Convotherm OEB Series How to use

Service Handbook OEB/OES/OGB/OGS
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CONVOTHERM
Elektrogeräte GmbH
Service Documents OEB / OES
OGB / OGS
Service Folder No.:
(English)
Name:
Specifications are subject to change without notice.

Service handbook P3
AS / 07.11.2011 0_01en_Inhaltsverzeichnis +3_a
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Contents Service Documents
1. Service handbook +3 Serie &
Installation handbook
2. Service handbook mini World &
Installation handbook min World
3. Service documents extraction hood
(info on the enclosed DVD)
4. Service documents HACCP & ConvoControl
(info on the enclosed DVD)
5. Service documents AR & ConvoHold
(Info on the enclosed DVD)
6. Accessoires
7. Service Updates (info on the enclosed DVD)
8. Spare part lists (info on the enclosed DVD)
9. CONVOTHERM Service handling & contacts
10. CONVOTHERM Servicetraining
11. Wiring diagram (info on the enclosed DVD)
12. Current news (info on the enclosed DVD)

Service Handbook OEB/OES/OGB/OGS
AS/11-2011 0_001e_Acknowledgement_b
Acknowledgement
Please fill out legibly and return to CONVOTHERM Customer Service Department.
CONVOTHERM Elektrogeräte GmbH
- Service – Department -
Talstraße 35
82436 Untereglfing
Germany
Fax [phone]
We hereby acknowledge receipt of a CONVOTHERM Service-Folder
and confirm that we have taken note of the below mentioned copyright.
Copyright
We reserve all rights relating to this technical document.
This document may not be reproduced or made available to a third
party without our prior consent and it must not be misused otherwise
by the recipient or a third party (DIN 34).
Service Folder Nr.
Name:
Company name:
Street:
Town
Country:
E-Mail
Trainings date:
Service Trainer:
__________________ __________________________
date stamp / signature
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This service folder is subject to change notifications!
New information will be sent to the above address.
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Service Handbook OEB/OES/OGB/OGS
AS/11-2011 0_01e_Table of Contents_d
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Table of Contents
1. Installation Handbook
2. Unit Information OEB/OES/OGB/OGS
2.1 Control Panels OEB/OES/OGB/OGS
2.2 The closed system automatic steam and heat circulation
2.3 Basic settings (parallel to cooking programmes)
2.3.1a Standby mode for units with steam generator
2.3.1b Standby mode for units with direct injection
2.3.2 Outgoing water cooling
2.3.3 Demoisturizing in a Closed System (Crisp & Tasty)
2.3.4 Steam generator draining and rinsing
2.3.5 Automatic Cleaning (optional)
2.3.6 Water Flow plan
2.4 Safety settings (parallel to cooking programmes)
2.4.1 Door safety switch and Motor break
2.4.2 Electronic safety switches
2.4.3 Electrical safety switches
2.5 Functioning of the cooking programmes
2.5.1 Steaming at 100°C
2.5.2 Steaming under 100°C
2.5.3 Superheated Steam and Steaming over 100°C
2.5.4 Convection
2.5.5 Regeneration
2.5.6 Delta-T cooking
2.5.7 Cook & Hold
2.5.8a Overview Chart: Processes and probes in units with steam generator
2.5.8b Overview Chart: Processes and Probes in units with direct injection
2.6 Gas technology

Service Handbook OEB/OES/OGB/OGS
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3. Electronics Information OEB/OES/OGB/OGS
3.1 Customer Service — Service Programme
3.2 Error Codes
3.3 Emergency programme
3.5 Connection scheme of Control module and Gas module
4. Cleaning / Maintenance
4.1 Time table for necessary cleaning intervals
4.2 Automatic flushing of the steam generator on units with steam
generator
4.3 Cleaning the Unit
4.3.1Cleaning the oven
4.3.2 Half-automatic oven cleaning
4.3.3 Automatic Cleaning System CONVOClean system (Option)
4.3.4 Further cleaning measures
4.4 CONVOTHERM Descaling
4.4.1 Oven descaling in units with direct injection (OES / OGS)
4.4.2 Steam generator cleaning and descaling (nur bei OEB und OGB)
4.4.3 Unit parts descaling
4.6 Yearly Maintenance recommendations
4.6.1 Installation Check
4.6.2 Cleaning the combination oven steamer
4.6.3 Checking the electrical parts
4.6.4 Check and Visual check
4.6.5 Check the gas technical parts
4.7 Installation Checklist

