Groen CC40-G Installation Manual

OPERATOR MANUAL

VAPORS AND LIQ

UIDS IN THE VICINITY OF THIS OR ANY

OTHER APPLIANCE

POST IN A PROMINENT LOCATION

GAS. THIS INFORMATION SHALL BE OBTAINED BY

CONSULTING YOUR LOCAL GAS SUPPLIER. AS A MINIMUM,

TURN OFF THE GAS AND

CALL YOUR GAS COMPANY AND

YOUR AUTHORIZED SERVICE AGENT. EVACUATE ALL

PERSONNEL FROM THE AREA.

DAMAGE, INJURY OR DEATH. READ THE INSTALLATION,

MODEL: CC40-G
Combo SuperSystem 40™

Combination Steamer-Oven

Roll-in loading Gas heated

OM-CC40-G

THIS MANUAL MUST BE RETAINED FOR FUTURE REFERENCE

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE

INSTRUCTIONS TO BE FOLLOWED IN THE EVENT USER SMELLS

WARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTER
ATION, SERVICE OR MAINTENANCE CAN CAUSE PROPERTY

OPERATING AND MAINTENANCE INSTRUCTIONS THOROUGH
LY BEFORE INSTALLING OR SERVICING THIS EQUIPMENT.

IMPORTANT — READ FIRST — IMPORTANT

The Groen unit you have purchased has been handcrafted from the finest materials, meticulously
inspected, and pretested at our factory to ensure that you receive the best possible product. With
reasonable care and periodic maintenance, it will provide years of faithful service.

PLEASE READ THIS MANUAL CAREFULLY BEFORE INSTALLING OR OPERATING THE
EQUIPMENT ! It contains information you will need to properly install, operate, and maintain the
equipment.

It is recommended that you establish a timetable for periodic maintenance as outlined in this manual.
Space has been provided in the Service Log. Keep it up-to-date and on file with the warranty information.

Please pay special attention to the section on WATER CONDITIONING. Water quality problems are the
most common cause of steamer failure and are not covered by provisions of the product warranty.

The warranty on this unit does not extend to:

1. Installation and start-up.

2. Simple adjustments, such as tightening fittings and electrical connections.

3. Malfunction as a result of improper maintenance.

4. Repairs made by anyone other than qualified service personnel as recommended by Groen.

5. Damage caused in shipment or damage as a result of improper use.

6. Normal maintenance as outlined in the operator manual.

7. Damage as a result of excessive moisture in components. DO NOT SPRAY THIS EQUIPMENT WITH
WATER OR STEAM.

8. Damage caused by tampering with, removal of, or change of any preset control or safety device.

9. Damage caused by hitting a surface of the unit with a cooking implement or by rubbing or scraping the
surface with abrasive materials.

10. Malfunction as a result of sediment and/or lime in the valves or scale build-up in the steam
generator.

NOTE: MINIMUM water quality STANDARDS MUST BE MET to insure proper operation. WATER

SOFTENING IS RECOMMENDED if the quality of your water does not meet the following
standards. Total dissolved solids (TDS) content should not exceed 30 parts per million, and water
pH should be 7.0 or higher.

11. Labor involved in moving other equipment to gain access to the unit. The user must maintain the

accessibility of the unit for service under the warranty.

12. Damage to electronics caused by exposure to excessive heat or improper spacing of unit from other

sources of heat. A minimum of 2" (5 cm) must be maintained between right side (louvered side) and
any other equipment. A minimum of 12" (31 cm) must be maintained between the unit and any heat
source (braising pan, kettle, etc.).

13. Malfunction or damage to unit due to improper drain connection.

WARNING: USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY

GROEN OR THEIR AUTHORIZED DISTRIBUTOR CAN CAUSE INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND WILL VOID ALL
WARRANTIES.
SERVICE PERFORMED BY OTHER THAN FACTORY AUTHORIZED
PERSONNEL WILL VOID ALL WARRANTIES.

If you have any questions about warranty coverage, operating procedure, or maintenance, contact your
area Groen representative or an authorized Groen Service Agency.

Table of Contents

EQUIPMENT DESCRIPTION.........................................................2, 3, 4

WATER CONDITIONING......................................................................5

INSTALLATION........................................................................6, 7, 8, 9

INITIAL START-UP .......................................................................10, 11

OPERATION.................................. 12, 13, 14, 15, 16, 17, 18, 19, 20, 21

CLEANING & MAINTENANCE

CLEANING.....................................................22, 23, 24, 25, 26, 27

MAINTENANCE......................................................................... 28

DIAGRAMS & SCHEMATICS ............................................................ 29

TROUBLESHOOTING........................................................................ 30

TROUBLESHOOTING GUIDE............................................................ 31

REFERENCES.................................................................................. 32

SERVICE LOG .................................................................................. 33

WARRANTY...................................................................................... 34

1

Gas Combo SuperSystem 40

Transport Cart Pan Rack

Transport Cart With Pan Rack
Locked In Place For Loading Etc.

Combo SuperSystem 40 With Cart
And Rack In Loading Position

2

Equipment Description

The Groen Convection Combo™ consists of a stainless steel cooking chamber, an air heating
compartment with heat exchange tubes and dual fans, a steam generator, and a control compartment
housing electrical components.

All major components of the Convection Combo are encased in a 16 gauge stainless steel cabinet. Glass
fiber insulation, 1 to 2 inches (2 to 5 cm) thick, lines the cabinet.

The oven has a double door with two large, tempered glass windows in each door. Oven viewing lights
are mounted between the inner and outer doors. Separate hinges allow easy access to the space
between the doors for window cleaning and light fixture maintenance. A condensate collection tray at the
bottom diverts condensate to the oven drain. An optional solid door is available. The solid door does not
provide viewing lights.

All operator controls are on the front panel, with the exception of the pilot ignition switch and main gas
shutoff valve, which are located behind the sliding access door on the front side of the unit.

Standard controls permit the Convection Combo to operate in four modes:

1. As a convection oven

2. As a self-contained, pressureless steamer

3. As a combination oven-steamer

4. With or without the meat probe operating

Cooking chamber capacity:

28 Steam table pans (12 x 20 x 2-1/2"), or
20 Bake pans (18 x 26"), or
40 Gastronorm pans (1/1)

All units are supplied on stainless steel legs.
Controls and monitoring displays for cooking time, operating mode, and temperature occupy the control

panel. The upper portion of the panel has a digital time readout and touch pads for setting the time. Below
the timer section are lights to indicate the status of the unit plus touch pads that select the mode of
operation and switch on the power. A digital readout shows the chosen temperature, which is selected
with a dial. Status of the pilot burners is indicated by the lights above the pilot ignition switch, located
behind the sliding door in the front of the unit.

An insulated, gas fired steam generator is mounted next to the oven. Steam enters the cooking chamber
through two connecting tubes at the top and bottom on the right side of the cavity.

The deliming solution is poured through a port just below the front control panel of the unit. Our unique
automatic cleaning system transfers de-liming solution to the steam generator.

The air heating space, containing the heat exchanger tubes and fans, is separated from the cooking
chamber by removable left, right, top, and bottom partitions.

The compartment containing the automatic controls and other electrical components is on the right-hand
side of the unit and is entered by removing the right outside panel or by opening the hinged panel in the
front.

