NO.
E4AA-657
ISSUED: JUN. 29, 2004
REVISED: AUG. 20, 2004
HOSHIZAKI
UNDERCOUNTER
REFRIGERATOR/FREEZER
SERVICE MANUAL
MODEL
RTE-80SFA(-UK)
RTE-125SFA(-UK)
RTE-170SFA(-UK)
FTE-80SFA(-UK)
FTE-125SFA(-UK)
FTE-170SFA(-UK)
Page 1: ...NO E4AA 657 ISSUED JUN 29 2004 REVISED AUG 20 2004 HOSHIZAKI UNDERCOUNTER REFRIGERATOR FREEZER SERVICE MANUAL MODEL RTE 80SFA UK RTE 125SFA UK RTE 170SFA UK FTE 80SFA UK FTE 125SFA UK FTE 170SFA UK ...
Page 2: ...ECTRONIC CONTROLS 19 a SET POINT TEMPERATURE 19 b CABINET TEMPERATURE DIFFERENTIAL 19 c DEFROST CYCLE 19 d DEFROST COMPLETION TEMPERATURE 19 e CLOGGED CONDENSER DETECTION TEMPERATURE 19 f TEMPERATURE DISPLAY CYCLE 19 g COMPRESSOR SOFT START 20 h CABINET TEMPERATURE AND TEMPERATURE DISPLAY 20 i RESOLUTION 21 j CHECKING AND ADJUSTING SET POINT TEMPERATURE 21 k MANUAL DEFROST 21 l CANCELING SOFT STAR...
Page 3: ...R FAN MOTOR 34 5 THERMISTORS 35 a INTERIORTHERMISTOR 35 b DEFROST THERMISTOR 35 c CLOG THERMISTOR 35 6 DOOR GASKET 36 a REMOVAL 36 b REPLACEMENT 36 Symbol Meaning Keep Dry Cabinet Temperature Increasing Temperature Decreasing Temperature Manual Defrost Rapid Refrigeration ...
Page 4: ... cleaning be sure to unplug the unit or disconnect the main power supply before servicing the unit to prevent electric shocks 3 If the unit must be energized for inspection of the electric circuit use rubber gloves to avoid contact with any live parts resulting in electric shocks 4 Keep the following in mind when servicing the refrigeration circuit 1 Be sure to recover the refrigerant Do not disch...
Page 5: ...d connectors or the like with their closed ends up to avoid entrance of moisture that could lead to electric leaks or fire 6 After servicing always use a megohmmeter 500V DC to check for the insulation resistance of at least 1 megohm between the live part attachment plug and the dead metal part grounding terminal 7 Do not service the electrical parts with wet hands to prevent electric shocks 8 The...
Page 6: ... stainless steel with some in between space filled with urethane foam for thermal insulation To allow access to the interior the openings at the front are provided with doors made of stainless steel on both the interior and exterior and filled with urethane foam for thermal insulation The evaporator compartment is also equipped with an opening at the front to provide access for removal of the evap...
Page 7: ...hed to the cabinet the anti condensation frame heater the compressor condenser fan motor interior fan motor defrost heater transformer and temperature control thermistor in the refrigeration circuit the controller board relays fuse and ground fault interrupter in the control box 3 MODEL NAME R T E 80 S F A UK UK Model TheonlydifferencesbetweentheUKmodelsand other models are this appliance type cod...
Page 8: ... Circulation Fan Motor 13W Glass Tube Heater COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic 215W Model FR8 5G Fin and Tube type 8 tubes high 4 rows deep Fan Motor 4P 8W Fin and Tube type 10 tubes high 3 rows deep Capillary Tube 1 0mm DIA x 2 0mm DIA x 3000mm long R134a 245g CABINET TEMPERATURE CONTROL DEFROST CONTROL Microprocessor Adjustable from 6 to 12 C Micropr...
Page 9: ...tion Fan Motor 13W Glass Tube Heater COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic 215W Model FR8 5G Fin and Tube type 8 tubes high 4 rows deep Fan Motor 4P 8W Fin and Tube type 10 tubes high 3 rows deep Capillary Tube 1 0mm DIA x 2 0mm DIA x 3000mm long R134a 245g CABINET TEMPERATURE CONTROL DEFROST CONTROL Microprocessor Adjustable from 6 to 12 C Microprocessor ...
Page 10: ...tion Fan Motor 13W Glass Tube Heater COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic 215W Model FR8 5G Fin and Tube type 8 tubes high 4 rows deep Fan Motor 4P 8W Fin and Tube type 10 tubes high 3 rows deep Capillary Tube 1 0mm DIA x 2 0mm DIA x 3000mm long R134a 245g CABINET TEMPERATURE CONTROL DEFROST CONTROL Microprocessor Adjustable from 6 to 12 C Microprocessor ...
Page 11: ...tion Fan Motor 13W Glass Tube Heater COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic 495W Model SC12CL Fin and Tube type 8 tubes high 4 rows deep Fan Motor 4P 8W Fin and Tube type 10 tubes high 3 rows deep Capillary Tube 1 0mm DIA x 2 0mm DIA x 3000mm long R404A 240g CABINET TEMPERATURE CONTROL DEFROST CONTROL Microprocessor Adjustable from 25 to 7 C Microprocessor ...