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5. Trouble shooting List and Error Codes Electronic
5.1 Error Codes
5.2 General
5.3 Steam Generator
5.4 Condenser
5.5 Motor
5.6 Electronic
5.7 Safety temperature probe Convection heating (B7)
5.8 Error diagnosis with help of the LEDs on the Controls
(module self-checking)
6. Service Instructions
6.1 Electronic Control Board installation
6.1.1Operation module (BM) replacement
6.1.2Control Module (SM) replacement
6.1.3Arrangement module replacement
6.1.4Gas module (GM) removal
6.1.5Description of the LEDs on the Controls (module self-checking)
6.2 Updating the Control and Operation module - Software
6.4 Steam Generator drain pump (only OEB and OGB)
6.5 Probe positions / Probe assembly and replacing
6.5.1Safety thermostat above unit ceiling on table units
6.5.2Safety thermostat behind the motor fastening on standing units
6.5.3Probe with stuffing box assembly B10 (CTC)
6.5.4Safety thermostat probe N8 on flange immersion heater
6.5.5Double safety thermostats B8 and B7.2 in gas units with blower burner
6.5.6Screw in probes B3, B4, B5 and oven probe B6
6.6 Water Level probe
6.7 Steam Generator-Immersion heater replacement (only OEB)
6.8 Motor / Fan Wheel installation and removal
6.9 Pressure Switch Cleaning System - Trouble Shooting

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6.10 Dummy operation for P3 – units
6.11 Condenser removal and installation
6.12 Door latch / Door contact switch removal and installation
6.13 Using the water analysis unit Article No.: 3019007
6.15 Sealing the Corners on the Door Gasket Frame
6.17 Inner and outer door replacement
6.20 Drip tray for overflow protection
6.21 Convection Heater removal and replacement
6.22 Removing and replacing the Convection heat exchanger
6.23 Removing and replacing the burners
6.25 Readjusting the Gas valves
6.26 Changing the gas type
6.30 Disappearing Door Replacement / Adjustment /
Spare Part Replacement

