COMMERCIAL SERIES

Commercial Series

Must reach over behind Front Panel to access: Single and Dual Section

NAMEPLATE: Single and Dual Section

Commercial Series

Power switch & Nameplate location:

Commercial Series

Nylon Gravity Closer with Stay open feature, Beginning in Oct. 2010 and Newer have new spring loaded hinges.

Ducted Airflow (If removing be careful not to break the Duct Stand Off as you have to pinch it to remove Duct)

One Piece

ABS Interior

A.

B.

C. D.

A. Remove Screws Completely

B. Remove while supporting

Evaporator Fan Shroud

C. Slowly Drop Fan Shroud while pulling forward to release “D” drain

Commercial Series ACCESSING EVAPORATOR

Note: If updating the unit with a drain heater order part HS-3567 and insert it through the shroud “D” and into the cabinet drain pipe approx. 8.5” secure the drain heater to evaporator shroud rear flange with aluminum tape see example at the right, route wires with the defrost thermostat wires and wire the heater in parallel with Defrost heater.

Defrost Thermistor (bottom of Evap.)

Evap. Fan Shroud Cabinet Thermistor: Be careful when

dropping Evap. Shroud

Cabinet Thermistor : Mounted inside Shroud

Commercial Series

To check thermistor resistance, follow the steps below. 1) Move the power switch to the "OFF" position, then unplug the appliance. 2) Remove the control box cover. 3) Disconnect and remove the thermistor in question. 4) Immerse the thermistor sensor portion in a glass containing ice and water for 2 to 3 min. 5) Check the resistance between the wires at the thermistor connector. Normal reading is within 16.0 to 16.7 kΩ. If outside the normal reading, replace the thermistor.

Compressor Condenser Evaporator Fan Motor Stainless Condensate Pan

Coated Copper Coil & Lockdown strap

Drier

“A” Series Cap tube / “B” Series Expansion Valve

Cap Tube

CR & CF Refrigeration System

CR & CF Condensate Pump

Beckett Pump Power

Wire harness from Float

Condensate water In

Hose to Condensate drain pan

“Overflow” to pan underneath

NOTE: If replacing pump order HS-

NOTE: Service replacement part # SP-5080 Must change both pump motor and float!!!

COMMERCIAL REFRIGERATOR SEQUENCE

SWITCH ON

Slight delay occurs (the 2 hour hi-temp. alarm is bypassed at startup , therefore a Hi

temp. alarm could occur ) Reset: press upper button alarm display will clear after temp. is

within Factory parameters.

COOLING STARTED

After 2 min. compressor delay the Evap. Fan & the Mullion Heaters energize. Display, Compressor & Condenser Fan come on

COOL DOWN ACHIEVED

Cabinet Thermistor cools to 3° F below set point Evap. Fan & Mullion Heaters continue , Comp. &

Condenser Fan de-energize

COOL DOWN RESTART

Cabinet Thermistor warms to 3° F above set point , Evap. Fan & Mullion Heaters continue, Comp. &

Condenser Fan energize

DEFROST (display shows DEF)

20 minute minimum /1 hr. maximum

INITIATION Defrost Thermistor cools to 8.6°F defrost begins,

Evap. Fan Motor & Mullion Heaters continue Compressor & Condenser Fan de-energize

TERMINATION

Defrost Thermistor warms to 40°F Evap. Fan & Mullion Heaters continue, Compressor &

Condenser Fan energize 2 minute temperature display delay timer starts.

NOTE Defrost Manual Initiation: Press and hold lower button until “DEF”

displays Evap. Fan & Mullion Heaters continue,

Compressor & Condenser Fan De-energize

COMMERCIAL REFRIGERATOR SEQUENCE

COMMERCIAL FREEZER SEQUENCE

SWITCH ON

Slight delay (the 2 hour hi-temp. alarm bypassed, therefore a Hi temp. alarm could occur at startup) Reset: press upper button

alarm display will clear after temp. is within Factory parameters.