A drain is located in the removable bottom of the cooking chamber. Fluids drain from this removable
bottom and from the permanent floor to the stainless steel drain pipe outside the oven. This drain pipe
includes a spray condenser, which suppresses any steam escaping from the chamber. The drain
assembly includes a built in vent with overflow protection.

The roll-in loading and unloading equipment for Combo SuperSystem 40 consists of the Model CCS
"Smart Cart" and the separate Model CRS rack. When the rack is engaged with the cart, a hand crank
raises the rack for transportation and lowers the rack to position it in the oven. The cart is disengaged
from the rack and removed before the oven door is closed. Design of the system allows the rack to be
easily held in and transferred between reach-in or walk-in refrigerators and freezers, blast chillers, and
holding cabinets.

3

Natural

Gas at

L.P.

Gas at

Oven Mode 240,000 (70 kw) 240,000 (70 kw)

Steam Mode 280,000 (82 kw) 280,000 (82 kw)

Combo Mode 300,000 (88 kw) 300,000 (88 kw)

Preheat (Max) 520,000(152 kw) 520,000(152 kw)

*Manifold pressure

Equipment Description

BURNER FIRING RATES

Input Rates, BTU/hr

CC40-G

3.5" W.C. (0.9 kPa)*

10" W.C. (2.5 kPa)*

4

Water Conditioning

It is desirable to supply the steamer with water that will not form scale. Scale formation depends on the
hardness of the water and the hours of operation. In a few areas of the United States, the water supply is
sufficiently free of minerals to avoid scale formation. However, most water supplies carry heavy loads of
minerals, which will form scale and possibly cause premature failure of components.

Your local water utility can provide a statement on the scale forming qualities of the water supply. Water
supplied to the boiler should contain not more than 30 parts per million total dissolved solids (TDS) and
should have a pH of 7.0 or higher.

Please follow these simple precautions:

1. Do not rely on "water treaters" commonly sold as scale preventers and scale removers. They do not

work. The only proven way to prevent scale build-up is to feed in water practically free of scale­forming minerals.

2. If your water supply carries scale-forming minerals, as most water supplies do, run the water through

a properly maintained softener. Exchangeable softener cartridges or a regeneratable softener can be
used. In either case, establish a regular program of exchanging the cartridges or regenerating the
softener. Installing a water meter on the inlet line between the softener and the steamer will give an
accurate check of water consumption and a way of determining when to change the cartridge or
regenerate the softener. By using a softener and operating within the softener's capacity to
exchange minerals, the user will optimize performance and minimize maintenance of the steamer.

3. If you notice a slowing of steam production, have your authorized Groen service representative

check the unit for build-up of scale. Heavy scale will reduce the unit's ability to boil water and can
cause a fire tube in the steam generator to overheat and burn out.

TO MINIMIZE SCALE PROBLEMS, USE AND PROPERLY MAINTAIN A SOFTENER, AND CLEAN THE
STEAMER PERIODICALLY OR AS NEEDED.

5

Installation

cm) of any

cm) of a heat source, like a

A. Mounting

When the combination oven is received, immediately inspect the unit thoroughly for external and internal
damage. Report any damage to the carrier.

WARNING:

To avoid drainage problems, level the unit front-to-rear, or provide a slight pitch to the rear. Maintain a
minimum 8-1/2 inch (22 cm) clearance between the cabinet and the floor (Figure 2), to permit proper
operation of the cart.

WARNING: THE UNIT MUST BE INSTALLED BY

The CC40-G combination oven is suitable for installation in
combustible and noncombustible locations. The flooring in
all installations must be of a noncombustible material. The
minimum clearances for Installations are:

CAUTION: The CC40-G combination oven
The unit must be installed in an adequately ventilated room with a provision for adequate air supply to the

unit. The unit must be completely installed under a ventilation hood, since flue products exit the appliance
over its entire depth. All items which may obstruct or restrict the flow of air for combustion and ventilation
must be removed. Do not obstruct the flue cover or any front, side, rear, or top vents after installation. The
area directly around the appliance must be cleared of all combustible material. The installation must
conform with local codes, or, in the absence of local codes, with the National Fuel Gas Code, ANSI
Z223.1-latest edition, including:
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of 1/2 psig (3.45 kPa). The
appliance must be isolated from the gas supply piping system by closing its individual manual shutoff
valve during any pressure testing of the gas supply piping system at test pressures equal to or less than
1/2 psig (3.45 kPa).

Do not install a unit in these locations:

• Where the right side vents are blocked or within 2 inches (5
combustible material or within 12 inches (31
braising pan, deep fryer, char broiler, or kettle.

• To the left of any open-flame equipment.

• With less than 7 inches (18 cm) of clearance at the rear.

PERSONNEL QUALIFIED TO WORK
WITH ELECTRICITY AND PLUMBING.
IMPROPER INSTALLATION CAN
CAUSE INJURY TO PERSONNEL
AND/OR DAMAGE TO THE
EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH
ALL APPLICABLE CODES.

Right side 2 inches (5 cm)
Left side 0 inches (0 cm)
Rear 7 inches (18 cm) Figure 2

requires 24 inches (61 cm) clearance on the right side for proper service.

6

B. Gas Supply Connection

GAS

TREATED UNTREATED

ELECTRICAL

3" (76

mm) DRAIN

NOTICE: Making any electrical or mechanical change in the unit without prior approval from the Groen

Food Service Engineering Department may void all warranties.
Connection to the gas supply can be completed with 1" (2.5 cm) NPT pipe or approved equivalent.
Although the immediate connection to the appliance is 1" (2.5 cm) NPT, gas supply piping must be large
enough to provide 520,000 BTU/hr (152 kw) for each CC40-G. Supply pressure, measured at the back of
the oven, must be at least 6.5" W.C. [1.6 kPa] (maximum 14" W.C. [3.5 kPa]) for natural gas or at least
12" W.C. [3 kPa] (maximum 14" W.C. [3.5 kPa]) for LP gas. In Canada, the installation must conform to
the Canadian Gas Code, CAN 1-B149, Installation Codes for Gas Burning Appliances and Equipment,
and/or local codes.
After the unit has been connected to the gas supply, all gas joints must be checked for leaks. No flame
should be used when checking for leaks. A thick soap solution or other suitable leak detector should be
used.

C. Electrical Supply Connection

For the oven provide 115 VAC, 60 HZ, 1 PH, 15 AMP service. Local codes and/or the National Electrical
Code should be observed in accordance with ANSI/ NFPA 70-1987 (or latest edition). AN ELECTRICAL
GROUND IS REQUIRED. The electrical schematic is located in the service compartment and in this
manual. Maximum load per oven is 11 amps. In Canada, provide electrical service in accordance with the
Canadian Electrical Code, CSA C22.1 Part 1, and/or local codes.

Convection Combo Utility Connections

NOTE: Remove right side panel and make electrical connection at terminal block in rear of control

compartment.

