Sub Zero CSO24 Convection Steam Oven

Specifications

• Model: Convection Steam Oven (CSO24)
• Revision: A
• Year: January, 2012

Product Usage Instructions

• Troubleshooting Guides
  • The troubleshooting guides provide detailed information on various error codes, diagnostics, and possible causes.
• Handling Sheet Metal Parts
  • When handling sheet metal parts, be cautious as the edges may be sharp. Use appropriate protection to avoid injury.

FAQs

• Q: What should I do if I encounter an E01 error code?
  • A: An E01 error indicates a problem with the processor due to moisture or EMC influences. Follow the recommended steps to address the issue:
    • Read error (after 50 tries): Check for moisture or EMC interference, and take necessary actions.
• Q: How do I troubleshoot an E09 error related to the cooking space temperature sensor?
  • A: An E09 error points to a short circuit in the PT sensor or its wiring. To resolve this issue:
    • Check for any short circuits in the PT sensor or wiring.
    • If the sensor has too low of a resistance, investigate potential causes and address them accordingly.
• Q: What does an E17 error signify regarding food temperature?
  • A: An E17 error indicates issues with the food probe or its wiring. Here’s what you can do:
    • Check for short circuits in the food probe or wiring.
    • If the food probe has too low of a resistance, troubleshoot potential causes and rectify them.
• Q: How can I troubleshoot an E25 error related to climate temperature?
  • A: An E25 error suggests problems with the climate sensor or its wiring. To address this error:
    • Look for short circuits in the climate sensor or wiring.
    • If the sensor has too low of a resistance, examine possible causes and resolve them.

“`

Troubleshooting Guides

Convection Steam Oven (CSO24)

NOTES: · If the appliance has an error, that error code will appear on the display when it is happening to the appliance
without entering diagnostic mode. · Though not listed, the cause of all error codes could be the result of, in rare cases, other factors such as:
– Faulty wiring e.g. through a short circuit, break, loose contact, earth contact, etc. – Problems with the electronics assembly groups, caused by moisture, dirt, component failure, EMC influ-
ences, etc. · Before continuing, please take note of the WARNINGS and CAUTIONS below.

· TO AVOID ELECTRIC SHOCK, NEVER TOUCH ANY PART OF THE ELECTRICAL CIRCUIT WITH HANDS OR UN-INSULATED TOOLS WHILE THE POWER IS CONNECTED.
· FAILURE TO INSTALL THE MOUNTING SCREWS CAN ALLOW THE OVEN TO TIP FORWARD DURING USE!

Be careful when handling sheet metal parts – Edges may be sharp.

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Convection Steam Oven (CSO24)

Troubleshooting Guides

Error Code

Massage

Diagnostic OfError (Through Microcontroller)

Possible Cause (Ranked by Frequency)

E01

F5 EEPROM

1. Problems with processor, caused by moisture or EMC influ-

Read error (after 50 tries)

ences.

E02

F5 EEPROM

1. Problems with processor, caused by moisture or EMC influ-

Write error (after 10 tries)

ences.

E03

F5 FLASH

1. Loaded incorrect process data. Reload process data.

Incorrect process data

(device ID number)

E04

F5 FLASH

1. Process data error. Reload process data.

Incorrect process data

(checksum)

E05

F5 FLASH

Incorrect firmware

(checksum)

1. Firmware error. Reload firmware or replace processor.

E06

—

SOFTWARE

Watchdog reset

1. Processor faulty.

E09

F0 Cooking Space

1. Short circuit in PT sensor or in its wiring.

Temperature

Sensor with too low of a

resistance

(temp. < ca. -4°F/-20°C)

E10

F0 Cooking space

1. Break or loose contact in PT sensor or in its wiring.

temperature

Sensor with too high of a

resistance

(temp. >ca. 1472°F/800°C)

E11

F0 Cooking space

1. Processor faulty.

temperature

Reference with too low of

a resistance

E12

F0 Cooking space

1. Processor faulty.

temperature

Reference with too high of

a resistance

E13

—

Cooking space

1. Electromagnetic disturbances – Replace processor.

temperature

2. Heating and main relay short circuited – Replace processor.

Temperature

> 662°F/350°C

during Off / Standby Mode

E17

F1 Food temperature

1. Short circuit in food probe or in its wiring.

Food probe with too low of 2. Food probe not inserted into food, tip too hot.

a resistance

3. Moisture in food probe socket.

(temp. > ca. 446°F/230°C)

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Troubleshooting Guides

Convection Steam Oven (CSO24)

Error Code

Massage

Diagnostic OfError (Through Microcontroller)

Possible Cause (Ranked by Frequency)

E18

F1 Food temperature

1. Break or loose contact in food probe or in its wiring.

Food probe with too high

of a resistance

(temp. < ca. -20°C)

