Related Manuals for Hoshizaki HRE-70B(-F)
Summary of Contents for Hoshizaki HRE-70B(-F)
- Page 1 NO. R003-746 ISSUED: DEC. 11, 2007 REVISED: DEC. 1, 2008 HOSHIZAKI COMMERCIAL REFRIGERATOR/FREEZER HRE-70B(-F) MODEL HRE-140B(-F) HFE-70B HFE-140B SERVICE MANUAL...
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Page 2: Table Of Contents
CONTENTS PAGE I. GENERAL INFORMATION --------------------------------------------------------------------------1 1. SAFETY INSTRUCTIONS - ------------------------------------------------------------------------1 2. DIMENSIONS/SPECIFICATIONS ---------------------------------------------------------------3 [a] HRE-70B - ------------------------------------------------------------------------------------------3 [b] HRE-140B -----------------------------------------------------------------------------------------4 [c] HFE-70B -------------------------------------------------------------------------------------------5 [d] HFE-140B -----------------------------------------------------------------------------------------6 [e] HRE-70B-F ----------------------------------------------------------------------------------------7 [f] HRE-140B-F --------------------------------------------------------------------------------------8 II. TECHNICAL INFORMATION - ----------------------------------------------------------------------9 1. WIRING DIAGRAM - ---------------------------------------------------------------------------------9 [a] HRE-70B - ------------------------------------------------------------------------------------------9 [b] HRE-140B --------------------------------------------------------------------------------------- 10 [c] HFE-70B ----------------------------------------------------------------------------------------- 11 [d] HFE-140B --------------------------------------------------------------------------------------- 12 [e] HRE-70B-F -------------------------------------------------------------------------------------- 13 [f] HRE-140B-F ------------------------------------------------------------------------------------ 14 2. REFRIGERATION CIRCUIT -------------------------------------------------------------------- 15 3. ENERGY SAVING FEATURES - ---------------------------------------------------------------- 16 [a] FRAME HEATER ENERGIZING CONTROL ------------------------------------------- 16 [b] INTERIOR DC FAN MOTOR --------------------------------------------------------------- 17 [c] CONTROLLER BOARD---------------------------------------------------------------------- 17... - Page 3 [d] ADJUSTING OPERATION SETTINGS -------------------------------------------------- 26 [e] MODEL SETTING AT CONTROLLER BOARD REPLACEMENT - ---------------- 28 III. SERVICE DIAGNOSIS - --------------------------------------------------------------------------- 30 1. ERROR CODES ----------------------------------------------------------------------------------- 30 2. FLOWCHART --------------------------------------------------------------------------------------- 33 3. COMPONENTS ------------------------------------------------------------------------------------ 35 4. CONTROLLER BOARD - ------------------------------------------------------------------------- 37 [a] SERVICING CONTROLLER BOARD ---------------------------------------------------- 37 [b] CHECKING THERMISTOR ----------------------------------------------------------------- 38 IV. REMOVAL AND REPLACEMENT OF COMPONENTS ---------------------------------- 39 1. CONTROLLER BOARD AND THERMISTOR ---------------------------------------------- 39 [a] REMOVAL OF CONTROL BOX ----------------------------------------------------------- 39 [b] REPLACEMENT OF CONTROL BOX --------------------------------------------------- 39 [c] THERMISTOR - --------------------------------------------------------------------------------- 39 2. RELAY BOX ----------------------------------------------------------------------------------------- 41 [a] POWER SUPPLY BOARD ------------------------------------------------------------------ 41 3. REFRIGERATION CIRCUIT -------------------------------------------------------------------- 41 [a] COMPRESSOR - ------------------------------------------------------------------------------- 41 [b] CONDENSER AND DRIER ----------------------------------------------------------------- 42...
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Page 4: General Information
I. GENERAL INFORMATION 1. 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 5 be located, be sure to check again for further leaks after recharging the refrigerant. Leaked refrigerant may produce a poisonous gas when coming in contact with an open flame of a gas cooking stove or a fan heater. (7) Before servicing, check the surface temperature of the refrigeration circuit to prevent a burn.