COOLING STARTED

After 2 min. compressor delay the Evap. Fan & the Mullion Heaters, and Perimeter heaters energize, Display, Compressor &

Condenser Fan come on

COOL DOWN ACHIEVED

Cabinet Thermistor cools to 3° F below set point Evap. Fan & Mullion & Perimeter Heaters continue , Comp. & Condenser Fan de-energize

COOL DOWN RESTART

Cabinet Thermistor warms to 3° F above set point , Evap. Fan & Mullion & Perimeter

Heaters continue, Comp. & Condenser Fan energize

DEFROST (TEMP. & TIME TERMINATED) (display shows dEF)

5 minute minimum 1 hr. maximum

INIATION

Defrost Thermistor cools to 32°F, starts 4 hour cumulative Compressor run timer, when timer times 4 hours and DTH is at

or below 32°F defrost begins, Defrost Heater de-energizes Mullion & Perimeter Heaters continue Compressor &

Condenser Fan & Evap. Fan de-energize. TERMINATION

Defrost Thermistor warms to 59°F, starts 3 min. Compressor Delay, 8 min. Evap. Fan delay, and 13 min. Display timer delay,

Mullion & Perimeter Heaters continue, Defrost Heater de-energizes. 3 min. timer terminates Compressor & Condenser

Fan energize, 5 min. later 8 min. Evap. Fan delay timer terminates Evap. Fan energizes, 5 min. after fan starts , 13 min. temperature display delay timer terminates and cabinet temp.

returns to Display module.

NOTE Defrost Manual Initiation: Press and hold lower button until “DEF” displays

Mullion & Perimeter Heaters continue, defrost heater energizes, Compressor & Condenser & Evap. Fan De-

energize

4 hour Minimum defrost interval

COMMERCIAL FREEZER SEQUENCE

COMMERCIAL CHEAT SHEET CLICK BELOW FOR PRINTABLE VERSON

•Danfoss Solid State Controller

•Temperature default is °F can be changed to show °C

•Cabinet temperature is updated every 20 seconds.

•To change from °F to °C simple: Press and hold upper button for 5 sec. then release and push upper button again to change setting to °C, wait a few seconds and current cabinet temp will be shown in new setting.

Original Commercial Controller

Original Commercial Controller

Adjusting Temp. Set point

To Adjust set point Press upper or lower button briefly and release. The current temperature set point will flash, press the upper or lower button until desired temp. is displayed. Then wait a few seconds, the display will return to current cabinet temp. and set point is now saved.

•Factory setting for refrigerators is 36°F (2°C)

•Factory setting for freezers is -4°F (-20°C)

•Temperature Differential +/-3°F

Original Commercial Controller

Change from ºF to º C

Change temperature Set Point

New Danfoss Controller

DEFROST New Danfoss Controller

• Refrigerator- off cycle defrost, defrost Icon will light up • Time initiated once every 2 hours • Terminates when defrost thermistor reaches 40°F (4.4°C) • Defrost minimum time is 20 minutes, maximum 1 hour

• Freezer- heated defrost, defrost Icon will light up and “def” will be displayed • Initiated by temperature/compressor run-time • Temperature initiated defrost thermistor reaches 32°F (0°C), compressor

initiated happens when cumulative compressor run time equals 4 hours without a defrost

• Terminates when defrost thermistor reaches 59°F (15°C), a 3 min. Compressor delay timer starts, a 7 min. evaporator fan delay starts, and an 18 min. temperature delay timer start NOTE: the 7min. evap. fan delay is a max., if thermistor cools to 25ºF (3.9ºC) before 7min. timer terminates the evap. fan will energize

• Defrost minimum time is 20 minutes, maximum 1 hour Manual Defrost can be achieved by pressing manual defrost button

Safety Devices New Danfoss Controller

• Automatic reset High pressure - interrupts compressor power • Compressor short cycle time - 2 minutes minimum • Alarm Codes:

We hope that this gives you a good understanding of the operation for the Commercial series units. If you

have any questions concerning this or any other technical information please send e-mail to

techsupport@hoshizaki.com or call the Technical Support Department at 1-800-233-1940.