CONNECTION

1"(25mm)

COLD WATER
CONNECTION

CONNECTION

Figure 3

7

CONNECTION

Installation (cont'd)

D. Water Supply Connection

Two water connections are provided. One supplies water to the steam generator (treated water), and the other is for
the condensate spray (untreated water). A back siphonage device (check valve) must be installed in each incoming
cold water line according to local plumbing code. The water line pressure should be between 30 and 60 PSIG (210
and 410 kPa). A pressure regulator is required above 60 PSIG (410 kPa). Two 3/4 inch NH (garden hose type)
connectors are required to connect the water supply to the water inlet valves. The minimum diameter of each water
feed line is 1/2 inch (13 mm). Use a washer (or, if necessary, two washers) in the hose connection. Do not allow the
connection to have any leak, regardless of how small.

E. Drain Connection

A hose may be attached to the outlet of the drain by means of a clamp. Use 3" (7.6 cm) ID hose for CC40-G.
The hose may be connected directly to an atmospherically vented building drain.

The drain has a 2 inch (5 cm) air vent, which eliminates the need for a free air gap at the connection to the
building drain, unless such a gap (Figure 4) is required by local code. Do not block the air vent in any way. Do
not attach anything to the vent tube or reduce the size of the vent tube.
Do NOT use plastic pipe in the drain line, because the drain must withstand boiling water. Install the drain

line with a constant downward pitch. Do NOT create any water trap (Figure 5) in the line.

8

Proper Drain Line Connection

Figure 4

Improper Drain Line Connection

BUILDING

DRAIN

Figure 5

9

Initial Start-Up

After the Convection Combo has been installed, perform initial testing to ensure that the unit is operating
correctly.

1. Remove all literature and packing materials from the interior and exterior of the unit.

2. Make sure both cold water supply lines are open and none of the fittings are leaking.

3. Make sure that the gas supply line is open. Turn the knob of the main gas shutoff valve (Figure 6) so it

is lined up with the pipe.

4. Turn on electrical service to the unit. Because the unit will not operate without electrical power, no

attempt should be made to operate the unit during a power failure.

5. The front control panel will not operate until the pilot burners have been ignited. To light the pilot

burners, activate the pilot switch located next to the main gas valve. When the pilot ignition sequence
has been successfully completed, the red lights will glow, and power will then be supplied to the front
control panel.

6. The "trial for ignition" period is roughly 90 seconds. If the pilot burners do not ignite within about 90

seconds after the pilot switch is activated, then the ignition system automatically stops gas flow to the
pilot burner and terminates the ignition trial. If the ignition trial is terminated, turn off the pilot switch
and repeat the trial for ignition. During the initial start-up, the pilots may require several trials for
ignition to bleed air from the gas piping. Subsequent start-ups should require only about 5 seconds to
achieve pilot ignition.

NOTE: See Automatic Operation of Pilot at the end of this section.

7. Once the pilot burner flames have been established (both red lights on top of the pilot switch are on),

subsequent operator commands are executed via the front control panel touch pads. See the
Operation section for details.

8. High altitude operation. The altitude of operation can be programmed into the Convection Combo.

At altitudes above 2,000 feet (610 m), the unit will not operate in Steamer or Combo Mode unless the
altitude is set. This setting should agree with the nameplate. To set the altitude:

a. If the unit is on, turn it off by pressing the ON touch pad.

b. Press and hold the STEAM touch pad while turning the unit on by pressing the ON touch pad. The

timer display will show the letters AL and a number that represents the altitude in thousands of feet.
If the altitude has never been set on your unit, the number displayed will be 1.

c. Enter the proper altitude value, between 1 and 15, using the numbered touch pads. For example, if

the unit will be used at an altitude of 7,000 feet (2100 m), press the 7 touch pad.

d. Press the START touch pad.

9. To test Steamer Mode operation, turn on the unit. (For details of operating procedure, see the

Operation section of this manual.) Clear any time from the time display, close the door, and press the
STEAM touch pad. (If the HOT light is on, see the Fast Cool instructions in the Operation section.)
The WAIT light will stay on while the oven burners preheat the cooking chamber and the steam
generator fills with water and heats the water. Within 15 minutes the WAIT light should go off and the
READY light should come on, indicating that the water has reached the standby temperature. The
timer controls operation (in Steamer Mode only), so enter a time, then push START. The colon on the
time display will blink, and the generator will begin to produce steam. The timer will not count down, if
the READY light is not lit.

WARNING: STEAM CAN CAUSE BURNS. AVOID ESCAPING STEAM WHEN OPENING DOOR.

NOTE: You cannot change modes if the timer is running.

10

VALVE

PILOT

10. To test Combo Mode operation, turn the power on and clear any time from the timer display, Press
the COMBO touch pad. Set the COOK temperature to 300°F (150°C). The WAIT light will come on and
stay on, while (1) the steam generator fills with water and heats the water to standby temperature and
(2) the oven burners raise air temperature to 300*F (150°C ). Both actions should be completed in
about 15 minutes, starting with a cold unit. Then the WAIT light will go off and the READY light will
come on.

WARNING: STEAM CAN CAUSE BURNS. AVOID ESCAPING STEAM WHEN OPENING

DOOR.

NOTICE: The timer does not control the oven in Combo Mode or Oven Mode.

11. To test Oven Mode operation, turn the power on and clear any time from the timer display. Press the
OVEN touch pad. Set the COOK temperature to 350°F (175°C). The WAIT light will come on. Within
10 minutes from a cold start, the WAIT light should go off and the READY light should come on. When
that happens, turn the COOK temperature setting down to 300°F (150°C). The HOT light will come on.

12. To test Meat Probe operation, turn the PROBE knob clockwise to activate the probe. Confirm that
the temperature shown in the TIME display is the actual temperature of the probe. Then turn the
PROBE knob counterclockwise to inactivate the probe.

13. The heat-up times stated above may vary slightly due to differences in gas and water pressures.

14. To shut down the unit, first clear the timer. Then press the mode touch pad for the mode the unit is in.
Switch off the power. The pilot burner may also be switched off to conserve energy.

15. If the Convection Combo behaves as described, the unit is functioning correctly and ready for use.

Automatic Operation of Pilot

Once either pilot burner has been ignited, it essentially functions as a standing pilot. When the pilot switch
is on, if the pilot is accidentally extinguished (by a very strong gust of wind or the like), then it will be re­ignited automatically. The unit will shut off completely for a few seconds while the pilot is re-ignited, then
the unit will come back on and resume operation in the mode and (running) timer value existing just prior
to shutdown. The pilot switch may be turned off during "off hours" to conserve energy.

After the unit has been running, if the pilot burner ever fails to re-ignite automatically within 90 seconds,
then wait 5 minutes before you attempt to reactivate the pilot switch. In the unlikely event that ignition
problems persist, contact your authorized Groen Service Agency.

KNOB

SWITCH

Figure 6

11

Figure 7

12

NOTICE: All potential users of the equipment should be trained

in safe and correct operating procedure.

CAUTION: DO NOT OPERATE THE UNIT IN ANY MODE,

UNLESS ALL EIGHT REMOVABLE INTERIOR
PARTITIONS HAVE BEEN RETURNED TO THEIR
PROPER LOCATIONS.

NOTICE: Before the control panel can be operated as

described in this Operation section, the pilot burner
flame must be established. See the Initial Start-Up
section for details.

A. Controls and Indicators

The control features routinely used by the operator are on
the right front side of the unit and are described as follows.
(Refer to Figure 7).