E25

F3 Climate temperature

1. Short circuit in climate sensor or in its wiring.

Sensor with too low of a 2. Exhaust duct blocked.

resistance

3. Duct between cooking space and sensor blocked.

(temp. > ca. 509°F/265°C)

E26

F3 Climate temperature

1. Break or loose contact in climate sensor or in its wiring.

Sensor with too high of a 2. Exhaust duct blocked.

resistance

3. Duct between cooking space and sensor blocked.

(temp. < ca. 28°F/-2°C)

E27

F17 Climate temperature

1. Hairline crack in climate sensor.

Temperature

> 356°F/180°C

for 60 seconds

E29

F9 Climate temperature

1. Cooking space not tightly sealed (door not closed properly,

3 times measured

exhaust slide valve not tight, food probe socket is defective).

temperature differential of 2. Too much cold food in the cooking space (when steaming,

less than 41°F/5°C during weight of frozen food should not exceed 3kg).

180-second monitoring 3. Food probe socket dirty / wet.

cycle (active monitoring 4. Hot air fan seal is missing or faulty. To check: remove the hot air

only during first 20 minutes panel and rotor (caution: left-hand thread).

after start as well as with

climate temperature of

over 194°F/90°C)

E33

F12 Processor temperature 1. Processor faulty.

Sensor with too low of a

resistance

(temp. > ca. 392°F/200°C)

E34

F12 Processor temperature 1. Processor faulty.

Sensor with too high of a

resistance

(temp. < ca. 3°F/-16°C)

E35

F13 Processor temperature 1. Niche temperature too high (caused by second appliance?).

Temperature > 185°F/85°C 2. Cool air fan failure.

for 60 seconds

3. Power failure during baking process.

E36

F14 Control unit

1. Control unit faulty.

temperature

Sensor with too low of a

resistance

(temp. > ca. 200°C)

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Troubleshooting Guides

Error Code

Massage

Diagnostic OfError (Through Microcontroller)

Possible Cause (Ranked by Frequency)

E37

F14 Control unit

1. Control unit faulty.

temperature

Sensor with too high of a

resistance

(temp. < ca. 3°F/-16°C)

E38

F15 Control unit

1. Niche temperature too high (caused by second appliance?).

temperature

2. Cool air fan failure.

Temperature > 185°F/85°C 3. Power failure during baking process.

for 120 seconds

E41

F2 Water temperature

1. Short circuit in water temperature sensor or in its wiring.

Sensor with too low of a 2. Boiler leaking water.

resistance

(temp. > ca. 392°F/200°C)

E42

F2 Water temperature

1. Break or loose contact in water temperature sensor or in its

Sensor with too high a

wiring.

resistance

(temp. < ca. 14°F/-10°C)

E44

F7 Water temperature

1. Break in flange (fastening screws not tightened enough, etc.).

Increase in temperature 2. Heating element for boiler is faulty. Over-temperature protection

to min. 180°F/85°C within

activated (caution: one of which is self-resetting).

185-seconds (active

3. Food probe socket dirty / wet.

monitoring only when

4. Boiler very scaled up. Descale.

temperature below

185°F/85°C)

E49

F10 Control unit

1. Button is mechanically blocked or jammed.

Button(s) closed for min. 2. Moisture on the control unit.

60 seconds

E50

F10 Control unit

1. Moisture on the control unit.

Moisture sensor closed

for min. 20 seconds

E51

F6 Processor

1. Quit error in the case of appliances with K3.20398-0 or

Neutral conductor to

K3.20398-1 software. Message probably caused by software

main relay (N’) records

error.

error

2. Wrong connection of neutral and pole conductor in case of

1­phase connection (Applies for appliances with processor with

version smaller -2).

3. Processor faulty.

E52

F10 Leaked water detection 1 Water tank valve not tight.

Leaked water detected

for min. 10 seconds

E57

U0 Mains connection

Voltage N > 340V

1. Pole conductor connected to neutral conductor terminal. 2. Neutral conductor break in the house wiring system. 3. Mains calibration error (see error code E63).

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Troubleshooting Guides

Convection Steam Oven (CSO24)

Error Code

Massage

Diagnostic OfError (Through Microcontroller)

Possible Cause (Ranked by Frequency)

E58

U1 Mains connection

L2 no signal

1. No pole conductor connected to L2 clamp. 2. Circuit breaker or fuse in house wiring system activated.

E59

U0 Mains connection

1. Overvoltage in mains power supply.

Voltage > 270VAC for 1 2. Neutral conductor break in the house wiring system.

second

3. Mains calibration error (see error code E63).

E61

U2 Mains connection

1. Undervoltage in mains power supply.

Voltage < 170VAC for 1 2. Mains calibration error (see error code E63).

minute

E62

U3 Mains connection

Voltage < 150VAC

1. Undervoltage in mains power supply. 2. Mains calibration error (see error code E63).

E63

—

Mains calibration

1. No calibration of mains voltage. Replace processor.

E66

—

Water system

1 . Boiler scaled up.