Service Handbook OEB/OES/OGB/OGS
In this Service Handbook, the following pictures and depictions are used as important
safety advice for the installer and to a certain extent for the user. The safety advice and
especially the warnings are to be absolutely observed and followed.
Bold print indicates important safety advice.
Attention: indicates danger to people, unit
parts or possible damage to functions.
Attention: Danger of explosion
Attention: Dangerous voltage
Attention Danger of burning: Danger due to hot surfaces
or mediums i.e. steam.
Attention: Observe loading height
Advice to be passed on to the user!
Pictures indicating for electric units
Pictures indicating for gas units
Pictures indicating for units with steam generator
Pictures indicating for units with Direct injection
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Service Handbook OEB/OES/OGB/OGS
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Instructions
Advice
Information
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Check
Special
tool
Tips
and Tricks
Cross reference
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Service Handbook OEB/OES/OGB/OGS
CONVOTHERM Telephone numbers
Telephone (Main): (+49) (0) 8847 - 67 0
Fax: (+49) (0) 8847 - 414
- 67 191
Sales Domestic:
CONVOTHERM Elektrogeräte (+49) (0) 8847 - 67 0
Talstr. 35
82436 Eglfing
e – mail [email protected]
Sales Export: (+49) (0) 8847 - 67-0
e - mail [email protected]
User Hotline
Hotline (daily 8 – 20 o’clock) (+49) (0) 8847 - 67-899
e – mail [email protected]
[email protected]
Customer Service
Service Hotline (office) (+49) (0) 8847 - 67- 541
Service Hotline (weekends) (+49) (0) 175 - 405 41 09
e – mail [email protected]
Internet www.convotherm.com
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Service Handbook OEB/OES/OGB/OGS
Safety Advice
Improper positioning, installation, setting, training, service or maintenance, as well as changes
on the unit can cause injuries that could lead to death of the installer or operator and also lead
to damage on the unit.
Please note that any improper performance regarding the above, invalidates the guarantee.
Before looking for an error or performing maintenance or repair work on the unit, thoroughly and
carefully read through the Safety Advice and the appropriate Service Instructions. Observe also
the relevant Safety Advice in the Installation Handbook and the User Manual. Both are included
in the unit shipment. Check with your Customers.
Hazardous
Attention - Danger of explosion when gas odor is present
Immediately shut off the gas supply
Ventilate the room thoroughly
Avoid sparks (this means the operation of switches, telephones or contact with
electric switching elements ) or open flames.
Inform the gas supplier and/or the fire department (external telephone).
Attention - Electric shock
The combination oven steamer main power supply must be shut off before
opening the side panel and performing maintenance or repair work (only by a
certified electrician) !
An all-pole isolation switch with a minimum contact opening of 3mm must be
located close to the unit - on site in order to switch off the power supply when
outer cleaning is performed, repair or installation work is done and during
longer times that the unit is out of operation.
Danger of injury
Attention - Danger of scalding or burning:
Maintenance and repair work should only be performed on a cold unit!
Never spray into a hot oven with the hand shower!
Allow combination oven steamer to cool down to an oven temperature under
60°C.
General Advice
Observe all prevailing regulations and standards.
Only use original spare parts.
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Service Handbook OEB/OES/OGB/OGS
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Safety Advice for Service work
Attention – Lifting or sliding unit:
Avoid damaging the power, water and drainage connections when moving the
unit.
Make sure that the unit is secured against tilting or slipping while being
moved.
Observe the weight of the unit:
Electric units
CONVOTHERM OES / OEB 6.10: 170 kg
CONVOTHERM OES / OEB 6.20: 220 kg
CONVOTHERM OES / OEB10.10: 215 kg
CONVOTHERM OES / OEB10.20: 245 kg
CONVOTHERM OES / OEB12.20: 325* kg
CONVOTHERM OES / OEB20.10: 340* kg
CONVOTHERM OES / OEB20.20: 440* kg
* = incl. loading trolley
Gas units
CONVOTHERM OGS / OGB6.10: 170 kg
CONVOTHERM OGS / OGB6.20: 220 kg
CONVOTHERM OGS / OGB10.10: 215 kg
CONVOTHERM OGS / OGB10.20: 245 kg
CONVOTHERM OGS / OGB12.20: 325* kg
CONVOTHERM OGS / OGB20.10: 340* kg
CONVOTHERM OGS / OGB20.20: 440* kg
* = incl. loading trolley
Attention – Working in the connection area of the unit:
Work in the connection area of the unit must be carried out by a qualified
electrician in accordance with the local power supply company regulations as
well as current EU regulations.
When working in the connection area, the unit main power supply must be
shut off (an all-pole isolation switch with a minimum contact opening of 3mm
must be located close to the unit) Make sure that the unit's power has indeed
been switched off!
After servicing, a final test, according to the local and current regulations, must
be performed.
Attention – working on the unit's gas system:
Working on the gas technology in a unit can only be performed by a qualified
installer from an authorized gas supplier.
Check all connection points outside and inside the unit for sealed tightness
(with a gas detector or leakage spray).
Attention: Do not spray leakage spray on electrical components of the
ignition and flame monitoring devices!
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Service Handbook OEB/OES/OGB/OGS
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Shipping Information/ Environmental protection
Dear Customer and interested party,
We are certified in accordance with ISO 9001 (Quality Assurance) and ISO 14001 (Environmental
protection) and we are committed to lowering the effects of environmental waste.
Thereby, there are additional regulations to follow for environmental protection and conservation that go
beyond the essential statutory rules and regulations.
Therefore:
-Only residue-free organic filling material is used.
-Shipping cartons are reused.
-Supplier parts are only used that are packed in environmentally friendly materials.
-Recommended/Applied Cleaning materials are biodegradable.
-Electronic scrap is collected and brought to recycling centers.
-Scrap units are dismantled by a specialized company and recycled.
Commit yourself to environmental protection with us, so that together we can work to avoid waste
in the future.
When shipping to CONVOTHERM use only organic material.
A complete avoidance of waste is not possible.
However, there are advantages to making an effort at reduction, that when done together can make it
financially worth our while.
Responsible and conscientious purchasing is not only applied environmental protection but at the same
time business protection. Take the opportunity to admonish waste.
Your C O N V O T H E R M Service Team