1. Time Section

In the Oven and Combo Modes of operation, the timer
functions only as a "cooking time minute minder" and
does not turn the unit on or off. In the Steamer Mode,
the timer controls the operation of the steaming function.

a. Display Window — Displays the operating time

remaining in the Steamer, Oven, or Combo Mode,
because the timer counts down. Format of the
display is "hours : minutes". Maximum minute
display accepted by the unit is 59. Any recipe
calling for more than 59 minutes should be
converted to hours and minutes format, e.g., 90
minutes is equal to 1 hour and 30 minutes. Display

will read 01:30.
b. Time touch pads — used to enter time values.
c. CLEAR — Pressing this touch pad once stops the

beeper and resets the timer to the timer that was

last set. Pressing twice clears the timer to 00:00.

(At the end of a cooking period, opening the door

has the same effect as pressing CLEAR once.)
d. START — Pressing this touch pad will start the

timer and, if the unit is in Steamer Mode, also

cause steaming to begin.

2. Status Lights
a. HOT— Indicates the chamber temperature is more

than 15°F (8°C) above the cook temperature
setting (see item 5 in this section).

13

Operation (cont'd)

b. SERVICE — Indicates a problem that may

require a service call. If such a problem has
occurred, the beeper will sound and the
SERVICE light will be on, when power is
switched on. The unit may continue to
operate, depending on the type of problem.
Refer to the Troubleshooting section to
determine the nature of the problem.

c. WAIT— Indicates the unit is either

heating or cooling toward the set
temperature. The HOT and WAIT
lights will be on together, if the
chamber is more than 15°F (8°C)
above the set point.

d. READY— Indicates the unit is ready

for use.

3. Cooking Mode Selection
These touch pads are used to select the

mode of operation. If a mode is off,
pressing the pad for that mode will switch
the mode on. If the mode is on, pressing its
pad will switch the mode off. A light just
above each pad shows which mode has
been selected

a. STEAM — Selects steamer operation. .
b. COMBO—Selects combined steam and

convection oven operation.

c. OVEN — Selects operation of the

convection oven only.

4. Power

This touch pad is used to switch the unit on
or off. When power is on, the ON light just
above the pad is lit Use of this pad does
not reset the controls, so the unit will come
on in the same mode it was in when it was
last switched off.

5. TEMP Section

a. The window displays the selected

temperature in either Oven or Combo
Mode. It is blank in the Steamer Mode.

b. Turning the knob selects the cooking

temperature in 5°F or 5°C increments. The
control ranges are:

Oven Mode 200 to 500*F (93 to 260°C)

Combo Mode 220 to 500*F (105 to 260°C)

6. Meat Probe Selection
This rotating knob is used to turn on or off the hold function. By selecting a certain temperature

(ranging between 80*F [27°C] and 200*F [93°C]) the food can be maintained at a constant
temperature for a fixed amount of time.

7. Door Lights Selection
Door lights can be turned on/off to view the food inside by using this touch pad. These lights are

not available with the optional solid door.
14

B. Operating Instructions

1. Steamer Mode

a. If the unit is off, switch on the electric power by

pushing the ON touch pad. (If the SERVICE
indicator lights when power is switched on, see the
Troubleshooting section.)

b. If power is already on and any number is showing

in the time display window, press the CLEAR touch
pad one or more times to reset the time display to
zero.

NOTICE: You cannot change mode while the timer is
running

c. The unit will be in the mode of operation that was

used last, so the indicator for that mode will be lit. If
the unit is not already in Steamer Mode, press the
STEAM touch pad. The STEAM indicator will light,
and the TEMP window will go blank.

d. If the unit has just been used in Oven or Combo

Mode, lighting of the HOT indicator may show that
the cooking chamber is too hot for use as a
steamer. The unit can be cooled quickly to the
proper temperature range for steaming by leaving
the door open or by following the Fast Cool
procedure described near the end of this section.

WARNING: STEAM CAN CAUSE BURNS.

AVOID ESCAPING STEAM
WHEN OPENING DOOR.

While the door is open, the generator can fill and
heat water to 200°F (93°C), but it cannot produce
steam.

e. The WAIT indicator will be lit until the water reaches

approximately 200°F (93°C). Then the WAIT light
will go off and the READY indicator will light. You
are now ready to steam foods in your Convection
Combo.

f. Load the food into the pan or pans so there is a

uniform layer.

g. Make sure the hooks on the rack are fully

engaged in the slots of the cart while raising the
rack. The pan stop should be in the center position
when moving the cart with the rack engaged.

NOTICE: Use the brakes on the rear wheels to hold
the cart in steady position.

h. Place the pans in the rack, which is on the cart. If

there are only few pans, uniformly distribute them
in the center of the rack.

i. Press the numbered touch pads to set the cooking

time. The time set will appear in the time display
window. If you enter the wrong number, press the
CLEAR pad to erase the time from the display,
then set the time again.

j. Carefully open the door, then move the cart so the

rack goes into the oven cavity. Using the hand
crank, lower the rack to the floor of the cavity.
Remove the cart and close the door.

15

Operation (cont'd)

k. When the correct cooking time has been entered,

press the START pad. The colon will blink, and the
timer will count down the cooking time. (The unit must
be READY before the timer can count down.)

I. Opening the door during the cooking period stops the

production of steam and interrupts (but does not reset) the
timer. Closing the door allows steaming and timing to continue.

WARNING: STEAM CAN CAUSE BURNS. AVOID ESCAPING STEAM
WHEN OPENING DOOR.

m. When the timer has counted down to zero, it will stop the

generation of steam and sound a beeper alarm. Water in the
steam generator will be held at the standby temperature (about
200°F or 93°C). The beeper will continue until the door is
opened or the CLEAR pad is pressed.

n. Carefully open the door. If the food is cooked, engage the cart

with the rack. Make sure the hooks on the rack are fully
engaged in the slots of the cart. Then crank the rack up, and
remove the rack from the oven.

o. After the timer display has counted down to zero, opening the

door or pressing CLEAR once will reset the display to the time
that was used last. Pressing START will repeat the cook cycle.
If the same cooking time will be used repeatedly, you need to
press the number keys only when you first use that time.

p. After the timer display has counted down to zero the timer can

be reset to zero by either (1) opening the door and pressing
CLEAR or (2) pressing CLEAR twice. A new cooking time
must be set by using the number keys.

2. Oven Mode
a. To use the Convection Combo as a convection oven,

first switch on the electric power by pushing the ON
touch pad. (If the SERVICE indicator lights when the
power is switched on, see the Troubleshooting
section.) The fans will begin to operate, if the door is
closed and the cooking chamber temperature is
above 200°F (93°C).

b. If power is already on and any number is showing in

the time display window, press the CLEAR touch pad
to erase the time display.

NOTICE: You cannot change mode while the timer is running.

c. The unit will be in the mode of operation that was

used last, so the indicator for that mode will light. If
the unit is not already in Oven Mode, press the OVEN
touch pad. The OVEN indicator will light, and the oven
fans will operate.