If it has been a while

since last descaling:

Level detector pin with

low resistance only after

refilling (occurring at least

6 times consecutively)

E67

F20 Water system

1. Boiler scaled up.

If descaling was carried 2. Silicon hose kinked.

out recently:

Level detector pin with

low resistance only after

refilling (occurring at least

6 times consecutively)

E68

—

Water system

1. Boiler scaled up.

If it has been a while

2. Inlet valve leaking (valve not tight, limescale fragments in seal,

since last descaling:

etc.)

Pumping off water at

3. There could be foam in the boiler housing (especially after

least 3 times within 2

descaling).

hours

E69

F21 Water system

1. Boiler scaled up.

If descaling was carried 2. Inlet valve leaking (valve not tight, limescale fragments in seal,

out recently:

etc.)

Pumping off water at

3. There could be foam in the boiler housing (especially after

least 3 times within 2

descaling).

hours

E70

—

Water system

1. Boiler scaled up.

If descaling was carried 2. Inlet valve leaking (valve not tight, limescale fragments in seal,

out recently:

etc.)

Water is not continuing to

be fed in during steaming

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Troubleshooting Guides

Error Code

Massage

Diagnostic OfError (Through Microcontroller)

Possible Cause (Ranked by Frequency)

E71

F22 Water system

1. Boiler scaled up.

If descaling was carried 2. Inlet valve leaking (valve not tight, limescale fragments in seal,

out recently:

etc.)

Water is not continuing to

be fed in during steaming

E72

—

Water system

1. Drain pump pumping off too little water.

If it has been a while

2. Water conductivity too low.

since last descaling:

3. Foam in boiler housing (unsuitable descaling agent).

Level detector pin with

high resistance again

after pumping off water 5

times

E73

F23 Water system

1. Drain pump pumping off too little water.

If descaling was carried 2. Water conductivity too low.

out recently:

3. Foam in boiler housing (unsuitable descaling agent).

Level detector pin with

high resistance again

after pumping off water 5

times

E74

—

Water system

1. No descaler added.

Descaling error during

2. Error in measurement of level (possibly due to formation of

descaling phase

foam).

(appliance is blocked)

E75

—

Water system

1. No or insufficient amount of water for rinsing.

Descaling error during 1 2. Excessive build-up of foam.

st rinsing phase

(appliance is blocked)

E76

—

Water system

1. No or insufficient amount of water for rinsing.

Descaling error during

2. Excessive build-up of foam.

2nd rinsing phase

(appliance is blocked)

E81

—

Relay calibration

1. No calibration of relay. Replace processor.

E85

F4 Slide motor

Motor current shows

short circuit

1. Short circuit in slide motor or in its wiring.

E86

F4 Slide motor

Motor current shows

break

1. Break or loose contact in slide motor or in its wiring.

E87

F4 Exhaust air slide valve 1. Exhaust slide valve stuck with grease deposits.

Path of slide valve

2. Motor or slide valve jammed (mechanical defect).

restricted (motor current 3. Short circuit in slide motor or in its wiring.

error during slide valve

test)

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Troubleshooting Guides

Convection Steam Oven (CSO24)

Error Code

Massage

Diagnostic OfError (Through Microcontroller)

Possible Cause (Ranked by Frequency)

E88

—

Exhaust air slide valve 1. Exhaust slide valve stuck with grease deposits.

Path of slide valve

2. Motor or slide valve jammed (mechanical defect).

restricted during normal

operation (motor current

shows current reduction)

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Convection Steam Oven (CSO24)

Troubleshooting Guides

2 Malfunctions/Messages Without Error Codes

Display Text Insert water tank

Possible Cause (Ranked by Frequency)
1. Water tank is missing. 2. Water tank not in end position or faulty. 3. Mechanical lock damaged or missing. 4. Switch holder broken off or warped. 5. Break in switch contact or in its wiring.

Fill water tank
Pour away descale, add 40.9 oz (1.2 l) water
Pour away water, add 40.9 oz (1.2 l) water

1. No water in tank. 2. Water tank not inserted correctly. 3. Water inlet blocked or scaled up. 4. Inlet valve jammed or faulty. Hose is squashed. 5. Faulty level detector pin wiring. 6. Break in earth conductor of heating element of boiler or in processor.

Please close door

1. Door is open. 2. Magnet in door is not in correct position or has come away. 3. Reed switch or its holder not mounted correctly. 4. Door will not close properly too (e.g. because of faulty door seal). 5. Break in door contact or in its wiring.

Insert food probe

1. Food probe is not plugged in. 2. Loose contact in food probe socket. 3. Wiring of food probe socket is faulty.

Boiler scaled up, please descale!