Page 12: ...ation Fan Motor 13W Glass Tube Heater COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic 495W Model SC12CL Fin and Tube type 8 tubes high 4 rows deep Fan Motor 4P 8W Fin and Tube type 10 tubes high 3 rows deep Capillary Tube 1 0mm DIA x 2 0mm DIA x 3000mm long R404A 240g CABINET TEMPERATURE CONTROL DEFROST CONTROL Microprocessor Adjustable from 25 to 7 C Microprocessor...
Page 13: ...ion Fan Motor 13W x 2 Glass Tube Heater COMPRESSOR CONDENSER EVAPORATOR REFRIGERANT CONTROL REFRIGERANT CHARGE Hermetic 495W Model SC12CL Fin and Tube type 8 tubes high 4 rows deep Fan Motor 4P 8W Fin and Tube type 10 tubes high 3 rows deep Capillary Tube 1 0mm DIA x 2 0mm DIA x 3000mm long R404A 270g CABINET TEMPERATURE CONTROL DEFROST CONTROL Microprocessor Adjustable from 25 to 7 C Microprocess...
Page 14: ...11 5 DIMENSIONS a RTE FTE 80SFA UK ...
Page 15: ...12 b RTE FTE 125SFA UK ...
Page 16: ...13 c RTE FTE 170SFA UK ...
Page 17: ...14 II TECHNICAL INFORMATION 1 WIRING DIAGRAM a RTE 80 125 170SFA ...
Page 18: ...15 b FTE 80 125 170SFA ...
Page 19: ...16 2 REFRIGERATION CIRCUIT Compressor Capillary Tube Heat Exchange Condenser Condenser Fan Motor Drier Interior Fan Motor Evaporator Drain evaporator REFRIGERANT HFC R134a RTE SFA HFC R404A FTE SFA ...
Page 20: ...ow on the control box indicates dF The compressor condenser fan motor and interior fan motor will stop while the defrost heater will be energized When the defrost thermistor senses 15 C the defrost heater will turn off The compressor and condenser fan motor will be energized after 5 minutes and the interior fan motor after another 5 minutes Then after 1 minute the temperature display window indica...
Page 21: ...ol box indicates dF The compressor condenser fan motor and interior fan motor will stop while the defrost heater will be energized When the defrost thermistor senses 5 C the defrost heater will turn off The compressor and condenser fan motor will be energized after 5 minutes and the interior fan motor after another 5 minutes Then after 8 minutes the temperature display window indicates the cabinet...
Page 22: ...fferential may be 4 6 K c DEFROST CYCLE Every 6 hours Note During a defrost cycle the Temperature Display Window indicates dF See 3 SEQUENCE for further details d DEFROST COMPLETION TEMPERATURE 15 C e CLOGGED CONDENSER DETECTION TEMPERATURE 58 C for 2 minutes f TEMPERATURE DISPLAY CYCLE The Temperature Display Window renews its cabinet temperature display every 30 seconds The display remains the s...
Page 23: ...ure 2 Normal Control Power ON 3 min Compressor Condenser Fan Motor Interior Fan Motor Cabinet Temp Display ON OFF ON OFF ON OFF When the Compressor turns off during normal control it has a mandatory 3 minute delay before startup For example if the Compressor turns off by its Thermistor and the Door is opened immediately after causing the cabinet temperature to immediately exceed the restart temper...
Page 24: ...t temperature will remain the same as before when the power supply is turned back on k MANUAL DEFROST When the Manual Defrost Button is pressed the refrigerator freezer will start a manual defrost cycle The refrigerator freezer will start repeating automatic defrost cycles 6 hours after the Manual Defrost Button is pressed Note The refrigerator freezer will not start a manual defrost cycle if the ...
Page 25: ... power supply is turned off The EEPROM IC104 may be defective Replace the Controller Board b EEPROM Verify Error ED When every value retrieved from EEPROM IC104 for verification differs from the memory setting of the Controller Board ED will be displayed The ED display will automatically reset when retrieved values have been verified The EEPROM IC104 may be defective Replace the Controller Board c...
Page 26: ... function is available even during a defrost cycle The E2 display will automatically reset when the cabinet temperature rises to 2 C above the set point drops to 2 C below the set point This function is available even during a defrost cycle The E1 display will automatically reset when the cabinet temperature drops to 2 C below the set point The cause may be 1 The Doors are opened too frequently or...
Page 27: ...e Thermal Fuse is brown or 3 The Defrost Thermistor orange is defective f Abnormal Pressure E4 When the Pressure Switch turns on or the Clog Thermistor senses a temperature above 70 C the refrigerator freezer will detect an abnormal pressure to stop the Compressor for 5 The cause may be 1 The ambient temperature is too low or 2 The Interior Thermistor black is defective Differential Power ON 4 K d...