16

d. Using the dial in the TEMP section of the control

panel, set the desired cooking temperature, which
will appear in the temperature display window
beside the dial. Unless the cooking chamber is
already at or above the set temperature, the unit
will begin heating the chamber, and the WAIT
indicator will light.

e. If the unit has just been used at a temperature

more than 15°F (8°C) higher than the desired
temperature, the HOT and WAIT indicators will
light. The unit can be cooled quickly to the correct
temperature by leaving the door open or by
following the Fast Cool procedure near the end of
this section.

f. The READY light will indicate when the oven is at

the desired temperature.

g. Make sure the hooks on the rack are fully

engaged in the slots of the cart while raising the
rack. The pan stop should be in the center position
when moving the cart with the rack engaged.

NOTICE: Use the brakes on the rear wheels to hold the

cart in steady position.

h. Load the food into the pan or pans so there is a

uniform layer.

i. Place the pans in the rack. which is on the cart. If

there are only few pans, uniformly distribute them
in the center of the rack.

j. The Convection Combo will operate in Oven Mode

with the timer either on or off. If you wish to time
the cooking, press the numbered pads at the TIME
portion of the control panel to set the cooking time.
The time set will appear in the time display
window. If you enter the wrong number, press the
CLEAR touch pad twice to erase the time from the
display, then set the time again. Remember that
the timer does not control the unit in Oven Mode.

WARNING: HOT AIR CAN CAUSE BURNS.
AVOID ESCAPING HOT AIR
WHEN OPENING DOOR.

k. Carefully open the cooking chamber door. Push the

cart so the rack goes into the oven cavity. Using
the hand crank, lower the rack to the floor of the
cavity. Remove the cart and close the door.

I. If cooking time has been set on the timer,

immediately press the START touch pad. Timing
will begin, and the time shown in the display will
decrease. When the timer has counted down to
zero, it will sound a beeper. The beeper will sound
until door is opened or the CLEAR touch pad is
pressed.

m. To stop cooking, engage the cart with the rack.

Make sure the hooks on the rack are fully engaged
in the slots of the cart. Then crank the rack up, and
remove the rack from the oven. The unit will
continue heating to keep the cooking chamber at
the set temperature, until the temperature controls
are reset or power is shut off.

17

Operation (cont'd)

n. Opening the door during operation shuts off power

to the oven burners and fans and stops the timer,
but it has no other effect on the controls. When the
door is closed, operation continues as before. Note
that leaving the door open will extend the cooking
time.

3. Combo Mode
a. If the unit has been turned off, switch on the

electric power by pushing the ON touch pad. (If the
SERVICE indicator lights when power is switched
on, see the Troubleshooting section.) The fans
will begin to operate, if the door is closed and the
cooking chamber temperature is above 200°F
(93°C).

b. If power is already on and any number is

showing in the time display window, press the
CLEAR touch pad to erase the time display.

NOTICE: You cannot change mode while the
timer is running.

c. The unit will be in the mode of operation that was

used last, so the indicator for that mode will be lit.
If the unit is not already in Combo Mode, press
the COMBO touch pad. The COMBO indicator
will light. If the steam generator is not already full
of water, water will flow into it and be heated.

d. Set the desired oven temperature (between 220

and 500°F or 105 and 260°C) with the dial in the
TEMP section of the control panel. The set
temperature will be shown in the temperature
display window beside the dial.

e. If the unit has just been used in Oven or Combo

Mode, the HOT indicator may light, showing that
the cooking chamber is too hot for use at the set
temperature. The chamber may be cooled
quickly by leaving the door open or by following
the Fast Cool procedure near the end of this
section.

WARNING: STEAM CAN CAUSE BURNS.

AVOID ESCAPING STEAM WHEN OPENING
DOOR.

While the door is open, the fans and oven
burners will not operate, but water in the steam
generator will be kept ready for steam
production.

f. The WAIT indicator will be lit until the water in

the steam generator reaches the boiling point
and the air in the cooking chamber reaches the
set temperature. Then the WAIT light will go off
and the READY light will come on, indicating that
the oven is at the desired temperature.

18

g. Make sure the hooks on the rack are fully

engaged in the slots of the cart while raising the
rack. The pan stop should be in the center position
when moving the cart with the rack engaged.

NOTICE: Use the brakes on the rear wheels to hold

the cart in steady position.

h. Load the food into the pan or pans so there is a

uniform layer.

i. Place the pans in the rack, which is on the cart. If

there are only few pans, uniformly distribute
them in the center of the rack.

WARNING: STEAM CAN CAUSE BURNS.

AVOID ESCAPING STEAM WHEN
OPENING DOOR.

j. The unit will operate in Combo Mode with the

timer either on or off. If you wish to time the
cooking, press the numbered pads in the TIME
portion of the control panel to set the cooking
time. The set time will appear in the time display
window. If you enter the wrong number, press
the CLEAR touch pad twice to erase the time
from the display, then set the time again.

k. Carefully open the door, then move the cart so

the rack goes into the oven cavity. Using the
hand crank, lower the rack to the floor of the
cavity. Remove the cart and close the door.

I. If the timer has been set, immediately press the

START touch pad. The time shown in the display
will decrease. When the timer has counted down
to zero, it will switch on the beeper. The beeper
will sound until the door is opened or the CLEAR
pad is pressed. Remember that the timer does
not control or shut off the unit in Combo Mode.

m. To stop cooking, engage the cart with the rack.

Make sure the hooks on the rack are fully engaged
in the slots on the cart. Then crank the rack up,
and remove the rack from the oven. The unit will
continue steaming and heating the oven, until the
temperature controls are reset or power is shut off.

4. Fast Cool
a. When the HOT indicator is lit and the timer has

been cleared, the unit can be cooled quickly by
opening the door and pressing the START touch
pad. The fans will operate, and the TIME window
will display the word "COOL". This is the only time
the fans will operate with the door open.

WARNING: DO NOT PUT HANDS OR OTHER OBJECTS

INTO THE COOKING CHAMBER DURING
FAST COOL OPERATION. ROTATING
FANS CAN BE HAZARDOUS AND RESULT
IN SERIOUS INJURY AND DEATH.

19

b. Pressing any touch pad or closing the door will

stop the Fast Cool operation.

5. Shutting Down

To shut down the Convection Combo unit, first press the
mode touch pad for the mode in which the unit is
operating. Then switch off the power by pressing the ON
touch pad. The pilot switch may also be turned off to
conserve energy. Leave the door at least slightly open,
if local sanitation regulations permit.

6. Meat Probe
The meat probe function holds meat at a constant

temperature after the meat has been cooked. This
function can be turned on or off by rotating the PROBE
knob (Figure 8).

a. Set the controls for Oven or Combo Mode

operation and set the COOK temperature.

b. Insert the probe to an appropriate position in the

meat.

c. Using the PROBE knob, set the desired final internal

meat temperature within a range of 80°F (27° C) to
200° F (93° C). This set point temperature can be
seen in the PROBE display. The TEMP display
shows the cooking temperature set for the oven.

d. The actual temperature of the probe is shown in the

TIME display at the top of the panel. The display will
remain in this state until the probe temperature
reaches the set point. Then the beeper will sound,
heat to the steam generator will shut off, and oven
operation will regulate the air temperature at the
probe set point.

e. The meat temperature will now be displayed in the

TIME window and will blink.

f. After 1 minute of beeping or if CLEAR is pressed or if

the door is opened, the TEMP display will begin
counting up in hours:minutes to indicate how long the
food has been at the set point.