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Page 6: Dimensions/Specifications
2. DIMENSIONS/SPECIFICATIONS [a] HRE-70B... -
Page 7: [B] Hre-140B
[b] HRE-140B... -
Page 8: [C] Hfe-70B
[c] HFE-70B... -
Page 9: [D] Hfe-140B
[d] HFE-140B... -
Page 10: [E] Hre-70B
[e] HRE-70B-F... -
Page 11: [F] Hre-140B
[f] HRE-140B-F... -
Page 12: Technical Information
II. TECHNICAL INFORMATION 1. WIRING DIAGRAM [a] HRE-70B... -
Page 13: [B] Hre-140B
[b] HRE-140B... -
Page 14: [C] Hfe-70B
[c] HFE-70B... -
Page 15: [D] Hfe-140B
[d] HFE-140B... -
Page 16: [E] Hre-70B-F
[e] HRE-70B-F... -
Page 17: [F] Hre-140B-F
[f] HRE-140B-F... -
Page 18: Refrigeration Circuit
2. REFRIGERATION CIRCUIT Refrigerant: HFC-134a (HRE series) HFC-404A (HFE series) -
Page 19: 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 20: [B] Interior Dc Fan Motor
HFE 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 2 W to 4 W with the same output. -
Page 21: Electronic Controls
4. ELECTRONIC CONTROLS [a] SET POINT TEMPERATURE (mean temperature between compressor ON and OFF temperatures) Set Point Temperature Off-cycle defrost (HRE series): 0 to +16°C Heater defrost (HRE-F series): -6 to +12°C Heater defrost (HFE series): -25 to -7°C Time Compressor [b] CABINET TEMPERATURE DIFFERENTIAL 3.7 K (from “set point temp - 2.0 K”... -
Page 22: [F] Compressor Soft Start
[f] COMPRESSOR SOFT START 1) Startup Power ON 3 min 20 sec 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 delay. Then, the Interior Fan Motor starts up 20 seconds later. -
Page 23: [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. HFE series is also equipped with a backup High Pressure Switch. If the Condensing Temperature Thermistor becomes defective, the High Pressure Switch operates to stop and protect the Compressor. -
Page 24: [K] Cancelling Soft Start
[k] CANCELING SOFT START To cancel the “soft start” (3 minute delay), turn on the power supply while pressing the Set Point Button. The Compressor and Condenser Fan Motor will start at the same time after 0 seconds. When the soft start is cancelled, the illuminated seven segment LED on the Temperature Display Window changes to the model setting number. -
Page 25: 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 Evaporation Signal Evaporation Pan... -
Page 26: [B] Defrost
[b] DEFROST HRE series (Off-cycle defrost) 20 sec OFF Update Maintain duty ratio Max 15 min OFF duty ratio Update duty ratio Frame Heater Compressor Condenser Fan Motor Interior Fan Motor Detects end of cycle (3°C) Defrost (Interior) Thermistor Temp Defrost (until Thermistor detects) Temp Display... - Page 27 HRE-F series (Heater defrost) 20 sec OFF Update Maintain duty ratio Max 15 min OFF duty ratio Update duty ratio Frame Heater Compressor Condenser Fan Motor 5 sec ON Interior Fan Motor Defrost Heater Detects end of cycle (30°C) Defrost (Interior) Thermistor Temp Defrost Drain...
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Page 28: Button Operation
6. BUTTON OPERATION [a] OPERATION PANEL LAYOUT Frame Heater Button Reset Button Manual Defrost Button Set Point Button Temperature Control Button Temperature Display Window [b] BASIC OPERATION Condition Button Pressing Duration Function Constant Set Point — Indicate set point temp while depressed Constant Set Point —... -
Page 29: [D] Adjusting Operation Settings
2) Press the Temperature Control Buttons until “F6” appears. 3) Press the Reset Button to flash the error records in the order of occurrence. “– –” will appear if no error is recorded. 4) Press the Manual Defrost Button to return to “F6”. 5) Repeat step ) to indicate the cabinet temperature. - Page 30 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. The Temperature Display Window will show “2”. 2) Hold down the Set Point Button and use the Temperature Control Buttons to indicate “1” - “6”.
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Page 31: [E] Model Setting At Controller Board Replacement
Code Function Indication with Set Point Button F0 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. - Page 32 To set the mode setting number: ) Turn off the power supply. 2) Hold down the two Temperature Control Buttons and turn on the power supply. The Temperature Display Window will show “0”. Note: This is not the preset model number. 3) Use the Temperature Control Buttons to indicate the desired model number.
- Page 35 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-34a R-404A High pressure Clog Thermistor Clog Thermistor Immediately at 78 °C Immediately at 73 °C...