1. Boiler scaled up (reached max. number of operating hours for boiler). 2. Problems in the water system (see also E66, E68, E70 and E72 error
codes).

Appliance blocked, descaling neces- 1. Descale run error (see error codes E74 to E76). sary

Add 16.9 oz (0.5 l) descaler and press 1. Start not confirmed by pressing OK button. OK

Descale running

1. Descale in descaling phase.

Descale 1st rinsing cycle

1. Descale in 1st rinsing cycle.

Descale repeat 1st rinsing cycle

Descale 2nd rinsing cycle

1. Descale in 2nd rinsing cycle.

Descale repeat 2nd rinsing cycle

Descaling aborted

1. Descaling aborted (with OFF button) though not yet completed.

Pour away water, descaling completed 1. Remove water tank and empty water

*** Demo-Modus ***

1. Demo-Modus (mode used for demonstration purposes) is on.

1 Diagnostic mode is on.

1. Diagnostic mode is on. 5-9

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Troubleshooting Guides

Convection Steam Oven (CSO24)

3. Malfunctions Without Fault Displays//Messages

Malfunction Heating element(s) not heating up.

Possible Cause (Ranked by Frequency)
1. Heating element(s) or the corresponding wiring is faulty. 2. Demo-Modus is activated.

From time to time, strange (illegible) 1. Moisture in LCD due to steam penetrating panel area. characters appear in the text display. 2. Loose or faulty plug and socket connection or ribbon cable.
3. Faulty LCD (FPC connector with loose contact).

From time to time, control unit with a 1. Moisture in control unit due to steam penetrating panel area.

strange display.

2. Loose or faulty plug and socket connection or ribbon cable.

Water being pumped back even though water tank not in place

1. Water tank detection switch caught on housing.

Large quantity of residual water in water tank compartment

1. Appliance being operated without lid on water tank.

Heavily build-up of condensate later- 1. Door not closed firmly enough.

ally externally or in condensate con- 2. Door seal fitted incorrectly or damaged.

duit

3. Door hinge faulty or damaged. Check closing force.

Appliances with the K3.20398-1 soft- 1. Immediate remedy: Cancel the operation and reset selection. ware release: With an operating mode 2. Install processor with software version 2 or higher. with a set switch-off time and a preset food temperature, the appliance starts immediately (without waiting out the delayed start) if, during the delayed start, the food probe is unplugged and then plugged back in again.

4 Switching Demo-Modus ON/OFF

Requirements: In order to switch the Demo Modus (Showroom Mode) ON / OFF, the appliance must be ready for operation, i.e. all displays – with the exception of the time display ­ should be dark/off.

To Turn ON:

1. Press and hold the “LIGHT” + “OK” + “OFF” buttons for ten (10) seconds. NOTE: press and hold the buttons in the order listed. a «Demo-Modus» «off» appears in the display.
2. Using the adjusting “OK” knob set the display to «Demo-Modus» «on». 3. Press the “OK” knob to confirm the change in setting. Press the “Off” button to exit the configu-
ration mode.

To Turn OFF:

1. Press the “LIGHT” + “OK” + “OFF” buttons simultaneously. «Demo-Modus» «on» appears in the display.
2. Using the adjusting knob set the display to «Demo-Modus» «off». 3. Press the “OK” button to confirm the change in setting. Press the “Off” button to exit the con-
figuration mode.

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Convection Steam Oven (CSO24)

Troubleshooting Guides

Diagnostic Mode
This mode shows only error history and different time information. If the appliance has an error, that error code will appear on the display when it is happening to the appliance without entering diagnostic mode.

Requirements: In order to turn the diagnostic mode on / off, the appliance must be OFF (all displays – with the exception of the time display – should be dark) or in the error mode (error message is displayed).

To Turn ON: Menu

– Press and hold the “LIGHT” + “OK” buttons for ten (10) seconds. «Diagnostic mode» «Error history» appears in the display.
– Use the “OK” adjusting knob and button to navigate the menu (see table below).

To Turn OFF:

– Press the “Off” button. Alternatively, the diagnostic mode turns off automatically after 1 hour.

Menu Level 1
Diagnostic mode Error history

MENU STRUCTURE

Menu Level 2

Description

Error history Error history is empty.

No history entries

Error history ww) xxx / yyy

zzzzzhzz

ww: xxx:
yyy:
zzzzzhzz::

Entry number. Error code of malfunction that has occurred (e.g. E03). Error message of malfunction that has occurred (e.g. F05, U01 or H11). Total operating hours at the time the malfunction occurred.

Diagnostic mode Error counter

Error counter

All error counters show zero.

Error counters show zero

Error counters ww) xxx / yyy

ww:
zzz xxx: yyy:
zzz

Entry number. Error code (e.g. E03) Error message (e.g. F05 or U01) Number of events

Diagnostic mode Clear history/counter

Clear history/counter no

Do not clear error history / counters.