NOTE: The meat probe will not operate in the Steam

Mode.
The meat probe cannot be selected if the timer is
running or paused.

7. Door Lights
a. The door lights can be turned on by pressing the

Light touch pad.

b. Once turned on, the lights will be on for 30

seconds or until the touch pad is pressed again to
turn the lights off.

These lights are not available with the optional solid
door.

20

21

Figure 8

Cleaning & Maintenance

2.

3.

7. Spray bottle

THE LABEL OF EACH CLEANING AGENT.

DO NOT PUT HANDS OR TOOLS INTO THE COOKING CHAMBER UNTIL

NOTICE:

Do not use a cleaning or de

-

liming agent that contains sulfamic acid or any

including hydro

chloric acid (HCI). To check for content of these substances, refer

CLEANING INSTRUCTIONS

Cleaning should be done regularly to keep the Convection Combo in proper operating condition and to
make the cleaning process faster.

A. Recommended Cleaners and Tools

1. Mild detergent
Stainless steel cleaner, for example, Zepper from Zep Manufacturing Co.
Steam generator de-liming agent, like Groen delimer/descaler P/N 114800 or Lime-A-Way from
Ecolab (1-800/352-5326). De-liming agent should contain phosphoric acid, not to exceed 30%

total volume. See notice about sulfamic acid and chlorides below.

4. Oven degreaser, like Groen spray degreaser P/N 114801, Easy-Off non-caustic, Encompass,
Malone 34, Oven Cleaner 200, or Con-Lie

5. Cloth or sponge

6. Plastic wool or brush with soft bristles

8. Measuring cup

9. Nylon, scrub pad

10. Towels

11. Plastic disposable gloves

B. Precautions

WARNING: TO AVOID BODILY INJURY, BEFORE CLEANING THE OUTSIDE OF THE

STEAMER, OR REMOVING ANY PARTITION OR PANEL, DISCONNECT
THE ELECTRIC POWER SUPPLY. KEEP WATER AND CLEANING
SOLUTIONS OUT OF CONTROLS AND ELECTRICAL COMPONENTS.
NEVER HOSE OR STEAM CLEAN ANY PART OF THE UNIT.

ALLOW COOKING CHAMBER TO COOL BEFORE CLEANING.
CAREFULLY READ THE WARNINGS AND FOLLOW THE DIRECTIONS ON

DO NOT MIX DE-LIMING AGENT (ACID) AND DEGREASER (ALKALI) IN
THE STEAM GENERATOR OR ON THE COOKING CHAMBER WALLS.

THE FANS HAS STOPPED TURNING.
DO NOT OPERATE THE UNIT UNLESS THE REMOVABLE RIGHT SIDE

PANEL HAS BEEN RETURNED TO ITS PROPER LOCATION.

"Material Safety Data" sheet provided by the cleaning agent manufacturer.
NOTICE: Use no degreaser that contains potassium hydroxide or sodium hydroxide or that

highly alkaline.

22

C. Cleaning Outside

1. Prepare a warm solution of the detergent as instructed by the supplier. Wet a cloth with this
solution and wring it out. Use the moist cloth to clean the controls, control panel, and other
electrical parts that must not have liquid running freely on them.

WARNING: BE CAREFUL IN CLEANING THE TOP FLUE COVER AND THE TOP OF THE
OVEN, THESE AREAS MAY BE VERY HOT.

2. To remove materials stuck to the unit, use plastic wool, a soft-bristle brush, or a plastic or
rubber scraper with detergent solution. Do not use any metal material (like a metal sponge)
or metal implement (like a spoon, scraper, or wire brush) that might scratch the surface.
Scratches make the surface hard to clean and provide places for bacteria to grow. Do not
use steel wool, which may leave particles imbedded in the surface and cause eventual
corrosion and pitting.

3. Stainless steel surfaces on the outside of the unit may be polished with a recognized
stainless steel cleaner.

D. Cleaning Inside

To automatically clean the cooking chamber and/or de-lime the steam generator, a special sequence of
operations (the Clean Cycle) has been programmed into the Convection Combo computer. To run this
automatic Clean Cycle for cooking chamber cleaning, steam generator de-liming, or both actions at the

same time, follow the instructions as outlined in the table below:

Degrease Cooking
Chamber Only

Omit Step 2 Omit Step 1 Perform all steps

Following the oven cleaner supplier's instructions, you must bring the oven to a temperature of 200°F
(93°C) or less. Do not begin degreasing or de-liming while the oven is above 200°F (93°C).

Close the door, put the unit into Oven Mode, and select 200°F (93°C). If the HOT light is on, use the Fast
Cool Mode to cool the oven until the HOT light goes off. If the HOT light does not come on, immediately
open the door to shut off the oven burners. Once the HOT light is off, you can proceed safely.

When the oven has reached the desired temperature, take the unit out of Oven Mode by clearing the timer
and pressing the OVEN touch pad. Enter "99" (00:99) into the timer. The timer window will display "CC" or
"CL".

WARNING: DO NOT REACH INTO THE OVEN DURING FAST COOL. BEFORE

YOU REACH INTO THE OVEN TO REMOVE PARTITIONS, EXIT THE FAST COOL
MODE BY PRESSING ANY BUTTON OR BY CLOSING AND REOPENING THE
DOOR. ALLOW THE FANS TO STOP BEFORE CONTINUING. FAILURE TO DO SO
CAN RESULT IN SERIOUS INJURY OR DEATH.

Step1. Degreasing

During most Clean Cycles, adequate cleaning can be done by just removing the top and bottom
partitions and swinging open the side partitions to apply the oven cleaner. Remove all
partitions only when more complete cleaning is necessary.

Open the door, wait until the fans stop moving, and then remove the oven rack and the top and
bottom partitions. Use a glove if the oven is hot. Left and right side partitions do not need to be
removed for cleaning; they can just be swung open. To remove the partitions (even if the left and
right side partitions have to be removed), follow in reverse order the installation procedure
described below.

De-Lime Steam
Generator Only

Degrease Chamber and
De-Lime Generator

23

Cleaning & Maintenance (cont'd)

CAUTION: Do not operate the unit in any mode unless all eight removable partitions

have been returned to their proper locations.

Make sure to clean all food particles out of the drain. Following the oven cleaner supplier's
instructions, apply cleaner to the oven walls and heat exchange tubes and to the rear face of
each of the eight removable partitions. Return the eight partitions to their proper locations in the
following order.

Top: The top partition is flat and has no holes. Install it by pushing up, then pushing from

right to left to rest it on the solid bars at the top of the cavity.

Bottom: The bottom partition has a small circular pattern of drain holes. Lay the panel flat and

push all the way to the rear by holding the latch in the vertical position. Drop the latch
down once the partition is in place (Figure 9).

Right: The right side partitions include a large, circular, flared opening that must be

centered in front of the fans. Line up the upper hole on the upper partition with the
upper pin and lift the partition all the way up. Now line up the bottom hole with the
bottom pin and release the partition. Swing the partition into place with the latch
handle in the open position, then close the latch (Figure 10). Similar procedure is
followed to place the right side lower fans partition.

