] CANCELING SOFT START To cancel the “soft start” (3 minute delay for HRE/HFE, 5 minute delay for HRFE), turn on the power supply while pressing the set point button. The compressor and condenser fan motor will start at the same time after 10 seconds. When the soft start is cancelled, the illuminated seven segment LED on the temperature display window changes to the model setting number. -
Page 27: Timing Chart
5. TIMING CHART [a] STARTUP - CONTROL HRE, HFE series 3 min 20 sec Power Supply Temp Display Frame Heater Compressor Condenser Fan Motor Interior Fan Motor Interior Thermistor Temp Set Point Temp + 1.7 K Set Point Temp Set Point Temp - 2.0 K (1) Frame Heater Control Intermittent energization by difference between ambient and cabinet temperatures. - Page 28 HRFE series [Refrigerator/Freezer] 5 min 20 sec Power Supply Temp Display Frame Heater [Freezer] Compressor Condenser Fan Motor Interior Fan Motor Interior Thermistor Temp Set Point Temp + 1.7 K Set Point Temp Set Point Temp - 2.0 K [Refrigerator] 10 sec 2 min 10 sec...
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Page 29: [B] Defrost
[b] DEFROST HRE series 20 sec OFF Update duty ratio Maintain previous duty ratio Update duty ratio Frame Heater Compressor Condenser Fan Motor 15 sec ON 2 min OFF Interior Fan Motor Defrost Heater Detects end of cycle (30°C) Defrost (Interior) Thermistor Temp Interior FM Display... - Page 30 HRFE series [Refrigerator] 20 sec OFF Update duty ratio Maintain previous duty ratio Update duty ratio Frame Heater Compressor Condenser Fan Motor 15 sec ON 2 min OFF Interior Fan Motor Defrost Heater Detects end of cycle (13°C) Defrost (Interior) Thermistor Temp Interior FM Display...
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Page 31: Button Operation
Subject of Description Model Purpose Control Frame (1) Remains OFF for 20 sec after Improve Heater compressor starts following drain cycle HRFE compressor startability (2) Duty ratio is not updated and maintains Prevent previous ratio after defrost cycle starts HRFE condensation and until interior fan motor delay ends Interior... -
Page 32: [C] Checking And Deleting Error Records
[c] CHECKING AND DELETING ERROR RECORDS To check error records: 1) Press the reset button and set point button (REF set point button for HRFE) at the same time for 5 seconds (reset button first). The temperature display window will show “F0”. 2) Press the temperature control button until “F6”... - Page 33 (2) Frame Heater Duty Ratio Level If condensation occurs on the front frame: Press the frame heater button for 3 seconds to illuminate the lamp on the button (the duty ratio is raised by 1 level). To freely select the frame heater duty ratio level from 1 to 6: 1) Hold down the frame heater button and press the set point button (REF set point button for HRFE).
- Page 34 Code Function Indication with Set Point Button Automatic Defrost Cycle – –: No automatic defrost cycle Interval 3: Every 3 hrs 6: Every 6 hrs (default setting) 8: Every 8 hrs 12: Every 12 hrs 24: Every 24 hrs Long defrost cycle intervals may increase frosting and cause inadequate cooling.
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Page 35: [E] Model Setting At Controller Board Replacement
Code Function Indication with REF Set Point Button Interior Condensation – –: No control (default setting) Control (prevention of Ambient temperature OFF time * For HRFE interior condensation 1: Low 15°C or less 30 min refrigerator in refrigerator due to 2: Mid 15°C or less 20 min... -
Page 36: [F] Correcting Displayed Cabinet Temperature
Change the freezer defrost detection temperature from 13°C to 20°C as below. 7) Hold down the reset button and two temperature control buttons and turn on the power supply. The REF and FRE temperature display windows will show “2.2.” and “2.4.” respectively. - Page 37 4) Turn on the power supply while holding down the reset button and two temperature control buttons together. 5) “2.2.” (HRE) or “2.4.” (HFE) appears on the temperature display window. 6) Press the temperature control button until “5.2.” appears on the display. 7) While holding down the set point button, press the temperature control button until “5.0.”...
- Page 40 The error cords are indicated in the following order of priority: EA > Ed > E5 > E8 > E9 > E4 > E7 > E3 > E1 > E2 Set Point Error Detection R-134a R-404A High pressure Clog thermistor Clog thermistor immediately at 78 °C immediately at 73 °C...
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Page 41: Flowchart
2. FLOWCHART PROBLEM PROBLEM POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS") No refrigeration Compressor will not start No temp indication [1] Safety Breaker [2] Power Supply Board Controller board 12V DC output [3] Controller Board Open circuit, connector unplugged EA, Ed error indication [3] Controller Board Defective No error indication... - Page 42 PROBLEM PROBLEM POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS") Poor refrigeration Slow refrigeration Set point is reached Interior overloaded Set point is not reached See "Compressor runs with no refrigeration" above Normal temp indication with poor Interior overloaded refrigeration Heat load inside [14] Interior Fan Motor Open circuit, defective [2] Power Supply Board...
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Page 43: Components
3. COMPONENTS CHART COMPONENT CHECK REMEDY Safety Breaker Safety breaker trips Locate earth leakage/short circuit Safety breaker splashed with water Dry and replace if necessary Power Supply Board Open circuit Correct or replace (in Relay Box) Input/output (controller board, interior fan motor) Replace Input: 115V AC Output: 12V DC... - Page 44 CHART COMPONENT CHECK REMEDY Compressor Electrical part defective (constant speed compressor only) - Run/start capacitor ruptured/deformed - Capacitor defective Check resistance between terminals Gradually reduces: No problem 0Ω from start: Defective - Starter defective Loose terminal, no conductivity, damaged - Overload relay defective Loose terminal, no conductivity, damaged [10] Sheath Heater *...