Clear history/counter yes

Clear error history / counters.

Diagnostic mode

Operating hours counter

Operating hours counter

Total operation xxxxxh xxxxx:

Total number of operating hours (rounded)

Diagnostic mode Event counter

Event counter Hardware reset

xxxxx xxxxx:

Number of resets

Event counter Descale

xxxxx xxxxx:

Number of times descaling performed

Diagnostic mode Version numbers

Version numbers

xx.xxxx:

Software

xx.xxxx-yy yy:

Software number Software version

Version numbers

xx.xxxx:

Process

xx.xxxx-yy yy:

Process number Process version

Version numbers Hardware xx.xxxx-yy xx.xxxx: yy:

Hardware number Hardware version

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INTRODUCTION

This Manual is a compilation of information from Wolf Inc. and V-ZUG Ltd., meant to provide the most recent technical service information about model CSO24 and CSO30 starting with serial (SWS) #13508346. This information will
enable the service technician to perform necessary repairs and return the appliance to proper operational condition.
The service technician should read the complete instructions contained in this Technical Service Manual before initiating any repairs on the Wolf Appliance.

IMPORTANT SAFETY INFORMATION
Below are the Product Safety Labels used throughout this manual. The “Signal Words” used are WARNING and CAUTION.
Please note that these safety labels are placed in areas where awareness of personal safety and product safety should be taken and lists the precautions to be taken when the signal word is observed.

INDICATES THAT HAZARDOUS OR UNSAFE PRACTICES COULD RESULT IN SEVERE PERSONAL
INJURY OR DEATH

Indicates that hazardous or unsafe practices could result in minor personal injury or product and/or property damage
In addition, please pay attention to the signal word “NOTE”, which highlights especially important information within each section.

WARRANTY INFORMATION

This page contains a summary of the 2 & 5 Year Warranty that is supplied with every Wolf product, followed by a
Non Residential Warranty Summary and then notes about the warranties.
TWO & FIVE YEAR Warranty Summary
• Two year TOTAL PRODUCT warranty, parts and labor.
• Limited Parts Only Warranty for the 3rd through 5th year.
NOTE: This warranty only applies to products installed for normal residential use in the United States or Canada.
NON RESIDENTIAL Warranty Summary (Special Application)
• Two year TOTAL PRODUCT warranty, parts and labor.
NOTE: This warranty only applies to products installed in demonstration kitchens, test kitchens, culinary and school kitchens, and other installations which help promote Wolf Appliance brand and products. Restaurant installations and other similar commercial applications carry no warranty .

60 DAY STAINLESS STEEL COSMETIC WARRANTY
• Stainless steel (doors, panels, handles, product frames and interior surfaces) are covered by a limited 60-day parts and labor warranty for cosmetic defects on any unit under normal warranty.

WARRANTY NOTES:
• All warranties begin at the time of the unit’s initial installation.
• All Warranty and Service information collected by Wolf Appliance, Inc. is arranged and stored under the unit serial number and/or the customer’s name. It is requested that you have the model and serial number available whenever contacting the factory or parts distributor.
• See Figures 1-1 & 1-2 for Rating Plate layout and location.

CONVECTION STEAM OVEN FEATURES

• Stainless steel with tubular handle.
• Can be installed in a standard or flush inset application.
• Stainless steel trim to match M series and E series ovens.
• Convection with twelve cooking modes: steam, reheat, auto steam bake, convection, convection humid, convection steam, gourmet, slow roast, recipes, my recipes, keep warm, descale and cleanse.
• Four-level rack guides with two adjustable oven racks.
• Large viewing window and halogen interior lighting.
• Temperature probe.
• Recipes mode.
• Delayed start feature and descaling program.
• Agency certified for US and Canada.
• Two and five year residential warranty—exclusions apply, see warranty information.

DISPLAY AND CONTROL PANEL

The display and control panel is streamlined and easy to use. The control knob and buttons are used to set the cooking modes and access all of the features of your convection steam oven for exceptional results.

Display Area
The convection steam oven has three display windows providing different information. The left digital display shows cooking temperature and probe setpoint. The center text display is the informational readout used for setting different modes and cooking functions. The right digital display is the clock, timer and delayed time display.
In the lower part of the display area, symbols representing temperature, probe, cooking functions and time settings will illuminate when in use.

Control Buttons
The control (“OK”) knob and buttons, including WATER, LIGHT, TEMP, MODE, TIMER, TIME and OFF allow for opening the water tank, lighting the interior and selecting operating modes, temperatures and timing functions.

Control Knob
The control (“OK”) knob is used on its own or with the control buttons to make selections. It is used to confirm any selection. A selection is always ended by pressing the control knob to confirm.
The knob’s press and turn action controls every option. Used on its own, the control knob provides direct access to user settings and cooking modes.