Left: The left side inner partitions are solid plates, while the outer partitions have louvers in

them. Line up the top pin on the plate with the top hinge hole in the cavity, and
release it so that the bottom pin lines up with the bottom hinge hole. Similar
procedure is followed for the other inner and outer partitions on the left side. Latching
can be done by swinging the partitions into place with the latch handle moved to the
open position. Close the outer partitions and push the latch handle behind the pin
(Figure 9).

Apply oven cleaner to the interior faces of the eight partitions and to the inner door panel. If you
wish, you may also apply oven cleaner to the rack and return the rack to the oven.

The drip pan in the cart must be cleaned along with the cart and the rack.

24

Figure 9

Figure 10

25

Cleaning & Maintenance (cont'd)

Step 2. De-Liming

Hardness of the water affects how well the de-limer works. If the water is very hard, stronger
solutions of the de-limer may be needed, and de-liming may need to be done more often. Use a
properly maintained water softener. (Refer to the Water Conditioning section of this manual.)
Following the directions of the supplier, pour de-limer into the de-liming port located under the
control panel on the front of the unit. The capacity of the steam generator is 12 gal (45 L). If you
are using Lime-A-Way, pour in 2 3/4 quarts (2.6 L).

NOTICE: Do not use more than the recommended amount of de-liming agent. Overflow of

excess agent could damage the unit.

Pour 1 cup of liquid de-limer directly into the cooking chamber drain.

WARNING: IF THERE IS OVEN CLEANER ON OR NEAR THE OVEN FLOOR

DRAIN, POUR ONLY A SMALL AMOUNT OF DE-LIMER AT FIRST, TO
MAKE SURE THERE IS NO RAPID REACTION BETWEEN THE OVEN
CLEANER AND DE-LIMER. DO NOT BREATHE ANY RESULTING FUMES.

Step 3. Degreasing and/or De-Liming

Close the oven door and press START. The display will now read "CL:45", and the colon will
blink once each second. The unit will now begin an automatic sequence that involves heating,
draining, and refilling the steam generator at various time intervals. The display will count down
each minute.

NOTICE: To exit the Clean Cycle at any time, press and hold the CLEAR touch pad for 3

seconds.
After you exit the Clean Cycle, and before you cook any food in the unit, be sure to
wash out all chemical residues thoroughly by filling and draining the steam generator.
To fill the generator, enter Steam Mode and wait about 4-5 minutes. To drain the
generator, take the unit out of all modes, or turn the unit off; then wait 10 minutes. It
is strongly recommended that the unit be run 10 minutes in Steam Mode prior to use.
Also, wipe chemical residues from the cooking chamber interior with a wet, clean
cloth before you cook in the unit. Rinse the cloth often. This cleaning includes both
sides of each of the eight removable partitions, the rack, and the tubes and walls
behind the partitions. The partitions can be rinsed in a sink.

When the Clean Cycle is complete, the display will read "00:00".

WARNING: THE OVEN MAY BE HOT ENOUGH TO BURN YOU. DO NOT TOUCH ANY

HOT SURFACE.

Before you use the unit for cooking, wipe the whole interior with a clean, wet cloth. Rinse the
cloth often. This cleaning includes both sides of each of the eight removable partitions, the rack,

and the tubes and walls behind the partitions. The partitions can be rinsed in a sink.

CAUTION: Do not operate the unit in any mode unless all eight removable interior

partitions have been returned to their proper locations.

If the unit will not be used right away, leave the door open long enough to let the chamber dry
completely.

26

Cleaning & Maintenance (cont'd)

E. Errors During Cleaning

If the timer stops, the beeper sounds continuously, and the SERVICE light stays on, there has been an
error that prevents the unit from completing the Clean Cycle. There are two types of error:

1. Non-critical error. It is signaled by three quick beeps with the SERVICE light going out after 30
seconds. The timer does not stop.

If the Service Code displayed is 1 or 2, but not both, the unit may need more cleaning.

2. Critical error. It is signaled by a continuous 5 second beep with the SERVICE light staying on. the
timer stops. Take the following steps.

a) Perform a reset. With the unit turned off, press and hold the COMBO touch pad. Then press

the ON touch pad.

b) If the Service Codes displayed are 1 and 3 or 2 and 3 or 8, press CLEAR, and restart the

Clean Cycle by entering "99" (00:99) on the timer. Refill the CLEAN tank with de-liming agent.
Then continue the Clean Cycle by pressing START.

c) If the Service Codes displayed are 1 and 2 or 6, call your authorized Groen Service Agency for

immediate service.

If there are other errors, see the Troubleshooting section.

F. Clean Cycle Counter

The unit totalizes the number of complete clean cycles. To see this total, first turn off the unit. Press and
hold the 0 touch pad while you turn the unit on. The total will be displayed in the timer window. The Clean
Cycle counter cannot be reset.

27

MAINTENANCE BY THE OPERATOR

The Convection Combo is designed f or minim um m aintenance. Certain parts may need replacement after
prolonged use. If a service need arises , only Groen personnel or authorized Groen repres entatives should
perform the work.
Always supply water that meets the standards outlined in the Water Conditioning section of this manual If

steam or condensate is noticed leaking from around the door seal, take the following steps:

1. Check the condition of the gasket, and replace a cracked or split gasket.

2. To inspect the cooking chamber for drain blockage, remove the bottom partition and check the drain

opening in the oven floor.

3. If the previous steps do not stop leakage at the door, find the locations of the leaks by operating the

unit in Steam Mode. After the READY indicator lights, enter 10 minutes (00:10) in the timer and press
START. Mark the places around the door where water leaks out.

4. Have the following tools ready for use:

1/4 inch (6.4 mm) flat blade screwdriver 1/2 inch (12.7 mm)
combination wrench 1/2 inch (12.7 mm) socket with 3 inch (76 mm)
extension and ratchet

5. If the door leakage is on the hinge pin (left) side follow this procedure:

a) Mark the position of the 1/2 inch (12.7 mm) hex bolts on the top and bottom edge of the door near

each hinge pin.

WARNING: STEAM CAN CAUSE BURNS. AVOID ESCAPING STEAM WHEN OPENING DOOR.

b) Open door and loosen the hex bolts. If steam is leaking from the hinge bottom or top corner then

only loosen those bolts. Move the hex bolt heads toward the cavity and then retighten.

c) Repeat Steam Mode leak check and repeat steps and a & b as necessary.

6. If the door leakage is on the door pin (right) side follow this procedure.

a) Remove the two 8-32 x 3/8 inch (9.5 mm) truss head screws and cover plate behind the door pin

mounting plate.

b) Mark the position of the 1/2 inch (12.7 mm) hex nuts and the 1/2 inch (12.7 mm) hex bolts.
c) Check that the door pin is centered in each of the door slots. If necessary loosen the 1/2 inch (12.7

mm) hex bolts to reposition each door pin in the center of the door slot.

d) Loosen the 1/2 inch (12.7 mm) hex nuts on the top and bottom as needed. Move the door pin

plates(s) toward the cavity and retighten.
e) Repeat steam mode leak check and repeat step d as needed.
f) Replace cover plate and the two 8-32 x 3/8 inch (9.5 mm) truss head screws.

28

Troubleshooting

A. Pilot Burner

Remember that the front control panel will not operate until the pilot switch has been activated
and the pilot burner flames have been established (red lights are on). For details see the Initial
Start-Up section. If the procedure described in the Initial Start-Up section has been followed and
the pilot burner still does not ignite, then contact your authorized Groen Service Agency.