Service Handbook OEB/OES/OGB/OGS
AS/11-2011 2_01e_Control Panels_b
2.1 Control Panels OEB/OES/OGB/OGS
1= ON / OFF
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2= Cooking programme ,Steaming
3= Cooking programme ,Superheated
steam
4= Cooking programme ,Convection
5 = Cooking programme,
Regeneration
6 = Start / Stop
7 = Cookbook (Choose recipe)
8 = Mr.C
9 = Writing / Editing (in Cookbook)
10 = reduced power (Option for
CONVOTHERM OES and OGS)
11 = Burner or heater on
12= reduced fan speed (Option for
CONVOTHERM OES and OGS)
13 = Cooking mode
14 = Button lock
15 = Crisp & tasty (Demoisturizing)
16 = Programme protection
17 = Display
18 = Oven temperature
19 = Cooking time
20 = Core temperature (Option for
CONVOTHERM OES and OGS)
21 = Page / Scroll left
22 = Page / Scroll right
23 = Setting switch
24 = Press & Go (Pictogram keys)
Cross reference:
Further information on Control panels refer to
User Manual

Service Handbook OEB/OES/OGB/OGS
2.2 The Closed System automatic steam and heat circulation
Electric unit with steam generator (OEB) Gas unit with steam generator (OGB)
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Electric unit with direct injection (OES) Gas unit with direct injection (OGS)
1 = Pressure compensation valve
2 = Fan
3 = Suction panel
4 = Oven
5 = Convection heater / Convection heat exchanger
6 = Air and Steam circulation
7 = Cover for Demoisturizing insert
8 = Oven drain
9 = Demoisturizing insert
10 = Condenser
11 = Hydraulic seal in condenser
12 = Injection nozzle for Demoisturizing
13 = Condenser outlet
14 = Condenser over flow
15 = Injection nozzle Condenser cooling
16 = Water inlet Demoisturizing
17 = Water inlet Condenser cooling
18 = Water inlet Steam generator filling / Water inlet
direct injection
19 = Breather pipe
20 = Ventilation pipe
21 = Water level probe / Direct injection
22 = Steam generator
23 = Steam outlet opening
24 = Fan
25 = Immersion heating element / Steam generator
heat exchanger
26 = Pump for draining the steam generator
Information: Advantages of the original CONVOTHERM CLOSED SYSTEM
Greater steam and temperature saturation
More intensive heat transfer
Shorter cooking times
Less energy and water consumption
"Quick steam cooking" pressureless over 100 °C
Optimum automatic steam regulation specific to product
No unwanted odors during the cooking process
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Service Handbook OEB/OES/OGB/OGS
2.3 Basic settings (parallel to cooking programmes)
2.3.1a Standby mode for units with steam generator
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Information:
After switching on, the steam generator 4is automatically filled with water and
preheated.
Solenoid valve Y3 7opens; water flows through the injection nozzle 10 and
the back flow protection 9in the steam generator 4.
The water level rises. When the shorter water level probe is reached (B1 - bl)
2the solenoid valve closes Y3 7and the contactors K1, K2 and K3 switch the
steam generator immersion heating element 5on, as in Gas units the
automatic firing N21 switches the steam generator burner 6on.
The opening and closing of the solenoid valve Y3 7maintains the correct
water level during operation via the water level probe (B1 - bl) 2.
The water in the steam generator is preheated to 80 - 90 °C.
The preheating probe B4 3in the settling chamber 1monitors the minimum
temperature.
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Service Handbook OEB/OES/OGB/OGS
AS/11-2011 2_03_01e_Standby mode_b
Notice:
The control loop of the cooking programme has priority over the standby mode
of the steam generator. This means, for example, that the convection
programme selected temperature will be attained first, before the steam
generator standby mode temperature is attained.
When the water level falls below the longer level probe (B1 - rd) 2within a
short time an error code is triggered.
The steam generator temperature is regulated by the preheating probe B4 3.
Only after the oven has reached the standby mode temperature, will the timer
begin running in programmes with steam.
A safety thermostat monitors the maximum temperature of the heaters and
burners.
Cross reference:
Service Handbook 6.7 Assembly of the Steam generator and Immersion
heating element.
Service Handbook 6.6 Water Level Probe
Service Handbook 5. Trouble shooting and Error Codes Electronic
2.3.1b Standby mode for units with direct injection
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Notice:
Units with direct injection are in standby mode directly after being switched on.