Page 28: ...st cycle The E4 display will not reset until the power supply is turned off The cause may be 1 The Condenser Fan Motor is locked or defective or 2 The Condenser Filter is clogged with too much dirt or dust g Condenser Clogged E7 When the Clog Thermistor senses a temperature Condenser outlet above 58 C for 2 minutes E7 will be displayed The E7 display will automatically reset when the Clog Thermist...
Page 29: ...r Fan Motor delay process In case of an open circuit the E8 display will automatically reset when the temperature rises above 55 C In case of a short circuit the E8 display will automatically reset when the temperature drops below 50 C The Defrost Thermistor orange may be defective and should be replaced High Clog Detection 58 C Low Temp Display Window Cabinet Temp Flashing E7 Timer starts 2 min E...
Page 30: ...be detectable immediately after startup In case of an open circuit the E9 display will automatically reset when the temperature rises above 22 C In case of a short circuit the E9 display will automatically reset when the temperature drops below 86 C The Clog Thermistor grey may be defective and should be replaced Short Circuit Detection 86 C Temp Display Window Cabinet Temp Flashing E9 Timer start...
Page 31: ...tly heat leakage is minimized especially at the Door Gasket and the Compressor OFF time is extended resulting in an energy saving operation To quickly refrigerate stored items select the rapid refrigeration mode NORMAL OPERATION Intermittent Fan Motor Cord Heater Operation RAPID REFRIGERATION Continuous Fan Motor Cord Heater Operation Cabinet Temp Max Min Set Point Temp Solenoid ON OFF ON OFF Cabi...
Page 32: ...on Keep pushing the Rapid Button for 5 seconds The decimal point on the Temperature Display Window will disappear during rapid refrigeration To Cancel Rapid Refrigeration Keep pushing the Rapid Button for 5 seconds The decimal point will reappear on the Temperature Display Window Once the rapid refrigeration mode is selected the Controller Board will memorize the setting even after the power suppl...
Page 33: ...Part Model 11 0W 3R6831 01 RTE 80 15 5W 3R6831 02 RTE 125 20 0W 3R6831 03 RTE 170 19 8W 3R6832 01 FTE 80 27 9W 3R6832 02 FTE 125 36 0W 3R6832 03 FTE 170 Anti condensation Mullion Heater W Part Model 8 4W 4R2741 01 RTE 125 170 14 4W 4R2743 01 FTE 125 170 ...
Page 34: ...e Control Box 4 Remove the hexagon head bolt with washer 5x10 on the front of the Refrigeration Unit Base and the two hexagon nuts stainless steel M6 on the Evaporator Box Panel 5 Pull out the Refrigeration Unit Base Be careful not to damage the refrigeration circuit 6 To replace the removed parts reverse the above removal procedure Note 1 When pulling out or pushing in the Refrigeration Unit Base...
Page 35: ...revent refrigerant leaks and corrosion at the welded parts c EVAPORATOR AND DEFROST HEATER 1 Pull out the Refrigeration Unit Base according to steps 1 through 5 of 1 REFRIGERATIONUNIT 2 Recover the refrigerant from theAccess Valve and store it in a proper container if required by an applicable law 3 Remove the Defrost Thermistor from the top of the Evaporator 4 Remove the truss head tapping screw ...
Page 36: ... a proper container if required by an applicable law 3 Remove the Evaporator Box Panel and the Panel Bracket A from the Shroud on top of the Condenser by unscrewing the two hexagon head bolts with washers 5x10 4 Remove the Shroud from the Condenser by unscrewing the six truss head tapping screws 4x8 5 Remove the six truss head tapping screws 4x8 securing the Condenser 6 Disconnect the Condenser fr...
Page 37: ...2 Disconnect the Condenser Fan Motor leads 3 Remove the Condenser Fan Motor with the Bracket by unscrewing the four truss head tapping screws stainless steel 4x8 4 Take the Condenser Fan Motor off the Bracket 5 To replace the removed parts reverse the above removal procedure b INTERIOR FAN MOTOR 1 Pull out the Refrigeration Unit Base according to steps 1 through 5 of 1 REFRIGERATIONUNIT 2 Remove t...
Page 38: ...he Thermistor leads 4 To replace the removed parts reverse the above removal procedure b DEFROST THERMISTOR 1 Pull out the Refrigeration Unit Base according to steps 1 through 5 of 1 REFRIGERATIONUNIT 2 Remove the Defrost Thermistor together from the top of the Evaporator 3 Disconnect the Thermistor leads 4 To replace the removed parts reverse the above removal procedure c CLOG THERMISTOR 1 Pull o...
Page 39: ...ater on the Door Pack Channel with a sprayer 2 Fit the four corners of the Door Gasket into those of the Door Pack Channel 3 Push in each part of the Door Gasket from both sides Note After fitting the Door Gasket check every part for tightness and secureness Sprayer Door Gasket Door Pack Door Pack Channel Door ...
Page 40: ...HOSHIZAKI ELECTRIC CO LTD 3 16 MINAMIYAKATA SAKAE TOYOAKE AICHI 470 1194 JAPAN PHONE 0562 97 2111 HOSHIZAKI EUROPE LTD UNIT A STAFFORD PARK 18 TELFORD SHROPSHIRE TF3 3DJ ENGLAND PHONE 01952 291777 ...