The following troubleshooting information concerns the unique self-diagnostic features of the
Groen Convection Combo and assumes that the pilot burner flames have been established.

B. Resetting the Solid Stat e Cont rols

If the controls stop responding to normal operating procedures, or if the unit is otherwise
behaving in an unusual way, reset the controls by the following procedure:

1. Switch off the power by pressing the ON touch pad.

2. While pressing the COMBO touch pad, switch the power on again. If no errors are present,

C. Meat Probe Error

If the Probe Temperature display reads PrOb OUT, then it means the meat probe is not
connected. Connect the meat probe and rotate the PROBE knob to the required temperature
setting (ranging between 80°F and 200°F).

the unit will beep and show four zeros in the timer display. If any errors are found, unit will
not beep, and Service Codes will be shown in the timer and cook temperature displays.
NOTE THESE SERVICE CODES. (A display showing "12" means error codes 1 and 2.
There is no error code 12.) Press the CLEAR touch pad to exit the Service mode, then
refer to the following explanation of service messages.

D. Service Messages

There are two types of service message:

1. Non-critical error. It is signaled by three quick beeps with the SERVICE light going out after
30 seconds.

2. Critical error. It is signaled by a continuous 5 second beep with the SERVICE light staying
on.

If there is a non-critical error, you may continue to operate the unit. When possible, inspect the
Service Code. To do this, begin with the power off. While pressing the COMBO touch pad,
switch on the power by pressing the ON touch pad. Note the number and refer to the
Troubleshooting Guide. To Clear the Service Code, press the CLEAR touch pad.

If there is a critical error, the unit will not operate in its present mode, but it may operate in
another mode. Inspect the Service Code, as instructed above, then call your authorized Groen
Service Agency.

If the problem continues after y ou follow the instructions in the Troubleshooting Guide, call your
authorized Groen Service Agency.

30

play

y

y

y

y

y

y

y

y

y

y

y

y

y

y

y

y

y

Troubleshooting Guide

If a problem persists after taking the actions suggested below, call your authorized Groen Service Agency.
Service Code Action Required

1 = Low water level probe Try cleaning the steam generator to remove any
2 = High water level probe contamination from the probes.

If either code is still dis

ed after you clean the

generator, call your Groen Service Agency.
If both codes are displayed, the unit will operate in the

Oven Mode only. If only one code is displayed, the
unit will operate in all modes, but water may overflow
from the generator into the cooking chamber during
operation in Steamer or Combo Mode.

3 = Maximum generator fill time (10 minutes) Make sure the water supply is turned on fully and the
exceeded hoses are not kinked or pinched.

If the code is still displayed, the unit will operate in
Oven Mode only. Call your Groen Service Agency.

4 = Faulty air probe Call your Groen Service Agency. The unit will operate
in Steamer and Clean Cycle Modes only.

5 = Faulty drain probe Call your Groen Service Agency. The unit will operate
in all modes.

6 = Faulty generator probe Call your Groen Service Agency. The unit will operate
in Oven Mode only.

7 = Out of calibration Call your Groen Service Agency. The unit will operate
in all modes.

8 = Maximum generator drain time (2 minutes) Inspect the drain line and remove any blockage.
exceeded Make sure the drain is free vented as detailed in the

Installation section.
If the code is still displayed, the unit will operate in

Oven Mode only. Call your Groen Service Agency.

no
no

no

8

es

1 & 2

no
no

es

no

Will Convection Combo operate in Mode when Code is displayed?

no
no

no

6

es

7
es
es
es

yes

Mode Service Message Code

Steam
Combo
Oven
Clean Cycle

1
es
es
es

yes

2
es
es
es

yes

3
no
no

es
no

4

es
no
no

yes

5
es
es
es

yes

31

References

AMERICAN GAS ASSOCIATION LABORATORIES
8501 East Pleasant Valley Road
Cleveland, Ohio 44131

AMERICAN NATIONAL STANDARDS

INSTITUTE, INC.
1430 Broadway
New York, New York 10018

CANADIAN GAS ASSOCIATION
55 Scarsdale Road
Don Mills, Ontario, Canada M3B 2R3

CAN 1-B149 Installation Codes for Gas Burning

Appliances & Equipment

ECOLAB, INC.
370 Wabasha
St. Paul, Minnesota 55102
800/352-5326 or 612/293-2233

NATIONAL FIRE PROTECTION ASSOCIATION 60
Battery March Park Quincy,
Massachusetts 02269

NFPA/70 The National Electrical Code

NATIONAL SANITATION FOUNDATION
3475 Plymouth Rd.
Ann Arbor, Michigan 48106

ZEP MANUFACTURING CO.
1310-T Seaboard Industrial Blvd.
Atlanta, Georgia 30318

32

Limited Warranty
To Commercial Purchasers *

(Domestic U.S., Hawaii &
Canadian Sales Only)

Groen Foodservice Equipment ("Groen Equipment") has been skillfully manufactured, carefully inspected and
packaged to m eet rigid standards of excellence. Groen warrants its Equipment to be free f rom defects in material
and workmanship for (12) twelve months with the following conditions and subject to the following limitations.

I. This parts and labor warranty is lim ited to G roen Equipment sold to the original commercial purc has er /user s

(but not original equipment manufacturers), at its original place of installation in the continental United
States, Hawaii and Canada.

II. Damage during shipment is to be reported to the carrier, is not covered under this warranty, and is the sole

responsibility of purchaser/user.

III. Groen, or an authorized service representative, will repair or replace, at Groen's sole elec tion, any Groen

Equipment, including but not limited to, drawoff valves, safety valves, gas and electr ic components, f ound
to be defective during the warranty period. As to warranty service in the territory described above, Groen
will absorb labor and portal to portal tr ansportation costs (tim e & mileage) for the f irst twelve (12) months
from date of installation or fifteen (15) months from date of shipment from Groen.

IV. This warranty does not cover boiler maintenanc e, calibration, per iodic adjustm ents as specified in operating

instructions or manuals, and consumable parts such as scraper blades, gaskets, packing, etc., or labor
costs incurred for removal of adjacent equipment or objects to gain access to Groen Equipment. This
warranty does not cover defects caused by improper inst allation, abuse, careless operation, or improper
maintenance of equipment. This warranty does not cover damage caused by poor water quality or
improper boiler maintenance.

V. THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,

INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
EACH OF WHICH IS HEREBY EXPRESSLY DISCLAIMED. THE REMEDIES DESCRIBED ABOVE ARE
EXCLUSIVE AND IN NO EVENT SHALL GROEN BE LIABLE FOR SPECIAL, CONSEQUENTIAL OR INCIDENTAL
DAMAGES FOR THE BREACH OR DELAY IN PERFORMANCE OF THIS WARRANTY.

VI. Groen Equipment is for commercial use only. If sold as a component of another (O.E.M.) manufacturer's equipment, or

if used as a consumer product, such Equipment is sold AS IS and without any warranty.

OM-CC40-G (3/96)

* (Covers All Foodservice Equipment Ordered After October 1,1995)

1900 Pratt Boulevard Elk Grove
Village, Illinois 60007 Telephone

GROEN

[phone] FAX [phone]