Service Handbook OEB/OES/OGB/OGS
2.3 Basic settings (parallel to cooking programmes)
2.3.2 Outgoing water cooling
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1 = Demoisturizing tub
2 = Oven drain with Condenser connection
3 = Oven floor
4 = Water inlet Condenser cooling
5 = Water drainage Door drip tray
6 = Bypass probe B5
7 = Bypass section
8 = Solenoid valve Condenser "cooling" Y1
9 = Bypass pipe
10 =Condenser over flow
11 =Condenser drain
12 =Cold water injection Condenser
13 =Condenser probe B3
14 =Condenser
15 =Ventilation section
16 = Electronic controls Control module
17 = Water inlet Demoisturizing
18 = Injection nozzle Demoisturizing
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Information:
The Condenser probe (B3) 13 monitors the outgoing water temperature in the
condenser. The solenoid valve Y1 8 opens if the temperature rises to
approximately 65 °C . Cold water is injected through the injection nozzle 12 until
the outgoing water has cooled down to an acceptable temperature.
Check:
Noise, water flowing back out of the drain.
Cross reference:
Service Handbook 6.11 "Condenser removal and assembly“
Service Handbook 5. Trouble shooting and Error Codes Electronic
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Service Handbook OEB/OES/OGB/OGS
2.3 Basic Settings (parallel to cooking programmes)
2.3.3 Demoisturizing in a Closed System (Crisp & Tasty)
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1 = Oven drain
2 = Oven floor
3 = Solenoid valve Demoisturizing Y2
4 = Water inlet Demoisturizing
5 = Injection nozzle Demoisturizing
6 = Cover Demoisturizing tub
7 = Demoisturizing tub
8 = Control module (SM)
9 = Condenser
10 =Condenser over flow
11 =Condenser outlet
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Information:
The oven atmosphere can be demoisturized in the convection and Super Heated
Steam cooking programmes by way of the demoisturizing tub.
The solenoid valve Y2 3opens and via the demoisturizing nozzle 5cold water is
sprayed into the demoisturizing tub 7. The cover 6 for the demoisturizing tub
prevents water from spraying into the oven. The injected water flows through the
condenser 9and out of the unit.
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Service Handbook OEB/OES/OGB/OGS
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Information – Functioning principle of Demoisturization:
The injection of water creates a cold water ‚curtain‘,
a) on which the oven atmosphere moisture can condensate,
b) then according to the Venturi Prinziple, the moisture from the oven is
suctioned out and re-condensed into water
c) that the cover 6 of the demoisturizing tub 7cools, so that this additional
steam condensation,
d) additionally cools the condenser 9 water.
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Information:
Demoisturization is selected in the Mr. C. Menu in 3 steps ( light, middle,
full). In steps "light" and "middle", demoisturization will continue until the
preselected Bypass value is reached. In step "full", demoisturizing runs
continuously. When demoisturizing is activated, the steam generator heating /
steam generator burner remains switched off. The Convectioin heating /
Convection burner is switched on as needed.
The demoisturizing can be saved at the end of the recipe in the cookbook. Thereby
shortly before the cooking programme ends, the released moisture when opening
the door will be reduced and the kitchen atmosphere relieved.
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Check:
Noise, water flowing out of the drain
Cross Reference:
Service Handbook 6.11 "Condenser removal and assembly“
Service Handbook 5. Trouble shooting and Error Codes Electronic
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