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Page 45: Controller Board
4. CONTROLLER BOARD [a] SERVICING CONTROLLER BOARD 1) When receiving a service call, ask the user to turn off the power supply and turn it back on after 30 seconds, while watching the unit. This will reset the controller, and in some cases normal operation will resume. -
Page 46: [B] Checking Thermistor
[b] CHECKING THERMISTOR 1) Remove the thermistor’s intermediate connector from the controller board. 2) Put ice and water in a glass or other container to make 0°C water. Immerse the thermistor bulb in the water for 5 minutes (at the center of the container). 3) Use the Ω... -
Page 47: Removal And Replacement Of Components
IV. REMOVAL AND REPLACEMENT OF COMPONENTS 1. CONTROLLER BOARD AND THERMISTOR Cover [a] REMOVAL OF CONTROL BOX 1) Lift the cover off the back of the control box. 2) Remove the screw (rear left) securing the control box, and Screw remove the control box. - Page 48 4) Pull out the thermistors through the hole in the refrigeration unit base. Be careful not to press hard on the bulbs and leads. 5) Remove the clog thermistor bulb by removing the thermistor holder located at the center or outlet of the condenser. 6) Remove the control box, and disconnect the thermistor connectors.
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Page 49: Relay Box
2. RELAY BOX [a] POWER SUPPLY BOARD 1) Unplug the unit. Top View of Relay Box 2) Disconnect the connectors. Power Supply Board 3) Loosen and remove the two board supports at the back. 4) Loosen the three screws from outside the relay box, and Board Support remove the power supply board. -
Page 50: [B] Condenser And Drier
[b] CONDENSER AND DRIER 1) Unplug the unit. 2) Remove the front panel. 3) Recover the refrigerant from the low side access valve. 4) Unscrew the condenser. 5) Disconnect the drier from the wire retainer. 6) Disconnect the condenser from the upper inlet pipe connection using brazing equipment. -
Page 51: [D] Condenser Fan Motor
[d] CONDENSER FAN MOTOR 1) Unplug the unit. 2) Remove the front panel. 3) Disconnect the condenser fan motor. 4) Remove the two screws securing the bracket on the refrigeration unit base. 5) Pull up the fan motor together with the bracket. 6) Loosen the nut securing the fan motor shaft, and remove the fan motor. - Page 52 Note: Locate the defrost heater in the same position as before. Fit the first front line into the first U-channel, and position the rest according to the U-bend dimensions. Thermal Fuse Bracket HRE, HFE Evaporator Defrost Heater Support Front Fit into the first U-channel The U-channels used depend on heater shape.
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Page 53: Evaporation Tank (Forced Drain Water Evaporation Model Only)
4. EVAPORATION TANK (Forced drain water evaporation model only) 1) Unplug the unit. 2) Unscrew and remove the rear panel. 3) Unscrew the upper part of the evaporation tank cover, and lift off the cover. [a] DRAIN TANK HEATER 1) Unscrew and remove the drain tank duct. 2) Unscrew the drain tank flange securing the drain tank heater. -
Page 54: Air Duct
5. AIR DUCT [a] AIR DUCT Left Side View of Air Duct Hook 1) Remove the two or three screws at the front of the air duct. 2) Hold both sides of the air duct, and pull it forward. duct freezer Screw compartment is provided with a gasket in the... -
Page 55: [C] Interior Fan Motor (Hrfe-77B)
7) To replace the removed parts, reverse the above procedure. Cover the interior fan motor leads with the insulation tube as a cushion through the hole in the refrigeration unit. Note: To prevent the leads from being caught between the fan blades, fix the leads with the wire retainer inside the air duct before fitting the air duct. -
Page 56: [B] Hinge Spacer
[b] HINGE SPACER For door closing adjustment, the hinge spacers may be provided between the hinges and cabinet. When removed, the hinge spacers must be reinstalled in the correct position. When the door is replaced or the gasket is often caught in the door, order the following parts and replace the hinge spacers: Hinge Spacer 473352M01... -
Page 57: Door (Ml Series Only)
7. DOOR (ML series only) 1) Remove the front panel. Lead 2) Check that a red 3P connector is on the refrigeration unit side. The door is provided with a heater lead coming from the upper hinge of the upper door or the lower hinge of Hinge Spacer the lower door, through the side of the cabinet, into the Screw... -
Page 58: Condenser Cleaning Pan
If there is a gap between the center seals: Loosen the mounting bolts securing the upper, lower, left and right door hinges, and decrease the dimension between the doors until there is no gap between the center seals. After adjustment, tighten the mounting bolts. 11) When reinstalling the lead cover, reconnect the connectors directly, and put all the connectors in the lead cover. -
Page 59: Optional Parts
9. OPTIONAL PARTS [a] HINGE KIT The door hinges for HRE-70B and HFE-70B can be moved to the other side of the door by using the following hinge kit. Hinge Kit (R) Door Hinge (R) - Lo 375316G01 1 pc Door Hinge (R) - Up 375315G01 1 pc... -
Page 60: [C] Leg
[c] LEG Width 700/1200/1400mm 1800mm H=90 P00316-01 4 pcs 6 pcs H=150 446733-01 4 pcs 6 pcs SUS H=90 4Y2043-01 4 pcs 6 pcs SUS H=150 4Y2041-01 4 pcs 6 pcs [d] CASTER Width 700/1200/1400mm 1800mm Caster P00635-01 4 pcs 6 pcs Plain Washer FWPL20F0...
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