Example using the control knob:
1. Press the control knob. Turn 5 clicks to user settings and press to select.
2. Turn to the setting you wish to personalize and press to select.
3 Turn to your preference and press to select. Back will return you to the previous menu.

Example using the control knob with the control buttons:
1. Press the MODE button three times to select auto steam bake. The auto steam bake symbol illuminates. A recommendation for temperature flashes in the digital display.
2. Turn the control knob to select the temperature for this mode and press to confirm. Settings will be automatically accepted after ten seconds. Additional settings or changes can be made at any time.

INSTALLATION INFORMATION

This section of the manual covers some of the installation issues that a service technician may need to know when servicing a Wolf convection steam oven. If additional installation information is needed after reviewing this section of the manual please refer to the installation guide or contact the Wolf Appliance Customer Service Department. Numbers in parenthesis are in millimeters.
Overall Dimensions of CSO24 and CSO30

Installation Applications
The convection steam oven can be installed in a standard or flush inset application. The installation opening must have a flat, level base to support the oven. A minimum base support of 100 lbs (45 kg) is required. The electrical supply for the oven must be located in an adjacent cabinet with 3 feet (900 mm) of opening.

Standard Installation
For standard installations, the convection steam oven is installed by inserting into cabinetry from the front. The oven has face trim on the top and both sides that will overlap stiles and rails. Refer to the chart below for trim overlaps.

Oven Trim Overlap
Top Overlap 3/16″ (5)
Bottom Overlap 0″ (0)
Side Overlap 37/8″ (98)
24” Model 36” Model
3/16″ (5)
0″ (0)
11/16″ (18)
Flush Inset Installation
For flush inset installations, a minimum 1/8” (3) reveal is required on all sides. To ensure consistent reveals, each
corner of the opening must be exactly 90 degrees.
Notes:
• Numbers in parenthesis are in millimeters.
• Dimensions may vary by +/- 1/8” (3)

Electrical Requirements

NOTES:

• Electrical supply for the convection steam oven must be placed in an adjacent cabinet within 3′ (914 mm) of the opening. Choose the electrical location shown in the illustrations on the following pages that best suits the installation.
• Follow all National Electrical Code regulations. In addition as well as all local codes and ordinances when installing electrical service.
• Performance may be compromised if the electrical supply is less than 240 volts. A ground fault circuit interrupter (GFCI) is not recommended and may cause interruption of operation.

ELECTRICAL SHOCK HAZARD: PLUG INTO A GROUNDED 3-PRONG OUTLET. DO NOT REMOVE THE GROUND PRONG. NO NOT USE AN ADAPTER. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN ELECTRICAL SHOCK, FIRE OR DEATH!

To minimize shock hazard, the power cord must be plugged into a grounding-type receptacle, grounded to conform with the National Electrical Code, ANSI/NFPA 70 latest edition, or Canadian Electrical Code (CSA) and all local codes and ordinances. Refer to the illustrations below.

ROUGH-IN INSTALLATION SPECIFICATIONS

Standard Installation

Notes:
• Opening Width for CSO24 and CSO30 are the same.
• Minimum base support 100 lbs (45 kg).
• Electrical Supply must be located in adjacent cabinet with 3’ (914) of opening
• Dashed line represents profile of unit.
• Numbers in parenthesis are in millimeters.
• Dimensions may vary by +/- 1/8” (3)

Flush Inset Installation

Notes:
• Cleats may be visible and should be finished to match cabinetry.
• Minimum base support 100 lbs (45 kg)
• Electrical supply must be located in adjacent cabinet within 3’ (914) of opening.
• Dashed line represents profile of unit.
• Numbers in parenthesis are in millimeters.
• Dimensions may vary by +/- 1/8” (3)

INSTALLING THE OVEN
NOTE: Before moving the oven, protect any finished flooring and cabinetry to avoid damage.
1. Move the convection steam oven into position near the installation opening. Remove and discard packing materials.
2. Carefully place the oven in the opening. Resting the oven on the cabinet base support, slide the unit into the
opening until it is approximately 6″ (152) from being fully installed. Guide the power cord through the opening of
the adjacent cabinet or base support as the oven is slid into position. Verify the power cord is not trapped
between the oven and cabinet wall.
3. Once the oven is fully positioned in the opening, open the oven door and locate the four mounting holes on the
oven side trim. Refer to the illustration below. Use a 1/16″ (~1.6) drill bit to drill pilot holes into the cabinet.
4. Using the mounting screws provided, secure the oven to the cabinet.
NOTE: To avoid interference, a 90 degree door stop may be required on any appliance or cabinet door installed next
to the convection steam oven.
FAILURE TO INSTALL THE MOUNTING SCREWS CAN ALLOW THE OVEN TO TIP FORWARD DURING USE!