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Page 36: Flowchart
2. FLOWCHART PROBLEM PROBLEM POSSIBLE CAUSE (numbers corresponding to "3. COMPONENTS") No refrigeration Compressor will not start No temp indication ①Safety Breaker ②Power Supply Board Controller Board 2V DC output ③Controller Board Open circuit, connector unplugged EA, Ed error indication ③Controller Board Defective No error indication... - Page 37 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 ⑭Interior Fan Motor Open circuit, defective ②Power Supply Board...
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Page 38: Components
3. COMPONENTS CHART COMPONENT CHECK REMEDY Safety Breaker Safety Breaker trips Locate earth leakage/short circuit ① Safety Breaker splashed with water Dry and replace if necessary Power Supply Board Open circuit Correct or replace ② (in Relay Box) Input/output (Controller Board, Interior Fan Motor) Replace Input: 115V AC Output: 12V DC... - Page 39 CHART COMPONENT CHECK REMEDY Compressor Electrical part defective (constant speed compressor only) ⑨ - Run/Start Capacitor ruptured/deformed - Capacitor defective Check resistance between terminals Gradually reduces: No problem 0 from start: Defective - Starter defective Loose terminal, no conductivity, damaged - Overload Relay defective Loose terminal, no conductivity, damaged Sheath Heater...
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Page 40: Controller Board
4. CONTROLLER BOARD [a] SERVICING CONTROLLER BOARD ) If 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 41: [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 42: 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 43 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. Note: 1. To replace the removed parts, reverse the above procedure. 2.
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Page 44: 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, Board Support and remove the Power Supply Board. -
Page 45: [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) Unscrew the Drier. 6) Disconnect the Condenser from the upper inlet pipe connection using brazing equipment. -
Page 46: [D] Condenser Fan Motor
[d] CONDENSER FAN MOTOR Bracket 1) Unplug the unit. 2) Remove the Front Panel. 3) Remove the Top Panel. 4) Disconnect the Condenser Fan Motor. Fan Motor 5) Remove the two screws securing the Bracket on the Refrigeration Unit Base. 6) Pull up the Fan Motor together with the Bracket. -
Page 47: Evaporation Tank
7) Unscrew and remove the Thermal Fuse from the Evaporator and Bracket. 8) Pull out the wire through the hole in the Refrigeration Unit Base. 9) To replace the removed parts, reverse the above procedure. Note: Locate the Defrost Heater in the same position as before. Fit the first front line into the first slot channel, and position the rest according to the U-bend dimensions. -
Page 48: [B] Thermostat
[b] THERMOSTAT 1) Unscrew the Thermostat attached to the Drain Tank bottom. 2) Cut the Thermostat leads at their connection. 3) To replace the removed parts, reverse the above procedure. [c] THERMAL FUSE 1) Unscrew the Fuse Holder at the Drain Tank bottom, and remove the Thermal Fuse. 2) Cut the Thermal Fuse leads at their connection. -
Page 49: [B] Interior Fan Motor
[b] INTERIOR FAN MOTOR 1) Unplug the unit. Interior Fan Motor 2) Disconnect Interior Motor Insulation Tube connector (blue) beside the Refrigeration Unit. 3) Unscrew the Refrigeration Unit. Air Duct 4) Slightly lift up the Refrigeration Unit, and put the Interior Fan Motor leads inside the cabinet. -
Page 50: [B] Hinge Spacer
[b] HINGE SPACER For Door closing adjustment, the Hinge Spacers (clear, colorless plastic plates) 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: For Upper Hinge: Hinge Spacer (A) -
Page 51: Condenser Cleaning Pan
7. CONDENSER CLEANING PAN The Condenser is designed to allow the Cleaning Pan at the bottom. * Insert the Cleaning Pan (wastewater pan), and connect the Drain Hose to the drain outlet. Use the Cleaning Pan (A) for the 280 mm wide Condenser [HRE-70B, HRE-140B, HFE-70B], and connect the Cleaning Pan (A) and Cleaning Pan (B) for the 500 mm wide Condenser [HFE-140B]. -
Page 52: [B] Gastronome Pan Rail
Door Hinge (L) - Up 339971G01 1 pc Hinge Collar - Hinge 339948-01 2 pcs [b] GASTRONOME PAN RAIL Rail (R) 369511M01 Rail (L) 369512M01...
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