THEORY OF OPERATION

The Wolf convection steam oven has been developed for the highest levels of quality and ease of use. For best results the user should take a moment to become familiar with the oven’s composition, components, accessories and operation. (See Convection Steam Oven Features, and Display and Control Panel layout in Section 1)
Personalization
The oven can be personalized to suit the user’s needs and preferences. Turn the control knob to user settings to
make selections.
Language
English, French, Spanish, German, Italian, and Chinese. Turn the control knob until the desired language is displayed. Press to confirm selection.
Childproof Lock
To activate or deactivate childproof lock mode, turn the oven off, then press the control knob. Turn the knob to user
settings and press to select. Turn to childproof lock and press to select. Press to select on or off.
To use the oven by temporarily disabling the lock, press and hold the OFF button while pressing MODE and the control knob. The lock will automatically reactive ten minutes after the oven has been off.
Time Display
Visible or invisible. Invisible mode minimizes power consumption while the oven is off. The time display will disappear in approximately one minute.
Acoustic Signal
High, low or off.
Illumination
Button only or automatically with door. The cooking space can be illuminated by pressing the LIGHT button at anytime, and will turn off automatically after thirty (30) seconds.
Water Hardness
Hard, medium or soft. The oven default is for hard water. If unsure of water hardness, use the test strip provided in
the use & care guide. Additional test strips may be purchased from a local home improvement center.
Follow the instructions on the test strip to determine your water hardness then select the appropriate hardness setting.
Temperature Units
Fahrenheit (°F) or Celsius (°C).
Contrast
Select from low to high contrasts for the control panel display. There are six settings, or boxes, which light up for
increasing contrast.
Format
12-hour (am/pm) or 24-hour clock. In 24-hour mode the display is dimmed between 24:00 and 6:00.
Factory Settings
Reset. Returns all user settings to the factory preset.
Water Door Control
Button only or automatically with message. If automatically with message is selected, the water door panel will open
automatically if the water tank empties during operation. The flap may also be opened at any time by pressing the WATER button. NEVER attempt to open the water door manually.

Selecting and Changing Operating Modes
Selecting Operating Mode
1. Press the MODE button until the desired mode appears.
2. Press the control knob to confirm the mode.
Example:
a. Press the MODE button until you reach auto steam bake mode. “Auto Steam Bake—Rack 2 or 1+3” appears
in the text display. The recommended temperature flashes in the upper left digital display. The auto steam
bake and temperature symbols flash.
b. Press the control knob to confirm. “Auto Steam Bake—Steam phase” followed by “Auto Steam Bake—Hot air
phase” appears in the text display.
Changing Operating Mode
1. Press the OFF button. The selected operating mode is ended.
2. Press the MODE button to select a new operating mode.
Selecting Temperature
After a cooking mode is selected, the temperature can be set.
Selecting Cooking Temperature
1. Press the TEMP button.
2. Turn the control knob to set the desired cooking temperature and press to select.
3. Once the mode has started, you can press the TEMP button and turn the control knob to change the temperature. Press the control knob to select the temperature.

Switching Oven Off
1. Press the OFF button. The temperature and mode symbols go out. Steam is gradually released from the cooking space over 1 minute to avoid a rush of steam when the oven door is opened. The cooling fan can continue to run. “Residual heat” appears in the text display.
2. After each use, leave the oven door open in the “at-rest” position (see Figure 3-1), until the interior has cooled down. When cool, wipe the cooking space dry before closing the door. After turning off any mode utilizing steam, the display will read “Water is being pumped off”. Be sure not to remove the water tank during this time.

Auto Steam Bake
Bake just like a professional with auto steam bake mode. By heating with steam first, then using convection heat to
finish baking, bagels, breads, buns, rolls and pastries acquire a tender interior, a beautiful exterior and a natural
shine without the need for brushing with an egg wash. Auto steam bake mode temperatures range from 210°F
(99°C) to 445°F (229°C). Use this mode for breads, buns, cakes and pastries whether fresh, par-baked or frozen.
Do not preheat.
Convection
A fan creates the movement of hot air created by a heating element at the back of the oven for convection cooking to
distribute heat evenly around food for consistent results and browning. Convection also eliminates odor transfer making it ideal for cooking desserts, meats and vegetables all together.
Convection mode temperatures range from 85°F(29°C) to 445°F (229°C). Cooking temperatures versus traditional
ovens may be 25 degrees less, and times may be about 25% faster, saving valuable time and lowering energy costs.
Use convection mode for muffins, biscuits and roasts. Convection mode is also ideal for speeding up cooking time,
and for cooking different types of foods together at once to save time. For instance, add dinner rolls and aromatic
veggies like broccoli to your meat-cooking session without any odor transference to create a complete meal where
every menu item is conveniently cooked together, and is done at the same time.
Convection Humid
In convection humid mode, a heating element at the back of the oven produces heat and oven ventilation is sealed
so that moisture produced during cooking remains in the oven.
Convection humid temperatures range from 85°F(29°C) to 445°F (229°C).
Use convection humid for cakes, casseroles, grain dishes, lasagna and meats.
Convection Steam
Convection steam is great for roasting vegetables, grains or potatoes, and multiple items together, like a 12-pound
turkey with trimmings. Cook the turkey with steam, then add vegetables or potatoes, turn off steam, and it will all
roast and be done together. You control the steam supply.
Convection steam mode temperatures range from 85°F(29°C) to 445°F (229°C). Steam transfers energy to the food
more efficiently than hot air alone, which speeds up the cooking process. Food retains its own moisture and delicate
parts are more resistant to burning.
Use convection steam for any foods you want to be tender inside and roasted or crisped outside.

Gourmet
Gourmet cooks food to perfection; simply tell it what type of food you are putting inside of the oven. The climate sensor knows the amount, shape and consistency and adjusts time, temperature and humidity so no baking instructions are required.
Select your item and preferred level of doneness. After a few minutes it will tell you when your dish will be ready.
Great results are achieved easily, quickly and stress-free.
Use Gourmet to prepare any of the foods in the table at right, whether they come fresh from your garden, refrigerator, freezer or pantry:

Slow Roast
Slow roast mode is the ultimate convenience. Insert the probe into your prepared meat, select a slow roast setting, tell the oven what time you want it done, and come home to a perfectly cooked meal.

Recipes Mode
Use the recipes mode for an easy and fun way to cook entire meals from appetizers and entrees to desserts. The recipes are listed by code in the chart below.
The recipe collection harnesses the power of many different cooking modes. All you need to do is place your food into the cooking space, turn the control knob to recipes, make your selection, and choose the number of portions or level of browning. The oven determines the rest of the details for you and never overcooks, for delightful results.
The recipes mode is ideal if you are in a hurry, looking to try a new recipe, or need to prepare a variety of food for a party or social occasion.

COMPONENT ACCESS AND REMOVAL

This section explains how to access and remove components in a CSO24 and CSO30 unit. An attempt has been
made to arrange these procedures in such a way as to simulate which components would need to be removed first
in order to gain access to other components. When following a component removal procedure, it may be necessary
to reference another component removal procedures listed earlier in this section.
NOTE: Before continuing, please take note of the WARNINGS and CAUTION below.
• TO AVOID ELECTRIC SHOCK OR DEATH, POWER TO UNIT MUST BE DISCONNECTED WHENEVER
ACCESSING AND/OR REMOVING COMPONENTS POWERED BY ELECTRICITY OR COMPONENTS NEAR
OTHER ELECTRICAL COMPONENTS.
• IF NECESSARY TO REMOVE THE APPLIANCE FROM ITS INSTALLATION, REMEMBER THAT IT IS HEAVY
AND COULD TIP AND/OR FALL, RESULTING IN SERIOUS INJURY.
Be careful when handling sheet metal parts – Edges may be sharp.
Tools Needed
• 6-Lobe Torx Type Drivers – Sizes: T-10, T15, T-20
• Metric Socket Set: 6mm – 13mm
• Knife (to cut insulation when replacing bottom heating element)
• Pliers: (Regular, Needle-nose, Side Cutter)
• Gloves (to protect hands from cuts)
• Multimeter
• Cleaning Rags

Door Removal
To remove the door (See Figure 4-1):
1. Open door fully.
2. Flip hinge retaining clips at each hinge up and back until they hit the stop knobs.
3. Move door in the closing direction until it stops against the tops of hinge retaining clips.
4. Grasp sides of door and continue to move door in the closing direction while lifting up and pulling door assembly away from unit. This will disengage hinges from the unit.

Door Handle Removal
To remove the handle (See Figures 4-2 and 4-3):
1. With door removed, lay it on a flat surface with the handle up.
NOTE: Lay protective material over flat surface to avoid damage to surface.
2. At bottom of door, extract inner most screws, one each side of door, using a T-10 bit.
3. Lift bottom of door front glass assembly up until flange at bottom is above the lower door liner flanges.
4. With door front glass assembly flange above door liner flanges, pull door glass assembly away from top of door until glass assembly upper bracket disengages from upper door liner flange.
5. Extract handle mounting screws from backside of glass assembly and pull handle and stand-offs from glass assembly.

Documents / Resources

Sub Zero CSO24 Convection Steam Oven [pdf] Instruction Manual 29, E33, E34, E35, E36, F1, F3, F3, F17, F9, F12, F12, F13, F14, CSO24 Convection Steam Oven, CSO24, Convection Steam Oven, Steam Oven, Oven

References

• User Manual